| /* |
| * Copyright (c) 2010, 2013, 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 jdk.nashorn.api.scripting; |
| |
| import java.nio.ByteBuffer; |
| import java.security.AccessControlContext; |
| import java.security.AccessController; |
| import java.security.Permissions; |
| import java.security.PrivilegedAction; |
| import java.security.ProtectionDomain; |
| import java.util.AbstractMap; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.LinkedHashSet; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.Set; |
| import java.util.concurrent.Callable; |
| import javax.script.Bindings; |
| import jdk.nashorn.internal.objects.Global; |
| import jdk.nashorn.internal.runtime.ConsString; |
| import jdk.nashorn.internal.runtime.Context; |
| import jdk.nashorn.internal.runtime.ECMAException; |
| import jdk.nashorn.internal.runtime.JSONListAdapter; |
| import jdk.nashorn.internal.runtime.JSType; |
| import jdk.nashorn.internal.runtime.ScriptFunction; |
| import jdk.nashorn.internal.runtime.ScriptObject; |
| import jdk.nashorn.internal.runtime.ScriptRuntime; |
| import jdk.nashorn.internal.runtime.arrays.ArrayData; |
| import jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor; |
| |
| /** |
| * Mirror object that wraps a given Nashorn Script object. |
| * |
| * @since 1.8u40 |
| */ |
| public final class ScriptObjectMirror extends AbstractJSObject implements Bindings { |
| private static AccessControlContext getContextAccCtxt() { |
| final Permissions perms = new Permissions(); |
| perms.add(new RuntimePermission(Context.NASHORN_GET_CONTEXT)); |
| return new AccessControlContext(new ProtectionDomain[] { new ProtectionDomain(null, perms) }); |
| } |
| |
| private static final AccessControlContext GET_CONTEXT_ACC_CTXT = getContextAccCtxt(); |
| |
| private final ScriptObject sobj; |
| private final Global global; |
| private final boolean strict; |
| private final boolean jsonCompatible; |
| |
| @Override |
| public boolean equals(final Object other) { |
| if (other instanceof ScriptObjectMirror) { |
| return sobj.equals(((ScriptObjectMirror)other).sobj); |
| } |
| |
| return false; |
| } |
| |
| @Override |
| public int hashCode() { |
| return sobj.hashCode(); |
| } |
| |
| @Override |
| public String toString() { |
| return inGlobal(new Callable<String>() { |
| @Override |
| public String call() { |
| return ScriptRuntime.safeToString(sobj); |
| } |
| }); |
| } |
| |
| // JSObject methods |
| |
| @Override |
| public Object call(final Object thiz, final Object... args) { |
| final Global oldGlobal = Context.getGlobal(); |
| final boolean globalChanged = (oldGlobal != global); |
| |
| try { |
| if (globalChanged) { