| /* |
| * Copyright (c) 1996, 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package java.io; |
| |
| import java.lang.ref.Reference; |
| import java.lang.ref.ReferenceQueue; |
| import java.lang.ref.SoftReference; |
| import java.lang.ref.WeakReference; |
| import java.lang.reflect.Constructor; |
| import java.lang.reflect.Field; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Member; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Modifier; |
| import java.lang.reflect.Proxy; |
| import java.security.AccessController; |
| import java.security.MessageDigest; |
| import java.security.NoSuchAlgorithmException; |
| import java.security.PrivilegedAction; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.HashSet; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| import jdk.internal.misc.Unsafe; |
| import sun.reflect.CallerSensitive; |
| import sun.reflect.Reflection; |
| import sun.reflect.ReflectionFactory; |
| import sun.reflect.misc.ReflectUtil; |
| |
| import static java.io.ObjectStreamField.*; |
| |
| /** |
| * Serialization's descriptor for classes. It contains the name and |
| * serialVersionUID of the class. The ObjectStreamClass for a specific class |
| * loaded in this Java VM can be found/created using the lookup method. |
| * |
| * <p>The algorithm to compute the SerialVersionUID is described in |
| * <a href="../../../platform/serialization/spec/class.html#4100">Object |
| * Serialization Specification, Section 4.6, Stream Unique Identifiers</a>. |
| * |
| * @author Mike Warres |
| * @author Roger Riggs |
| * @see ObjectStreamField |
| * @see <a href="../../../platform/serialization/spec/class.html">Object Serialization Specification, Section 4, Class Descriptors</a> |
| * @since 1.1 |
| */ |
| public class ObjectStreamClass implements Serializable { |
| |
| /** serialPersistentFields value indicating no serializable fields */ |
| public static final ObjectStreamField[] NO_FIELDS = |
| new ObjectStreamField[0]; |
| |
| private static final long serialVersionUID = -6120832682080437368L; |
| private static final ObjectStreamField[] serialPersistentFields = |
| NO_FIELDS; |
| |
| /** reflection factory for obtaining serialization constructors */ |
| private static final ReflectionFactory reflFactory = |
| AccessController.doPrivileged( |
| new ReflectionFactory.GetReflectionFactoryAction()); |
| |
| private static class Caches { |
| /** cache mapping local classes -> descriptors */ |
| static final ConcurrentMap<WeakClassKey,Reference<?>> localDescs = |
| new ConcurrentHashMap<>(); |
| |
| /** cache mapping field group/local desc pairs -> field reflectors */ |
| static final ConcurrentMap<FieldReflectorKey,Reference<?>> reflectors = |
| new ConcurrentHashMap<>(); |
| |
| /** queue for WeakReferences to local classes */ |
| private static final ReferenceQueue<Class<?>> localDescsQueue = |
| new ReferenceQueue<>(); |
| /** queue for WeakReferences to field reflectors keys */ |
| private static final ReferenceQueue<Class<?>> reflectorsQueue = |
| new ReferenceQueue<>(); |
| } |
| |
| /** class associated with this descriptor (if any) */ |
| private Class<?> cl; |
| /** name of class represented by this descriptor */ |
| private String name; |
| /** serialVersionUID of represented class (null if not computed yet) */ |
| private volatile Long suid; |
| |
| /** true if represents dynamic proxy class */ |
| private boolean isProxy; |
| /** true if represents enum type */ |
| private boolean isEnum; |
| /** true if represented class implements Serializable */ |
| private boolean serializable; |
| /** true if represented class implements Externalizable */ |
| private boolean externalizable; |
| /** true if desc has data written by class-defined writeObject method */ |
| private boolean hasWriteObjectData; |
| /** |
| * true if desc has externalizable data written in block data format; this |
| * must be true by default to accommodate ObjectInputStream subclasses which |
| * override readClassDescriptor() to return class descriptors obtained from |
| * ObjectStreamClass.lookup() (see 4461737) |
| */ |
| private boolean hasBlockExternalData = true; |
| |
| /** |
| * Contains information about InvalidClassException instances to be thrown |
| * when attempting operations on an invalid class. Note that instances of |
| * this class are immutable and are potentially shared among |
| * ObjectStreamClass instances. |
| */ |
| private static class ExceptionInfo { |
| private final String className; |
| private final String message; |
| |
| ExceptionInfo(String cn, String msg) { |
| className = cn; |
| message = msg; |
| } |
| |
| /** |
| * Returns (does not throw) an InvalidClassException instance created |
| * from the information in this object, suitable for being thrown by |
| * the caller. |
| */ |
| InvalidClassException newInvalidClassException() { |
| return new InvalidClassException(className, message); |
| } |
| } |
| |
| /** exception (if any) thrown while attempting to resolve class */ |
| private ClassNotFoundException resolveEx; |
| /** exception (if any) to throw if non-enum deserialization attempted */ |
| private ExceptionInfo deserializeEx; |
| /** exception (if any) to throw if non-enum serialization attempted */ |
| private ExceptionInfo serializeEx; |
| /** exception (if any) to throw if default serialization attempted */ |
| private ExceptionInfo defaultSerializeEx; |
| |
| /** serializable fields */ |
| private ObjectStreamField[] fields; |
| /** aggregate marshalled size of primitive fields */ |
| private int primDataSize; |
| /** number of non-primitive fields */ |
| private int numObjFields; |
| /** reflector for setting/getting serializable field values */ |
| private FieldReflector fieldRefl; |
| /** data layout of serialized objects described by this class desc */ |
| private volatile ClassDataSlot[] dataLayout; |
| |
| /** serialization-appropriate constructor, or null if none */ |
| private Constructor<?> cons; |
| /** class-defined writeObject method, or null if none */ |
| private Method writeObjectMethod; |
| /** class-defined readObject method, or null if none */ |
| private Method readObjectMethod; |
| /** class-defined readObjectNoData method, or null if none */ |
| private Method readObjectNoDataMethod; |
| /** class-defined writeReplace method, or null if none */ |
| private Method writeReplaceMethod; |
| /** class-defined readResolve method, or null if none */ |
| private Method readResolveMethod; |
| |
| /** local class descriptor for represented class (may point to self) */ |
| private ObjectStreamClass localDesc; |
| /** superclass descriptor appearing in stream */ |
| private ObjectStreamClass superDesc; |
| |
| /** true if, and only if, the object has been correctly initialized */ |
| private boolean initialized; |
| |
| /** |
| * Initializes native code. |
| */ |
| private static native void initNative(); |
| static { |
| initNative(); |
| } |
| |
| /** |
| * Find the descriptor for a class that can be serialized. Creates an |
| * ObjectStreamClass instance if one does not exist yet for class. Null is |
| * returned if the specified class does not implement java.io.Serializable |
| * or java.io.Externalizable. |
| * |
| * @param cl class for which to get the descriptor |
| * @return the class descriptor for the specified class |
| */ |
| public static ObjectStreamClass lookup(Class<?> cl) { |
| return lookup(cl, false); |
| } |
| |
| /** |
| * Returns the descriptor for any class, regardless of whether it |
| * implements {@link Serializable}. |
| * |
| * @param cl class for which to get the descriptor |
| * @return the class descriptor for the specified class |
| * @since 1.6 |
| */ |
| public static ObjectStreamClass lookupAny(Class<?> cl) { |
| return lookup(cl, true); |
| } |
| |
| /** |
| * Returns the name of the class described by this descriptor. |
| * This method returns the name of the class in the format that |
| * is used by the {@link Class#getName} method. |
| * |
| * @return a string representing the name of the class |
| */ |
| public String getName() { |
| return name; |
| } |
| |
| /** |
| * Return the serialVersionUID for this class. The serialVersionUID |
| * defines a set of classes all with the same name that have evolved from a |
| * common root class and agree to be serialized and deserialized using a |
| * common format. NonSerializable classes have a serialVersionUID of 0L. |
| * |
| * @return the SUID of the class described by this descriptor |
| */ |
| public long getSerialVersionUID() { |
| // REMIND: synchronize instead of relying on volatile? |
| if (suid == null) { |
| suid = AccessController.doPrivileged( |
| new PrivilegedAction<Long>() { |
| public Long run() { |
| return computeDefaultSUID(cl); |
| } |
| } |
| ); |
| } |
| return suid.longValue(); |
| } |
| |
| /** |
| * Return the class in the local VM that this version is mapped to. Null |
| * is returned if there is no corresponding local class. |
| * |
| * @return the <code>Class</code> instance that this descriptor represents |
| */ |
| @CallerSensitive |
| public Class<?> forClass() { |
| if (cl == null) { |
| return null; |
| } |
| requireInitialized(); |
| if (System.getSecurityManager() != null) { |
| Class<?> caller = Reflection.getCallerClass(); |
| if (ReflectUtil.needsPackageAccessCheck(caller.getClassLoader(), cl.getClassLoader())) { |
| ReflectUtil.checkPackageAccess(cl); |
| } |
| } |
| return cl; |
| } |
| |
| /** |
| * Return an array of the fields of this serializable class. |
| * |
| * @return an array containing an element for each persistent field of |
| * this class. Returns an array of length zero if there are no |
| * fields. |
| * @since 1.2 |
| */ |
| public ObjectStreamField[] getFields() { |
| return getFields(true); |
| } |
| |
| /** |
| * Get the field of this class by name. |
| * |
| * @param name the name of the data field to look for |
| * @return The ObjectStreamField object of the named field or null if |
| * there is no such named field. |
| */ |
| public ObjectStreamField getField(String name) { |
| return getField(name, null); |
| } |
| |
| /** |
| * Return a string describing this ObjectStreamClass. |
| */ |
| public String toString() { |
| return name + ": static final long serialVersionUID = " + |
| getSerialVersionUID() + "L;"; |
| } |
| |
| /** |
| * Looks up and returns class descriptor for given class, or null if class |
| * is non-serializable and "all" is set to false. |
| * |
| * @param cl class to look up |
| * @param all if true, return descriptors for all classes; if false, only |
| * return descriptors for serializable classes |
| */ |
| static ObjectStreamClass lookup(Class<?> cl, boolean all) { |
| if (!(all || Serializable.class.isAssignableFrom(cl))) { |
| return null; |
| } |
| processQueue(Caches.localDescsQueue, Caches.localDescs); |
| WeakClassKey key = new WeakClassKey(cl, Caches.localDescsQueue); |
| Reference<?> ref = Caches.localDescs.get(key); |
| Object entry = null; |
| if (ref != null) { |
| entry = ref.get(); |
| } |
| EntryFuture future = null; |
| if (entry == null) { |
| EntryFuture newEntry = new EntryFuture(); |
| Reference<?> newRef = new SoftReference<>(newEntry); |
| do { |
| if (ref != null) { |
| Caches.localDescs.remove(key, ref); |
| } |
| ref = Caches.localDescs.putIfAbsent(key, newRef); |
| if (ref != null) { |
| entry = ref.get(); |
| } |
| } while (ref != null && entry == null); |
| if (entry == null) { |
| future = newEntry; |
| } |
| } |
| |
| if (entry instanceof ObjectStreamClass) { // check common case first |
| return (ObjectStreamClass) entry; |
| } |
| if (entry instanceof EntryFuture) { |
| future = (EntryFuture) entry; |
| if (future.getOwner() == Thread.currentThread()) { |
| /* |
| * Handle nested call situation described by 4803747: waiting |
| * for future value to be set by a lookup() call further up the |
| * stack will result in deadlock, so calculate and set the |
| * future value here instead. |
| */ |
| entry = null; |
| } else { |
| entry = future.get(); |
| } |
| } |
| if (entry == null) { |
| try { |
| entry = new ObjectStreamClass(cl); |
| } catch (Throwable th) { |
| entry = th; |
| } |
| if (future.set(entry)) { |
| Caches.localDescs.put(key, new SoftReference<>(entry)); |
| } else { |
| // nested lookup call already set future |
| entry = future.get(); |
| } |
| } |
| |
| if (entry instanceof ObjectStreamClass) { |
| return (ObjectStreamClass) entry; |
| } else if (entry instanceof RuntimeException) { |
| throw (RuntimeException) entry; |
| } else if (entry instanceof Error) { |
| throw (Error) entry; |
| } else { |
| throw new InternalError("unexpected entry: " + entry); |
| } |
| } |
| |
| /** |
| * Placeholder used in class descriptor and field reflector lookup tables |
| * for an entry in the process of being initialized. (Internal) callers |
| * which receive an EntryFuture belonging to another thread as the result |
| * of a lookup should call the get() method of the EntryFuture; this will |
| * return the actual entry once it is ready for use and has been set(). To |
| * conserve objects, EntryFutures synchronize on themselves. |
| */ |
| private static class EntryFuture { |
| |
| private static final Object unset = new Object(); |
| private final Thread owner = Thread.currentThread(); |
| private Object entry = unset; |
| |
| /** |
| * Attempts to set the value contained by this EntryFuture. If the |
| * EntryFuture's value has not been set already, then the value is |
| * saved, any callers blocked in the get() method are notified, and |
| * true is returned. If the value has already been set, then no saving |
| * or notification occurs, and false is returned. |
| */ |
| synchronized boolean set(Object entry) { |
| if (this.entry != unset) { |
| return false; |
| } |
| this.entry = entry; |
| notifyAll(); |
| return true; |
| } |
| |
| /** |
| * Returns the value contained by this EntryFuture, blocking if |
| * necessary until a value is set. |
| */ |
| synchronized Object get() { |
| boolean interrupted = false; |
| while (entry == unset) { |
| try { |
| wait(); |
| } catch (InterruptedException ex) { |
| interrupted = true; |
| } |
| } |
| if (interrupted) { |
| AccessController.doPrivileged( |
| new PrivilegedAction<>() { |
| public Void run() { |
| Thread.currentThread().interrupt(); |
| return null; |
| } |
| } |
| ); |
| } |
| return entry; |
| } |
| |
| /** |
| * Returns the thread that created this EntryFuture. |
| */ |
| Thread getOwner() { |
| return owner; |
| } |
| } |
| |
| /** |
| * Creates local class descriptor representing given class. |
| */ |
| private ObjectStreamClass(final Class<?> cl) { |
| this.cl = cl; |
| name = cl.getName(); |
| isProxy = Proxy.isProxyClass(cl); |
| isEnum = Enum.class.isAssignableFrom(cl); |
| serializable = Serializable.class.isAssignableFrom(cl); |
| externalizable = Externalizable.class.isAssignableFrom(cl); |
| |
| Class<?> superCl = cl.getSuperclass(); |
| superDesc = (superCl != null) ? lookup(superCl, false) : null; |
| localDesc = this; |
| |
| if (serializable) { |
| AccessController.doPrivileged(new PrivilegedAction<>() { |
| public Void run() { |
| if (isEnum) { |
| suid = Long.valueOf(0); |
| fields = NO_FIELDS; |
| return null; |
| } |
| if (cl.isArray()) { |
| fields = NO_FIELDS; |
| return null; |
| } |
| |
| suid = getDeclaredSUID(cl); |
| try { |
| fields = getSerialFields(cl); |
| computeFieldOffsets(); |
| } catch (InvalidClassException e) { |
| serializeEx = deserializeEx = |
| new ExceptionInfo(e.classname, e.getMessage()); |
| fields = NO_FIELDS; |
| } |
| |
| if (externalizable) { |
| cons = getExternalizableConstructor(cl); |
| } else { |
| cons = getSerializableConstructor(cl); |
| writeObjectMethod = getPrivateMethod(cl, "writeObject", |
| new Class<?>[] { ObjectOutputStream.class }, |
| Void.TYPE); |
| readObjectMethod = getPrivateMethod(cl, "readObject", |
| new Class<?>[] { ObjectInputStream.class }, |
| Void.TYPE); |
| readObjectNoDataMethod = getPrivateMethod( |
| cl, "readObjectNoData", null, Void.TYPE); |
| hasWriteObjectData = (writeObjectMethod != null); |
| } |
| writeReplaceMethod = getInheritableMethod( |
| cl, "writeReplace", null, Object.class); |
| readResolveMethod = getInheritableMethod( |
| cl, "readResolve", null, Object.class); |
| return null; |
| } |
| }); |
| } else { |
| suid = Long.valueOf(0); |
| fields = NO_FIELDS; |
| } |
| |
| try { |
| fieldRefl = getReflector(fields, this); |
| } catch (InvalidClassException ex) { |
| // field mismatches impossible when matching local fields vs. self |
| throw new InternalError(ex); |
| } |
| |
| if (deserializeEx == null) { |
| if (isEnum) { |
| deserializeEx = new ExceptionInfo(name, "enum type"); |
| } else if (cons == null) { |
| deserializeEx = new ExceptionInfo(name, "no valid constructor"); |
| } |
| } |
| for (int i = 0; i < fields.length; i++) { |
| if (fields[i].getField() == null) { |
| defaultSerializeEx = new ExceptionInfo( |
| name, "unmatched serializable field(s) declared"); |
| } |
| } |
| initialized = true; |
| } |
| |
| /** |
| * Creates blank class descriptor which should be initialized via a |
| * subsequent call to initProxy(), initNonProxy() or readNonProxy(). |
| */ |
| ObjectStreamClass() { |
| } |
| |
| /** |
| * Initializes class descriptor representing a proxy class. |
| */ |
| void initProxy(Class<?> cl, |
| ClassNotFoundException resolveEx, |
| ObjectStreamClass superDesc) |
| throws InvalidClassException |
| { |
| ObjectStreamClass osc = null; |
| if (cl != null) { |
| osc = lookup(cl, true); |
| if (!osc.isProxy) { |
| throw new InvalidClassException( |
| "cannot bind proxy descriptor to a non-proxy class"); |
| } |
| } |
| this.cl = cl; |
| this.resolveEx = resolveEx; |
| this.superDesc = superDesc; |
| isProxy = true; |
| serializable = true; |
| suid = Long.valueOf(0); |
| fields = NO_FIELDS; |
| if (osc != null) { |
| localDesc = osc; |
| name = localDesc.name; |
| externalizable = localDesc.externalizable; |
| writeReplaceMethod = localDesc.writeReplaceMethod; |
| readResolveMethod = localDesc.readResolveMethod; |
| deserializeEx = localDesc.deserializeEx; |
| cons = localDesc.cons; |
| } |
| fieldRefl = getReflector(fields, localDesc); |
| initialized = true; |
| } |
| |
| /** |
| * Initializes class descriptor representing a non-proxy class. |
| */ |
| void initNonProxy(ObjectStreamClass model, |
| Class<?> cl, |
| ClassNotFoundException resolveEx, |
| ObjectStreamClass superDesc) |
| throws InvalidClassException |
| { |
| long suid = Long.valueOf(model.getSerialVersionUID()); |
| ObjectStreamClass osc = null; |
| if (cl != null) { |
| osc = lookup(cl, true); |
| if (osc.isProxy) { |
| throw new InvalidClassException( |
| "cannot bind non-proxy descriptor to a proxy class"); |
| } |
| if (model.isEnum != osc.isEnum) { |
| throw new InvalidClassException(model.isEnum ? |
| "cannot bind enum descriptor to a non-enum class" : |
| "cannot bind non-enum descriptor to an enum class"); |
| } |
| |
| if (model.serializable == osc.serializable && |
| !cl.isArray() && |
| suid != osc.getSerialVersionUID()) { |
| throw new InvalidClassException(osc.name, |
| "local class incompatible: " + |
| "stream classdesc serialVersionUID = " + suid + |
| ", local class serialVersionUID = " + |
| osc.getSerialVersionUID()); |
| } |
| |
| if (!classNamesEqual(model.name, osc.name)) { |
| throw new InvalidClassException(osc.name, |
| "local class name incompatible with stream class " + |
| "name \"" + model.name + "\""); |
| } |
| |
| if (!model.isEnum) { |
| if ((model.serializable == osc.serializable) && |
| (model.externalizable != osc.externalizable)) { |
| throw new InvalidClassException(osc.name, |
| "Serializable incompatible with Externalizable"); |
| } |
| |
| if ((model.serializable != osc.serializable) || |
| (model.externalizable != osc.externalizable) || |
| !(model.serializable || model.externalizable)) { |
| deserializeEx = new ExceptionInfo( |
| osc.name, "class invalid for deserialization"); |
| } |
| } |
| } |
| |
| this.cl = cl; |
| this.resolveEx = resolveEx; |
| this.superDesc = superDesc; |
| name = model.name; |
| this.suid = suid; |
| isProxy = false; |
| isEnum = model.isEnum; |
| serializable = model.serializable; |
| externalizable = model.externalizable; |
| hasBlockExternalData = model.hasBlockExternalData; |
| hasWriteObjectData = model.hasWriteObjectData; |
| fields = model.fields; |
| primDataSize = model.primDataSize; |
| numObjFields = model.numObjFields; |
| |
| if (osc != null) { |
| localDesc = osc; |
| writeObjectMethod = localDesc.writeObjectMethod; |
| readObjectMethod = localDesc.readObjectMethod; |
| readObjectNoDataMethod = localDesc.readObjectNoDataMethod; |
| writeReplaceMethod = localDesc.writeReplaceMethod; |
| readResolveMethod = localDesc.readResolveMethod; |
| if (deserializeEx == null) { |
| deserializeEx = localDesc.deserializeEx; |
| } |
| cons = localDesc.cons; |
| } |
| |
| fieldRefl = getReflector(fields, localDesc); |
| // reassign to matched fields so as to reflect local unshared settings |
| fields = fieldRefl.getFields(); |
| initialized = true; |
| } |
| |
| /** |
| * Reads non-proxy class descriptor information from given input stream. |
| * The resulting class descriptor is not fully functional; it can only be |
| * used as input to the ObjectInputStream.resolveClass() and |
| * ObjectStreamClass.initNonProxy() methods. |
| */ |
| void readNonProxy(ObjectInputStream in) |
| throws IOException, ClassNotFoundException |
| { |
| name = in.readUTF(); |
| suid = Long.valueOf(in.readLong()); |
| isProxy = false; |
| |
| byte flags = in.readByte(); |
| hasWriteObjectData = |
| ((flags & ObjectStreamConstants.SC_WRITE_METHOD) != 0); |
| hasBlockExternalData = |
| ((flags & ObjectStreamConstants.SC_BLOCK_DATA) != 0); |
| externalizable = |
| ((flags & ObjectStreamConstants.SC_EXTERNALIZABLE) != 0); |
| boolean sflag = |
| ((flags & ObjectStreamConstants.SC_SERIALIZABLE) != 0); |
| if (externalizable && sflag) { |
| throw new InvalidClassException( |
| name, "serializable and externalizable flags conflict"); |
| } |
| serializable = externalizable || sflag; |
| isEnum = ((flags & ObjectStreamConstants.SC_ENUM) != 0); |
| if (isEnum && suid.longValue() != 0L) { |
| throw new InvalidClassException(name, |
| "enum descriptor has non-zero serialVersionUID: " + suid); |
| } |
| |
| int numFields = in.readShort(); |
| if (isEnum && numFields != 0) { |
| throw new InvalidClassException(name, |
| "enum descriptor has non-zero field count: " + numFields); |
| } |
| fields = (numFields > 0) ? |
| new ObjectStreamField[numFields] : NO_FIELDS; |
| for (int i = 0; i < numFields; i++) { |
| char tcode = (char) in.readByte(); |
| String fname = in.readUTF(); |
| String signature = ((tcode == 'L') || (tcode == '[')) ? |
| in.readTypeString() : new String(new char[] { tcode }); |
| try { |
| fields[i] = new ObjectStreamField(fname, signature, false); |
| } catch (RuntimeException e) { |
| throw (IOException) new InvalidClassException(name, |
| "invalid descriptor for field " + fname).initCause(e); |
| } |
| } |
| computeFieldOffsets(); |
| } |
| |
| /** |
| * Writes non-proxy class descriptor information to given output stream. |
| */ |
| void writeNonProxy(ObjectOutputStream out) throws IOException { |
| out.writeUTF(name); |
| out.writeLong(getSerialVersionUID()); |
| |
| byte flags = 0; |
| if (externalizable) { |
| flags |= ObjectStreamConstants.SC_EXTERNALIZABLE; |
| int protocol = out.getProtocolVersion(); |
| if (protocol != ObjectStreamConstants.PROTOCOL_VERSION_1) { |
| flags |= ObjectStreamConstants.SC_BLOCK_DATA; |
| } |
| } else if (serializable) { |
| flags |= ObjectStreamConstants.SC_SERIALIZABLE; |
| } |
| if (hasWriteObjectData) { |
| flags |= ObjectStreamConstants.SC_WRITE_METHOD; |
| } |
| if (isEnum) { |
| flags |= ObjectStreamConstants.SC_ENUM; |
| } |
| out.writeByte(flags); |
| |
| out.writeShort(fields.length); |
| for (int i = 0; i < fields.length; i++) { |
| ObjectStreamField f = fields[i]; |
| out.writeByte(f.getTypeCode()); |
| out.writeUTF(f.getName()); |
| if (!f.isPrimitive()) { |
| out.writeTypeString(f.getTypeString()); |
| } |
| } |
| } |
| |
| /** |
| * Returns ClassNotFoundException (if any) thrown while attempting to |
| * resolve local class corresponding to this class descriptor. |
| */ |
| ClassNotFoundException getResolveException() { |
| return resolveEx; |
| } |
| |
| /** |
| * Throws InternalError if not initialized. |
| */ |
| private final void requireInitialized() { |
| if (!initialized) |
| throw new InternalError("Unexpected call when not initialized"); |
| } |
| |
| /** |
| * Throws an InvalidClassException if object instances referencing this |
| * class descriptor should not be allowed to deserialize. This method does |
| * not apply to deserialization of enum constants. |
| */ |
| void checkDeserialize() throws InvalidClassException { |
| requireInitialized(); |
| if (deserializeEx != null) { |
| throw deserializeEx.newInvalidClassException(); |
| } |
| } |
| |
| /** |
| * Throws an InvalidClassException if objects whose class is represented by |
| * this descriptor should not be allowed to serialize. This method does |
| * not apply to serialization of enum constants. |
| */ |
| void checkSerialize() throws InvalidClassException { |
| requireInitialized(); |
| if (serializeEx != null) { |
| throw serializeEx.newInvalidClassException(); |
| } |
| } |
| |
| /** |
| * Throws an InvalidClassException if objects whose class is represented by |
| * this descriptor should not be permitted to use default serialization |
| * (e.g., if the class declares serializable fields that do not correspond |
| * to actual fields, and hence must use the GetField API). This method |
| * does not apply to deserialization of enum constants. |
| */ |
| void checkDefaultSerialize() throws InvalidClassException { |
| requireInitialized(); |
| if (defaultSerializeEx != null) { |
| throw defaultSerializeEx.newInvalidClassException(); |
| } |
| } |
| |
| /** |
| * Returns superclass descriptor. Note that on the receiving side, the |
| * superclass descriptor may be bound to a class that is not a superclass |
| * of the subclass descriptor's bound class. |
| */ |
| ObjectStreamClass getSuperDesc() { |
| requireInitialized(); |
| return superDesc; |
| } |
| |
| /** |
| * Returns the "local" class descriptor for the class associated with this |
| * class descriptor (i.e., the result of |
| * ObjectStreamClass.lookup(this.forClass())) or null if there is no class |
| * associated with this descriptor. |
| */ |
| ObjectStreamClass getLocalDesc() { |
| requireInitialized(); |
| return localDesc; |
| } |
| |
| /** |
| * Returns arrays of ObjectStreamFields representing the serializable |
| * fields of the represented class. If copy is true, a clone of this class |
| * descriptor's field array is returned, otherwise the array itself is |
| * returned. |
| */ |
| ObjectStreamField[] getFields(boolean copy) { |
| return copy ? fields.clone() : fields; |
| } |
| |
| /** |
| * Looks up a serializable field of the represented class by name and type. |
| * A specified type of null matches all types, Object.class matches all |
| * non-primitive types, and any other non-null type matches assignable |
| * types only. Returns matching field, or null if no match found. |
| */ |
| ObjectStreamField getField(String name, Class<?> type) { |
| for (int i = 0; i < fields.length; i++) { |
| ObjectStreamField f = fields[i]; |
| if (f.getName().equals(name)) { |
| if (type == null || |
| (type == Object.class && !f.isPrimitive())) |
| { |
| return f; |
| } |
| Class<?> ftype = f.getType(); |
| if (ftype != null && type.isAssignableFrom(ftype)) { |
| return f; |
| } |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Returns true if class descriptor represents a dynamic proxy class, false |
| * otherwise. |
| */ |
| boolean isProxy() { |
| requireInitialized(); |
| return isProxy; |
| } |
| |
| /** |
| * Returns true if class descriptor represents an enum type, false |
| * otherwise. |
| */ |
| boolean isEnum() { |
| requireInitialized(); |
| return isEnum; |
| } |
| |
| /** |
| * Returns true if represented class implements Externalizable, false |
| * otherwise. |
| */ |
| boolean isExternalizable() { |
| requireInitialized(); |
| return externalizable; |
| } |
| |
| /** |
| * Returns true if represented class implements Serializable, false |
| * otherwise. |
| */ |
| boolean isSerializable() { |
| requireInitialized(); |
| return serializable; |
| } |
| |
| /** |
| * Returns true if class descriptor represents externalizable class that |
| * has written its data in 1.2 (block data) format, false otherwise. |
| */ |
| boolean hasBlockExternalData() { |
| requireInitialized(); |
| return hasBlockExternalData; |
| } |
| |
| /** |
| * Returns true if class descriptor represents serializable (but not |
| * externalizable) class which has written its data via a custom |
| * writeObject() method, false otherwise. |
| */ |
| boolean hasWriteObjectData() { |
| requireInitialized(); |
| return hasWriteObjectData; |
| } |
| |
| /** |
| * Returns true if represented class is serializable/externalizable and can |
| * be instantiated by the serialization runtime--i.e., if it is |
| * externalizable and defines a public no-arg constructor, or if it is |
| * non-externalizable and its first non-serializable superclass defines an |
| * accessible no-arg constructor. Otherwise, returns false. |
| */ |
| boolean isInstantiable() { |
| requireInitialized(); |
| return (cons != null); |
| } |
| |
| /** |
| * Returns true if represented class is serializable (but not |
| * externalizable) and defines a conformant writeObject method. Otherwise, |
| * returns false. |
| */ |
| boolean hasWriteObjectMethod() { |
| requireInitialized(); |
| return (writeObjectMethod != null); |
| } |
| |
| /** |
| * Returns true if represented class is serializable (but not |
| * externalizable) and defines a conformant readObject method. Otherwise, |
| * returns false. |
| */ |
| boolean hasReadObjectMethod() { |
| requireInitialized(); |
| return (readObjectMethod != null); |
| } |
| |
| /** |
| * Returns true if represented class is serializable (but not |
| * externalizable) and defines a conformant readObjectNoData method. |
| * Otherwise, returns false. |
| */ |
| boolean hasReadObjectNoDataMethod() { |
| requireInitialized(); |
| return (readObjectNoDataMethod != null); |
| } |
| |
| /** |
| * Returns true if represented class is serializable or externalizable and |
| * defines a conformant writeReplace method. Otherwise, returns false. |
| */ |
| boolean hasWriteReplaceMethod() { |
| requireInitialized(); |
| return (writeReplaceMethod != null); |
| } |
| |
| /** |
| * Returns true if represented class is serializable or externalizable and |
| * defines a conformant readResolve method. Otherwise, returns false. |
| */ |
| boolean hasReadResolveMethod() { |
| requireInitialized(); |
| return (readResolveMethod != null); |
| } |
| |
| /** |
| * Creates a new instance of the represented class. If the class is |
| * externalizable, invokes its public no-arg constructor; otherwise, if the |
| * class is serializable, invokes the no-arg constructor of the first |
| * non-serializable superclass. Throws UnsupportedOperationException if |
| * this class descriptor is not associated with a class, if the associated |
| * class is non-serializable or if the appropriate no-arg constructor is |
| * inaccessible/unavailable. |
| */ |
| Object newInstance() |
| throws InstantiationException, InvocationTargetException, |
| UnsupportedOperationException |
| { |
| requireInitialized(); |
| if (cons != null) { |
| try { |
| return cons.newInstance(); |
| } catch (IllegalAccessException ex) { |
| // should not occur, as access checks have been suppressed |
| throw new InternalError(ex); |
| } |
| } else { |
| throw new UnsupportedOperationException(); |
| } |
| } |
| |
| /** |
| * Invokes the writeObject method of the represented serializable class. |
| * Throws UnsupportedOperationException if this class descriptor is not |
| * associated with a class, or if the class is externalizable, |
| * non-serializable or does not define writeObject. |
| */ |
| void invokeWriteObject(Object obj, ObjectOutputStream out) |
| throws IOException, UnsupportedOperationException |
| { |
| requireInitialized(); |
| if (writeObjectMethod != null) { |
| try { |
| writeObjectMethod.invoke(obj, new Object[]{ out }); |
| } catch (InvocationTargetException ex) { |
| Throwable th = ex.getTargetException(); |
| if (th instanceof IOException) { |
| throw (IOException) th; |
| } else { |
| throwMiscException(th); |
| } |
| } catch (IllegalAccessException ex) { |
| // should not occur, as access checks have been suppressed |
| throw new InternalError(ex); |
| } |
| } else { |
| throw new UnsupportedOperationException(); |
| } |
| } |
| |
| /** |
| * Invokes the readObject method of the represented serializable class. |
| * Throws UnsupportedOperationException if this class descriptor is not |
| * associated with a class, or if the class is externalizable, |
| * non-serializable or does not define readObject. |
| */ |
| void invokeReadObject(Object obj, ObjectInputStream in) |
| throws ClassNotFoundException, IOException, |
| UnsupportedOperationException |
| { |
| requireInitialized(); |
| if (readObjectMethod != null) { |
| try { |
| readObjectMethod.invoke(obj, new Object[]{ in }); |
| } catch (InvocationTargetException ex) { |
| Throwable th = ex.getTargetException(); |
| if (th instanceof ClassNotFoundException) { |
| throw (ClassNotFoundException) th; |
| } else if (th instanceof IOException) { |
| throw (IOException) th; |
| } else { |
| throwMiscException(th); |
| } |
| } catch (IllegalAccessException ex) { |
| // should not occur, as access checks have been suppressed |
| throw new InternalError(ex); |
| } |
| } else { |
| throw new UnsupportedOperationException(); |
| } |
| } |
| |
| /** |
| * Invokes the readObjectNoData method of the represented serializable |
| * class. Throws UnsupportedOperationException if this class descriptor is |
| * not associated with a class, or if the class is externalizable, |
| * non-serializable or does not define readObjectNoData. |
| */ |
| void invokeReadObjectNoData(Object obj) |
| throws IOException, UnsupportedOperationException |
| { |
| requireInitialized(); |
| if (readObjectNoDataMethod != null) { |
| try { |
| readObjectNoDataMethod.invoke(obj, (Object[]) null); |
| } catch (InvocationTargetException ex) { |
| Throwable th = ex.getTargetException(); |
| if (th instanceof ObjectStreamException) { |
| throw (ObjectStreamException) th; |
| } else { |
| throwMiscException(th); |
| } |
| } catch (IllegalAccessException ex) { |
| // should not occur, as access checks have been suppressed |
| throw new InternalError(ex); |
| } |
| } else { |
| throw new UnsupportedOperationException(); |
| } |
| } |
| |
| /** |
| * Invokes the writeReplace method of the represented serializable class and |
| * returns the result. Throws UnsupportedOperationException if this class |
| * descriptor is not associated with a class, or if the class is |
| * non-serializable or does not define writeReplace. |
| */ |
| Object invokeWriteReplace(Object obj) |
| throws IOException, UnsupportedOperationException |
| { |
| requireInitialized(); |
| if (writeReplaceMethod != null) { |
| try { |
| return writeReplaceMethod.invoke(obj, (Object[]) null); |
| } catch (InvocationTargetException ex) { |
| Throwable th = ex.getTargetException(); |
| if (th instanceof ObjectStreamException) { |
| throw (ObjectStreamException) th; |
| } else { |
| throwMiscException(th); |
| throw new InternalError(th); // never reached |
| } |
| } catch (IllegalAccessException ex) { |
| // should not occur, as access checks have been suppressed |
| throw new InternalError(ex); |
| } |
| } else { |
| throw new UnsupportedOperationException(); |
| } |
| } |
| |
| /** |
| * Invokes the readResolve method of the represented serializable class and |
| * returns the result. Throws UnsupportedOperationException if this class |
| * descriptor is not associated with a class, or if the class is |
| * non-serializable or does not define readResolve. |
| */ |
| Object invokeReadResolve(Object obj) |
| throws IOException, UnsupportedOperationException |
| { |
| requireInitialized(); |
| if (readResolveMethod != null) { |
| try { |
| return readResolveMethod.invoke(obj, (Object[]) null); |
| } catch (InvocationTargetException ex) { |
| Throwable th = ex.getTargetException(); |
| if (th instanceof ObjectStreamException) { |
| throw (ObjectStreamException) th; |
| } else { |
| throwMiscException(th); |
| throw new InternalError(th); // never reached |
| } |
| } catch (IllegalAccessException ex) { |
| // should not occur, as access checks have been suppressed |
| throw new InternalError(ex); |
| } |
| } else { |
| throw new UnsupportedOperationException(); |
| } |
| } |
| |
| /** |
| * Class representing the portion of an object's serialized form allotted |
| * to data described by a given class descriptor. If "hasData" is false, |
| * the object's serialized form does not contain data associated with the |
| * class descriptor. |
| */ |
| static class ClassDataSlot { |
| |
| /** class descriptor "occupying" this slot */ |
| final ObjectStreamClass desc; |
| /** true if serialized form includes data for this slot's descriptor */ |
| final boolean hasData; |
| |
| ClassDataSlot(ObjectStreamClass desc, boolean hasData) { |
| this.desc = desc; |
| this.hasData = hasData; |
| } |
| } |
| |
| /** |
| * Returns array of ClassDataSlot instances representing the data layout |
| * (including superclass data) for serialized objects described by this |
| * class descriptor. ClassDataSlots are ordered by inheritance with those |
| * containing "higher" superclasses appearing first. The final |
| * ClassDataSlot contains a reference to this descriptor. |
| */ |
| ClassDataSlot[] getClassDataLayout() throws InvalidClassException { |
| // REMIND: synchronize instead of relying on volatile? |
| if (dataLayout == null) { |
| dataLayout = getClassDataLayout0(); |
| } |
| return dataLayout; |
| } |
| |
| private ClassDataSlot[] getClassDataLayout0() |
| throws InvalidClassException |
| { |
| ArrayList<ClassDataSlot> slots = new ArrayList<>(); |
| Class<?> start = cl, end = cl; |
| |
| // locate closest non-serializable superclass |
| while (end != null && Serializable.class.isAssignableFrom(end)) { |
| end = end.getSuperclass(); |
| } |
| |
| HashSet<String> oscNames = new HashSet<>(3); |
| |
| for (ObjectStreamClass d = this; d != null; d = d.superDesc) { |
| if (oscNames.contains(d.name)) { |
| throw new InvalidClassException("Circular reference."); |
| } else { |
| oscNames.add(d.name); |
| } |
| |
| // search up inheritance hierarchy for class with matching name |
| String searchName = (d.cl != null) ? d.cl.getName() : d.name; |
| Class<?> match = null; |
| for (Class<?> c = start; c != end; c = c.getSuperclass()) { |
| if (searchName.equals(c.getName())) { |
| match = c; |
| break; |
| } |
| } |
| |
| // add "no data" slot for each unmatched class below match |
| if (match != null) { |
| for (Class<?> c = start; c != match; c = c.getSuperclass()) { |
| slots.add(new ClassDataSlot( |
| ObjectStreamClass.lookup(c, true), false)); |
| } |
| start = match.getSuperclass(); |
| } |
| |
| // record descriptor/class pairing |
| slots.add(new ClassDataSlot(d.getVariantFor(match), true)); |
| } |
| |
| // add "no data" slot for any leftover unmatched classes |
| for (Class<?> c = start; c != end; c = c.getSuperclass()) { |
| slots.add(new ClassDataSlot( |
| ObjectStreamClass.lookup(c, true), false)); |
| } |
| |
| // order slots from superclass -> subclass |
| Collections.reverse(slots); |
| return slots.toArray(new ClassDataSlot[slots.size()]); |
| } |
| |
| /** |
| * Returns aggregate size (in bytes) of marshalled primitive field values |
| * for represented class. |
| */ |
| int getPrimDataSize() { |
| return primDataSize; |
| } |
| |
| /** |
| * Returns number of non-primitive serializable fields of represented |
| * class. |
| */ |
| int getNumObjFields() { |
| return numObjFields; |
| } |
| |
| /** |
| * Fetches the serializable primitive field values of object obj and |
| * marshals them into byte array buf starting at offset 0. It is the |
| * responsibility of the caller to ensure that obj is of the proper type if |
| * non-null. |
| */ |
| void getPrimFieldValues(Object obj, byte[] buf) { |
| fieldRefl.getPrimFieldValues(obj, buf); |
| } |
| |
| /** |
| * Sets the serializable primitive fields of object obj using values |
| * unmarshalled from byte array buf starting at offset 0. It is the |
| * responsibility of the caller to ensure that obj is of the proper type if |
| * non-null. |
| */ |
| void setPrimFieldValues(Object obj, byte[] buf) { |
| fieldRefl.setPrimFieldValues(obj, buf); |
| } |
| |
| /** |
| * Fetches the serializable object field values of object obj and stores |
| * them in array vals starting at offset 0. It is the responsibility of |
| * the caller to ensure that obj is of the proper type if non-null. |
| */ |
| void getObjFieldValues(Object obj, Object[] vals) { |
| fieldRefl.getObjFieldValues(obj, vals); |
| } |
| |
| /** |
| * Checks that the given values, from array vals starting at offset 0, |
| * are assignable to the given serializable object fields. |
| * @throws ClassCastException if any value is not assignable |
| */ |
| void checkObjFieldValueTypes(Object obj, Object[] vals) { |
| fieldRefl.checkObjectFieldValueTypes(obj, vals); |
| } |
| |
| /** |
| * Sets the serializable object fields of object obj using values from |
| * array vals starting at offset 0. It is the responsibility of the caller |
| * to ensure that obj is of the proper type if non-null. |
| */ |
| void setObjFieldValues(Object obj, Object[] vals) { |
| fieldRefl.setObjFieldValues(obj, vals); |
| } |
| |
| /** |
| * Calculates and sets serializable field offsets, as well as primitive |
| * data size and object field count totals. Throws InvalidClassException |
| * if fields are illegally ordered. |
| */ |
| private void computeFieldOffsets() throws InvalidClassException { |
| primDataSize = 0; |
| numObjFields = 0; |
| int firstObjIndex = -1; |
| |
| for (int i = 0; i < fields.length; i++) { |
| ObjectStreamField f = fields[i]; |
| switch (f.getTypeCode()) { |
| case 'Z': |
| case 'B': |
| f.setOffset(primDataSize++); |
| break; |
| |
| case 'C': |
| case 'S': |
| f.setOffset(primDataSize); |
| primDataSize += 2; |
| break; |
| |
| case 'I': |
| case 'F': |
| f.setOffset(primDataSize); |
| primDataSize += 4; |
| break; |
| |
| case 'J': |
| case 'D': |
| f.setOffset(primDataSize); |
| primDataSize += 8; |
| break; |
| |
| case '[': |
| case 'L': |
| f.setOffset(numObjFields++); |
| if (firstObjIndex == -1) { |
| firstObjIndex = i; |
| } |
| break; |
| |
| default: |
| throw new InternalError(); |
| } |
| } |
| if (firstObjIndex != -1 && |
| firstObjIndex + numObjFields != fields.length) |
| { |
| throw new InvalidClassException(name, "illegal field order"); |
| } |
| } |
| |
| /** |
| * If given class is the same as the class associated with this class |
| * descriptor, returns reference to this class descriptor. Otherwise, |
| * returns variant of this class descriptor bound to given class. |
| */ |
| private ObjectStreamClass getVariantFor(Class<?> cl) |
| throws InvalidClassException |
| { |
| if (this.cl == cl) { |
| return this; |
| } |
| ObjectStreamClass desc = new ObjectStreamClass(); |
| if (isProxy) { |
| desc.initProxy(cl, null, superDesc); |
| } else { |
| desc.initNonProxy(this, cl, null, superDesc); |
| } |
| return desc; |
| } |
| |
| /** |
| * Returns public no-arg constructor of given class, or null if none found. |
| * Access checks are disabled on the returned constructor (if any), since |
| * the defining class may still be non-public. |
| */ |
| private static Constructor<?> getExternalizableConstructor(Class<?> cl) { |
| try { |
| Constructor<?> cons = cl.getDeclaredConstructor((Class<?>[]) null); |
| cons.setAccessible(true); |
| return ((cons.getModifiers() & Modifier.PUBLIC) != 0) ? |
| cons : null; |
| } catch (NoSuchMethodException ex) { |
| return null; |
| } |
| } |
| |
| /** |
| * Returns subclass-accessible no-arg constructor of first non-serializable |
| * superclass, or null if none found. Access checks are disabled on the |
| * returned constructor (if any). |
| */ |
| private static Constructor<?> getSerializableConstructor(Class<?> cl) { |
| Class<?> initCl = cl; |
| while (Serializable.class.isAssignableFrom(initCl)) { |
| if ((initCl = initCl.getSuperclass()) == null) { |
| return null; |
| } |
| } |
| try { |
| Constructor<?> cons = initCl.getDeclaredConstructor((Class<?>[]) null); |
| int mods = cons.getModifiers(); |
| if ((mods & Modifier.PRIVATE) != 0 || |
| ((mods & (Modifier.PUBLIC | Modifier.PROTECTED)) == 0 && |
| !packageEquals(cl, initCl))) |
| { |
| return null; |
| } |
| cons = reflFactory.newConstructorForSerialization(cl, cons); |
| cons.setAccessible(true); |
| return cons; |
| } catch (NoSuchMethodException ex) { |
| return null; |
| } |
| } |
| |
| /** |
| * Returns non-static, non-abstract method with given signature provided it |
| * is defined by or accessible (via inheritance) by the given class, or |
| * null if no match found. Access checks are disabled on the returned |
| * method (if any). |
| */ |
| private static Method getInheritableMethod(Class<?> cl, String name, |
| Class<?>[] argTypes, |
| Class<?> returnType) |
| { |
| Method meth = null; |
| Class<?> defCl = cl; |
| while (defCl != null) { |
| try { |
| meth = defCl.getDeclaredMethod(name, argTypes); |
| break; |
| } catch (NoSuchMethodException ex) { |
| defCl = defCl.getSuperclass(); |
| } |
| } |
| |
| if ((meth == null) || (meth.getReturnType() != returnType)) { |
| return null; |
| } |
| meth.setAccessible(true); |
| int mods = meth.getModifiers(); |
| if ((mods & (Modifier.STATIC | Modifier.ABSTRACT)) != 0) { |
| return null; |
| } else if ((mods & (Modifier.PUBLIC | Modifier.PROTECTED)) != 0) { |
| return meth; |
| } else if ((mods & Modifier.PRIVATE) != 0) { |
| return (cl == defCl) ? meth : null; |
| } else { |
| return packageEquals(cl, defCl) ? meth : null; |
| } |
| } |
| |
| /** |
| * Returns non-static private method with given signature defined by given |
| * class, or null if none found. Access checks are disabled on the |
| * returned method (if any). |
| */ |
| private static Method getPrivateMethod(Class<?> cl, String name, |
| Class<?>[] argTypes, |
| Class<?> returnType) |
| { |
| try { |
| Method meth = cl.getDeclaredMethod(name, argTypes); |
| meth.setAccessible(true); |
| int mods = meth.getModifiers(); |
| return ((meth.getReturnType() == returnType) && |
| ((mods & Modifier.STATIC) == 0) && |
| ((mods & Modifier.PRIVATE) != 0)) ? meth : null; |
| } catch (NoSuchMethodException ex) { |
| return null; |
| } |
| } |
| |
| /** |
| * Returns true if classes are defined in the same runtime package, false |
| * otherwise. |
| */ |
| private static boolean packageEquals(Class<?> cl1, Class<?> cl2) { |
| return (cl1.getClassLoader() == cl2.getClassLoader() && |
| getPackageName(cl1).equals(getPackageName(cl2))); |
| } |
| |
| /** |
| * Returns package name of given class. |
| */ |
| private static String getPackageName(Class<?> cl) { |
| String s = cl.getName(); |
| int i = s.lastIndexOf('['); |
| if (i >= 0) { |
| s = s.substring(i + 2); |
| } |
| i = s.lastIndexOf('.'); |
| return (i >= 0) ? s.substring(0, i) : ""; |
| } |
| |
| /** |
| * Compares class names for equality, ignoring package names. Returns true |
| * if class names equal, false otherwise. |
| */ |
| private static boolean classNamesEqual(String name1, String name2) { |
| int idx1 = name1.lastIndexOf('.') + 1; |
| int idx2 = name2.lastIndexOf('.') + 1; |
| int len1 = name1.length() - idx1; |
| int len2 = name2.length() - idx2; |
| return len1 == len2 && |
| name1.regionMatches(idx1, name2, idx2, len1); |
| } |
| |
| /** |
| * Returns JVM type signature for given list of parameters and return type. |
| */ |
| private static String getMethodSignature(Class<?>[] paramTypes, |
| Class<?> retType) |
| { |
| StringBuilder sbuf = new StringBuilder(); |
| sbuf.append('('); |
| for (int i = 0; i < paramTypes.length; i++) { |
| appendClassSignature(sbuf, paramTypes[i]); |
| } |
| sbuf.append(')'); |
| appendClassSignature(sbuf, retType); |
| return sbuf.toString(); |
| } |
| |
| /** |
| * Convenience method for throwing an exception that is either a |
| * RuntimeException, Error, or of some unexpected type (in which case it is |
| * wrapped inside an IOException). |
| */ |
| private static void throwMiscException(Throwable th) throws IOException { |
| if (th instanceof RuntimeException) { |
| throw (RuntimeException) th; |
| } else if (th instanceof Error) { |
| throw (Error) th; |
| } else { |
| IOException ex = new IOException("unexpected exception type"); |
| ex.initCause(th); |
| throw ex; |
| } |
| } |
| |
| /** |
| * Returns ObjectStreamField array describing the serializable fields of |
| * the given class. Serializable fields backed by an actual field of the |
| * class are represented by ObjectStreamFields with corresponding non-null |
| * Field objects. Throws InvalidClassException if the (explicitly |
| * declared) serializable fields are invalid. |
| */ |
| private static ObjectStreamField[] getSerialFields(Class<?> cl) |
| throws InvalidClassException |
| { |
| ObjectStreamField[] fields; |
| if (Serializable.class.isAssignableFrom(cl) && |
| !Externalizable.class.isAssignableFrom(cl) && |
| !Proxy.isProxyClass(cl) && |
| !cl.isInterface()) |
| { |
| if ((fields = getDeclaredSerialFields(cl)) == null) { |
| fields = getDefaultSerialFields(cl); |
| } |
| Arrays.sort(fields); |
| } else { |
| fields = NO_FIELDS; |
| } |
| return fields; |
| } |
| |
| /** |
| * Returns serializable fields of given class as defined explicitly by a |
| * "serialPersistentFields" field, or null if no appropriate |
| * "serialPersistentFields" field is defined. Serializable fields backed |
| * by an actual field of the class are represented by ObjectStreamFields |
| * with corresponding non-null Field objects. For compatibility with past |
| * releases, a "serialPersistentFields" field with a null value is |
| * considered equivalent to not declaring "serialPersistentFields". Throws |
| * InvalidClassException if the declared serializable fields are |
| * invalid--e.g., if multiple fields share the same name. |
| */ |
| private static ObjectStreamField[] getDeclaredSerialFields(Class<?> cl) |
| throws InvalidClassException |
| { |
| ObjectStreamField[] serialPersistentFields = null; |
| try { |
| Field f = cl.getDeclaredField("serialPersistentFields"); |
| int mask = Modifier.PRIVATE | Modifier.STATIC | Modifier.FINAL; |
| if ((f.getModifiers() & mask) == mask) { |
| f.setAccessible(true); |
| serialPersistentFields = (ObjectStreamField[]) f.get(null); |
| } |
| } catch (Exception ex) { |
| } |
| if (serialPersistentFields == null) { |
| return null; |
| } else if (serialPersistentFields.length == 0) { |
| return NO_FIELDS; |
| } |
| |
| ObjectStreamField[] boundFields = |
| new ObjectStreamField[serialPersistentFields.length]; |
| Set<String> fieldNames = new HashSet<>(serialPersistentFields.length); |
| |
| for (int i = 0; i < serialPersistentFields.length; i++) { |
| ObjectStreamField spf = serialPersistentFields[i]; |
| |
| String fname = spf.getName(); |
| if (fieldNames.contains(fname)) { |
| throw new InvalidClassException( |
| "multiple serializable fields named " + fname); |
| } |
| fieldNames.add(fname); |
| |
| try { |
| Field f = cl.getDeclaredField(fname); |
| if ((f.getType() == spf.getType()) && |
| ((f.getModifiers() & Modifier.STATIC) == 0)) |
| { |
| boundFields[i] = |
| new ObjectStreamField(f, spf.isUnshared(), true); |
| } |
| } catch (NoSuchFieldException ex) { |
| } |
| if (boundFields[i] == null) { |
| boundFields[i] = new ObjectStreamField( |
| fname, spf.getType(), spf.isUnshared()); |
| } |
| } |
| return boundFields; |
| } |
| |
| /** |
| * Returns array of ObjectStreamFields corresponding to all non-static |
| * non-transient fields declared by given class. Each ObjectStreamField |
| * contains a Field object for the field it represents. If no default |
| * serializable fields exist, NO_FIELDS is returned. |
| */ |
| private static ObjectStreamField[] getDefaultSerialFields(Class<?> cl) { |
| Field[] clFields = cl.getDeclaredFields(); |
| ArrayList<ObjectStreamField> list = new ArrayList<>(); |
| int mask = Modifier.STATIC | Modifier.TRANSIENT; |
| |
| for (int i = 0; i < clFields.length; i++) { |
| if ((clFields[i].getModifiers() & mask) == 0) { |
| list.add(new ObjectStreamField(clFields[i], false, true)); |
| } |
| } |
| int size = list.size(); |
| return (size == 0) ? NO_FIELDS : |
| list.toArray(new ObjectStreamField[size]); |
| } |
| |
| /** |
| * Returns explicit serial version UID value declared by given class, or |
| * null if none. |
| */ |
| private static Long getDeclaredSUID(Class<?> cl) { |
| try { |
| Field f = cl.getDeclaredField("serialVersionUID"); |
| int mask = Modifier.STATIC | Modifier.FINAL; |
| if ((f.getModifiers() & mask) == mask) { |
| f.setAccessible(true); |
| return Long.valueOf(f.getLong(null)); |
| } |
| } catch (Exception ex) { |
| } |
| return null; |
| } |
| |
| /** |
| * Computes the default serial version UID value for the given class. |
| */ |
| private static long computeDefaultSUID(Class<?> cl) { |
| if (!Serializable.class.isAssignableFrom(cl) || Proxy.isProxyClass(cl)) |
| { |
| return 0L; |
| } |
| |
| try { |
| ByteArrayOutputStream bout = new ByteArrayOutputStream(); |
| DataOutputStream dout = new DataOutputStream(bout); |
| |
| dout.writeUTF(cl.getName()); |
| |
| int classMods = cl.getModifiers() & |
| (Modifier.PUBLIC | Modifier.FINAL | |
| Modifier.INTERFACE | Modifier.ABSTRACT); |
| |
| /* |
| * compensate for javac bug in which ABSTRACT bit was set for an |
| * interface only if the interface declared methods |
| */ |
| Method[] methods = cl.getDeclaredMethods(); |
| if ((classMods & Modifier.INTERFACE) != 0) { |
| classMods = (methods.length > 0) ? |
| (classMods | Modifier.ABSTRACT) : |
| (classMods & ~Modifier.ABSTRACT); |
| } |
| dout.writeInt(classMods); |
| |
| if (!cl.isArray()) { |
| /* |
| * compensate for change in 1.2FCS in which |
| * Class.getInterfaces() was modified to return Cloneable and |
| * Serializable for array classes. |
| */ |
| Class<?>[] interfaces = cl.getInterfaces(); |
| String[] ifaceNames = new String[interfaces.length]; |
| for (int i = 0; i < interfaces.length; i++) { |
| ifaceNames[i] = interfaces[i].getName(); |
| } |
| Arrays.sort(ifaceNames); |
| for (int i = 0; i < ifaceNames.length; i++) { |
| dout.writeUTF(ifaceNames[i]); |
| } |
| } |
| |
| Field[] fields = cl.getDeclaredFields(); |
| MemberSignature[] fieldSigs = new MemberSignature[fields.length]; |
| for (int i = 0; i < fields.length; i++) { |
| fieldSigs[i] = new MemberSignature(fields[i]); |
| } |
| Arrays.sort(fieldSigs, new Comparator<>() { |
| public int compare(MemberSignature ms1, MemberSignature ms2) { |
| return ms1.name.compareTo(ms2.name); |
| } |
| }); |
| for (int i = 0; i < fieldSigs.length; i++) { |
| MemberSignature sig = fieldSigs[i]; |
| int mods = sig.member.getModifiers() & |
| (Modifier.PUBLIC | Modifier.PRIVATE | Modifier.PROTECTED | |
| Modifier.STATIC | Modifier.FINAL | Modifier.VOLATILE | |
| Modifier.TRANSIENT); |
| if (((mods & Modifier.PRIVATE) == 0) || |
| ((mods & (Modifier.STATIC | Modifier.TRANSIENT)) == 0)) |
| { |
| dout.writeUTF(sig.name); |
| dout.writeInt(mods); |
| dout.writeUTF(sig.signature); |
| } |
| } |
| |
| if (hasStaticInitializer(cl)) { |
| dout.writeUTF("<clinit>"); |
| dout.writeInt(Modifier.STATIC); |
| dout.writeUTF("()V"); |
| } |
| |
| Constructor<?>[] cons = cl.getDeclaredConstructors(); |
| MemberSignature[] consSigs = new MemberSignature[cons.length]; |
| for (int i = 0; i < cons.length; i++) { |
| consSigs[i] = new MemberSignature(cons[i]); |
| } |
| Arrays.sort(consSigs, new Comparator<>() { |
| public int compare(MemberSignature ms1, MemberSignature ms2) { |
| return ms1.signature.compareTo(ms2.signature); |
| } |
| }); |
| for (int i = 0; i < consSigs.length; i++) { |
| MemberSignature sig = consSigs[i]; |
| int mods = sig.member.getModifiers() & |
| (Modifier.PUBLIC | Modifier.PRIVATE | Modifier.PROTECTED | |
| Modifier.STATIC | Modifier.FINAL | |
| Modifier.SYNCHRONIZED | Modifier.NATIVE | |
| Modifier.ABSTRACT | Modifier.STRICT); |
| if ((mods & Modifier.PRIVATE) == 0) { |
| dout.writeUTF("<init>"); |
| dout.writeInt(mods); |
| dout.writeUTF(sig.signature.replace('/', '.')); |
| } |
| } |
| |
| MemberSignature[] methSigs = new MemberSignature[methods.length]; |
| for (int i = 0; i < methods.length; i++) { |
| methSigs[i] = new MemberSignature(methods[i]); |
| } |
| Arrays.sort(methSigs, new Comparator<>() { |
| public int compare(MemberSignature ms1, MemberSignature ms2) { |
| int comp = ms1.name.compareTo(ms2.name); |
| if (comp == 0) { |
| comp = ms1.signature.compareTo(ms2.signature); |
| } |
| return comp; |
| } |
| }); |
| for (int i = 0; i < methSigs.length; i++) { |
| MemberSignature sig = methSigs[i]; |
| int mods = sig.member.getModifiers() & |
| (Modifier.PUBLIC | Modifier.PRIVATE | Modifier.PROTECTED | |
| Modifier.STATIC | Modifier.FINAL | |
| Modifier.SYNCHRONIZED | Modifier.NATIVE | |
| Modifier.ABSTRACT | Modifier.STRICT); |
| if ((mods & Modifier.PRIVATE) == 0) { |
| dout.writeUTF(sig.name); |
| dout.writeInt(mods); |
| dout.writeUTF(sig.signature.replace('/', '.')); |
| } |
| } |
| |
| dout.flush(); |
| |
| MessageDigest md = MessageDigest.getInstance("SHA"); |
| byte[] hashBytes = md.digest(bout.toByteArray()); |
| long hash = 0; |
| for (int i = Math.min(hashBytes.length, 8) - 1; i >= 0; i--) { |
| hash = (hash << 8) | (hashBytes[i] & 0xFF); |
| } |
| return hash; |
| } catch (IOException ex) { |
| throw new InternalError(ex); |
| } catch (NoSuchAlgorithmException ex) { |
| throw new SecurityException(ex.getMessage()); |
| } |
| } |
| |
| /** |
| * Returns true if the given class defines a static initializer method, |
| * false otherwise. |
| */ |
| private static native boolean hasStaticInitializer(Class<?> cl); |
| |
| /** |
| * Class for computing and caching field/constructor/method signatures |
| * during serialVersionUID calculation. |
| */ |
| private static class MemberSignature { |
| |
| public final Member member; |
| public final String name; |
| public final String signature; |
| |
| public MemberSignature(Field field) { |
| member = field; |
| name = field.getName(); |
| signature = getClassSignature(field.getType()); |
| } |
| |
| public MemberSignature(Constructor<?> cons) { |
| member = cons; |
| name = cons.getName(); |
| signature = getMethodSignature( |
| cons.getParameterTypes(), Void.TYPE); |
| } |
| |
| public MemberSignature(Method meth) { |
| member = meth; |
| name = meth.getName(); |
| signature = getMethodSignature( |
| meth.getParameterTypes(), meth.getReturnType()); |
| } |
| } |
| |
| /** |
| * Class for setting and retrieving serializable field values in batch. |
| */ |
| // REMIND: dynamically generate these? |
| private static class FieldReflector { |
| |
| /** handle for performing unsafe operations */ |
| private static final Unsafe unsafe = Unsafe.getUnsafe(); |
| |
| /** fields to operate on */ |
| private final ObjectStreamField[] fields; |
| /** number of primitive fields */ |
| private final int numPrimFields; |
| /** unsafe field keys for reading fields - may contain dupes */ |
| private final long[] readKeys; |
| /** unsafe fields keys for writing fields - no dupes */ |
| private final long[] writeKeys; |
| /** field data offsets */ |
| private final int[] offsets; |
| /** field type codes */ |
| private final char[] typeCodes; |
| /** field types */ |
| private final Class<?>[] types; |
| |
| /** |
| * Constructs FieldReflector capable of setting/getting values from the |
| * subset of fields whose ObjectStreamFields contain non-null |
| * reflective Field objects. ObjectStreamFields with null Fields are |
| * treated as filler, for which get operations return default values |
| * and set operations discard given values. |
| */ |
| FieldReflector(ObjectStreamField[] fields) { |
| this.fields = fields; |
| int nfields = fields.length; |
| readKeys = new long[nfields]; |
| writeKeys = new long[nfields]; |
| offsets = new int[nfields]; |
| typeCodes = new char[nfields]; |
| ArrayList<Class<?>> typeList = new ArrayList<>(); |
| Set<Long> usedKeys = new HashSet<>(); |
| |
| |
| for (int i = 0; i < nfields; i++) { |
| ObjectStreamField f = fields[i]; |
| Field rf = f.getField(); |
| long key = (rf != null) ? |
| unsafe.objectFieldOffset(rf) : Unsafe.INVALID_FIELD_OFFSET; |
| readKeys[i] = key; |
| writeKeys[i] = usedKeys.add(key) ? |
| key : Unsafe.INVALID_FIELD_OFFSET; |
| offsets[i] = f.getOffset(); |
| typeCodes[i] = f.getTypeCode(); |
| if (!f.isPrimitive()) { |
| typeList.add((rf != null) ? rf.getType() : null); |
| } |
| } |
| |
| types = typeList.toArray(new Class<?>[typeList.size()]); |
| numPrimFields = nfields - types.length; |
| } |
| |
| /** |
| * Returns list of ObjectStreamFields representing fields operated on |
| * by this reflector. The shared/unshared values and Field objects |
| * contained by ObjectStreamFields in the list reflect their bindings |
| * to locally defined serializable fields. |
| */ |
| ObjectStreamField[] getFields() { |
| return fields; |
| } |
| |
| /** |
| * Fetches the serializable primitive field values of object obj and |
| * marshals them into byte array buf starting at offset 0. The caller |
| * is responsible for ensuring that obj is of the proper type. |
| */ |
| void getPrimFieldValues(Object obj, byte[] buf) { |
| if (obj == null) { |
| throw new NullPointerException(); |
| } |
| /* assuming checkDefaultSerialize() has been called on the class |
| * descriptor this FieldReflector was obtained from, no field keys |
| * in array should be equal to Unsafe.INVALID_FIELD_OFFSET. |
| */ |
| for (int i = 0; i < numPrimFields; i++) { |
| long key = readKeys[i]; |
| int off = offsets[i]; |
| switch (typeCodes[i]) { |
| case 'Z': |
| Bits.putBoolean(buf, off, unsafe.getBoolean(obj, key)); |
| break; |
| |
| case 'B': |
| buf[off] = unsafe.getByte(obj, key); |
| break; |
| |
| case 'C': |
| Bits.putChar(buf, off, unsafe.getChar(obj, key)); |
| break; |
| |
| case 'S': |
| Bits.putShort(buf, off, unsafe.getShort(obj, key)); |
| break; |
| |
| case 'I': |
| Bits.putInt(buf, off, unsafe.getInt(obj, key)); |
| break; |
| |
| case 'F': |
| Bits.putFloat(buf, off, unsafe.getFloat(obj, key)); |
| break; |
| |
| case 'J': |
| Bits.putLong(buf, off, unsafe.getLong(obj, key)); |
| break; |
| |
| case 'D': |
| Bits.putDouble(buf, off, unsafe.getDouble(obj, key)); |
| break; |
| |
| default: |
| throw new InternalError(); |
| } |
| } |
| } |
| |
| /** |
| * Sets the serializable primitive fields of object obj using values |
| * unmarshalled from byte array buf starting at offset 0. The caller |
| * is responsible for ensuring that obj is of the proper type. |
| */ |
| void setPrimFieldValues(Object obj, byte[] buf) { |
| if (obj == null) { |
| throw new NullPointerException(); |
| } |
| for (int i = 0; i < numPrimFields; i++) { |
| long key = writeKeys[i]; |
| if (key == Unsafe.INVALID_FIELD_OFFSET) { |
| continue; // discard value |
| } |
| int off = offsets[i]; |
| switch (typeCodes[i]) { |
| case 'Z': |
| unsafe.putBoolean(obj, key, Bits.getBoolean(buf, off)); |
| break; |
| |
| case 'B': |
| unsafe.putByte(obj, key, buf[off]); |
| break; |
| |
| case 'C': |
| unsafe.putChar(obj, key, Bits.getChar(buf, off)); |
| break; |
| |
| case 'S': |
| unsafe.putShort(obj, key, Bits.getShort(buf, off)); |
| break; |
| |
| case 'I': |
| unsafe.putInt(obj, key, Bits.getInt(buf, off)); |
| break; |
| |
| case 'F': |
| unsafe.putFloat(obj, key, Bits.getFloat(buf, off)); |
| break; |
| |
| case 'J': |
| unsafe.putLong(obj, key, Bits.getLong(buf, off)); |
| break; |
| |
| case 'D': |
| unsafe.putDouble(obj, key, Bits.getDouble(buf, off)); |
| break; |
| |
| default: |
| throw new InternalError(); |
| } |
| } |
| } |
| |
| /** |
| * Fetches the serializable object field values of object obj and |
| * stores them in array vals starting at offset 0. The caller is |
| * responsible for ensuring that obj is of the proper type. |
| */ |
| void getObjFieldValues(Object obj, Object[] vals) { |
| if (obj == null) { |
| throw new NullPointerException(); |
| } |
| /* assuming checkDefaultSerialize() has been called on the class |
| * descriptor this FieldReflector was obtained from, no field keys |
| * in array should be equal to Unsafe.INVALID_FIELD_OFFSET. |
| */ |
| for (int i = numPrimFields; i < fields.length; i++) { |
| switch (typeCodes[i]) { |
| case 'L': |
| case '[': |
| vals[offsets[i]] = unsafe.getObject(obj, readKeys[i]); |
| break; |
| |
| default: |
| throw new InternalError(); |
| } |
| } |
| } |
| |
| /** |
| * Checks that the given values, from array vals starting at offset 0, |
| * are assignable to the given serializable object fields. |
| * @throws ClassCastException if any value is not assignable |
| */ |
| void checkObjectFieldValueTypes(Object obj, Object[] vals) { |
| setObjFieldValues(obj, vals, true); |
| } |
| |
| /** |
| * Sets the serializable object fields of object obj using values from |
| * array vals starting at offset 0. The caller is responsible for |
| * ensuring that obj is of the proper type; however, attempts to set a |
| * field with a value of the wrong type will trigger an appropriate |
| * ClassCastException. |
| */ |
| void setObjFieldValues(Object obj, Object[] vals) { |
| setObjFieldValues(obj, vals, false); |
| } |
| |
| private void setObjFieldValues(Object obj, Object[] vals, boolean dryRun) { |
| if (obj == null) { |
| throw new NullPointerException(); |
| } |
| for (int i = numPrimFields; i < fields.length; i++) { |
| long key = writeKeys[i]; |
| if (key == Unsafe.INVALID_FIELD_OFFSET) { |
| continue; // discard value |
| } |
| switch (typeCodes[i]) { |
| case 'L': |
| case '[': |
| Object val = vals[offsets[i]]; |
| if (val != null && |
| !types[i - numPrimFields].isInstance(val)) |
| { |
| Field f = fields[i].getField(); |
| throw new ClassCastException( |
| "cannot assign instance of " + |
| val.getClass().getName() + " to field " + |
| f.getDeclaringClass().getName() + "." + |
| f.getName() + " of type " + |
| f.getType().getName() + " in instance of " + |
| obj.getClass().getName()); |
| } |
| if (!dryRun) |
| unsafe.putObject(obj, key, val); |
| break; |
| |
| default: |
| throw new InternalError(); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Matches given set of serializable fields with serializable fields |
| * described by the given local class descriptor, and returns a |
| * FieldReflector instance capable of setting/getting values from the |
| * subset of fields that match (non-matching fields are treated as filler, |
| * for which get operations return default values and set operations |
| * discard given values). Throws InvalidClassException if unresolvable |
| * type conflicts exist between the two sets of fields. |
| */ |
| private static FieldReflector getReflector(ObjectStreamField[] fields, |
| ObjectStreamClass localDesc) |
| throws InvalidClassException |
| { |
| // class irrelevant if no fields |
| Class<?> cl = (localDesc != null && fields.length > 0) ? |
| localDesc.cl : null; |
| processQueue(Caches.reflectorsQueue, Caches.reflectors); |
| FieldReflectorKey key = new FieldReflectorKey(cl, fields, |
| Caches.reflectorsQueue); |
| Reference<?> ref = Caches.reflectors.get(key); |
| Object entry = null; |
| if (ref != null) { |
| entry = ref.get(); |
| } |
| EntryFuture future = null; |
| if (entry == null) { |
| EntryFuture newEntry = new EntryFuture(); |
| Reference<?> newRef = new SoftReference<>(newEntry); |
| do { |
| if (ref != null) { |
| Caches.reflectors.remove(key, ref); |
| } |
| ref = Caches.reflectors.putIfAbsent(key, newRef); |
| if (ref != null) { |
| entry = ref.get(); |
| } |
| } while (ref != null && entry == null); |
| if (entry == null) { |
| future = newEntry; |
| } |
| } |
| |
| if (entry instanceof FieldReflector) { // check common case first |
| return (FieldReflector) entry; |
| } else if (entry instanceof EntryFuture) { |
| entry = ((EntryFuture) entry).get(); |
| } else if (entry == null) { |
| try { |
| entry = new FieldReflector(matchFields(fields, localDesc)); |
| } catch (Throwable th) { |
| entry = th; |
| } |
| future.set(entry); |
| Caches.reflectors.put(key, new SoftReference<>(entry)); |
| } |
| |
| if (entry instanceof FieldReflector) { |
| return (FieldReflector) entry; |
| } else if (entry instanceof InvalidClassException) { |
| throw (InvalidClassException) entry; |
| } else if (entry instanceof RuntimeException) { |
| throw (RuntimeException) entry; |
| } else if (entry instanceof Error) { |
| throw (Error) entry; |
| } else { |
| throw new InternalError("unexpected entry: " + entry); |
| } |
| } |
| |
| /** |
| * FieldReflector cache lookup key. Keys are considered equal if they |
| * refer to the same class and equivalent field formats. |
| */ |
| private static class FieldReflectorKey extends WeakReference<Class<?>> { |
| |
| private final String sigs; |
| private final int hash; |
| private final boolean nullClass; |
| |
| FieldReflectorKey(Class<?> cl, ObjectStreamField[] fields, |
| ReferenceQueue<Class<?>> queue) |
| { |
| super(cl, queue); |
| nullClass = (cl == null); |
| StringBuilder sbuf = new StringBuilder(); |
| for (int i = 0; i < fields.length; i++) { |
| ObjectStreamField f = fields[i]; |
| sbuf.append(f.getName()).append(f.getSignature()); |
| } |
| sigs = sbuf.toString(); |
| hash = System.identityHashCode(cl) + sigs.hashCode(); |
| } |
| |
| public int hashCode() { |
| return hash; |
| } |
| |
| public boolean equals(Object obj) { |
| if (obj == this) { |
| return true; |
| } |
| |
| if (obj instanceof FieldReflectorKey) { |
| FieldReflectorKey other = (FieldReflectorKey) obj; |
| Class<?> referent; |
| return (nullClass ? other.nullClass |
| : ((referent = get()) != null) && |
| (referent == other.get())) && |
| sigs.equals(other.sigs); |
| } else { |
| return false; |
| } |
| } |
| } |
| |
| /** |
| * Matches given set of serializable fields with serializable fields |
| * obtained from the given local class descriptor (which contain bindings |
| * to reflective Field objects). Returns list of ObjectStreamFields in |
| * which each ObjectStreamField whose signature matches that of a local |
| * field contains a Field object for that field; unmatched |
| * ObjectStreamFields contain null Field objects. Shared/unshared settings |
| * of the returned ObjectStreamFields also reflect those of matched local |
| * ObjectStreamFields. Throws InvalidClassException if unresolvable type |
| * conflicts exist between the two sets of fields. |
| */ |
| private static ObjectStreamField[] matchFields(ObjectStreamField[] fields, |
| ObjectStreamClass localDesc) |
| throws InvalidClassException |
| { |
| ObjectStreamField[] localFields = (localDesc != null) ? |
| localDesc.fields : NO_FIELDS; |
| |
| /* |
| * Even if fields == localFields, we cannot simply return localFields |
| * here. In previous implementations of serialization, |
| * ObjectStreamField.getType() returned Object.class if the |
| * ObjectStreamField represented a non-primitive field and belonged to |
| * a non-local class descriptor. To preserve this (questionable) |
| * behavior, the ObjectStreamField instances returned by matchFields |
| * cannot report non-primitive types other than Object.class; hence |
| * localFields cannot be returned directly. |
| */ |
| |
| ObjectStreamField[] matches = new ObjectStreamField[fields.length]; |
| for (int i = 0; i < fields.length; i++) { |
| ObjectStreamField f = fields[i], m = null; |
| for (int j = 0; j < localFields.length; j++) { |
| ObjectStreamField lf = localFields[j]; |
| if (f.getName().equals(lf.getName())) { |
| if ((f.isPrimitive() || lf.isPrimitive()) && |
| f.getTypeCode() != lf.getTypeCode()) |
| { |
| throw new InvalidClassException(localDesc.name, |
| "incompatible types for field " + f.getName()); |
| } |
| if (lf.getField() != null) { |
| m = new ObjectStreamField( |
| lf.getField(), lf.isUnshared(), false); |
| } else { |
| m = new ObjectStreamField( |
| lf.getName(), lf.getSignature(), lf.isUnshared()); |
| } |
| } |
| } |
| if (m == null) { |
| m = new ObjectStreamField( |
| f.getName(), f.getSignature(), false); |
| } |
| m.setOffset(f.getOffset()); |
| matches[i] = m; |
| } |
| return matches; |
| } |
| |
| /** |
| * Removes from the specified map any keys that have been enqueued |
| * on the specified reference queue. |
| */ |
| static void processQueue(ReferenceQueue<Class<?>> queue, |
| ConcurrentMap<? extends |
| WeakReference<Class<?>>, ?> map) |
| { |
| Reference<? extends Class<?>> ref; |
| while((ref = queue.poll()) != null) { |
| map.remove(ref); |
| } |
| } |
| |
| /** |
| * Weak key for Class objects. |
| * |
| **/ |
| static class WeakClassKey extends WeakReference<Class<?>> { |
| /** |
| * saved value of the referent's identity hash code, to maintain |
| * a consistent hash code after the referent has been cleared |
| */ |
| private final int hash; |
| |
| /** |
| * Create a new WeakClassKey to the given object, registered |
| * with a queue. |
| */ |
| WeakClassKey(Class<?> cl, ReferenceQueue<Class<?>> refQueue) { |
| super(cl, refQueue); |
| hash = System.identityHashCode(cl); |
| } |
| |
| /** |
| * Returns the identity hash code of the original referent. |
| */ |
| public int hashCode() { |
| return hash; |
| } |
| |
| /** |
| * Returns true if the given object is this identical |
| * WeakClassKey instance, or, if this object's referent has not |
| * been cleared, if the given object is another WeakClassKey |
| * instance with the identical non-null referent as this one. |
| */ |
| public boolean equals(Object obj) { |
| if (obj == this) { |
| return true; |
| } |
| |
| if (obj instanceof WeakClassKey) { |
| Object referent = get(); |
| return (referent != null) && |
| (referent == ((WeakClassKey) obj).get()); |
| } else { |
| return false; |
| } |
| } |
| } |
| } |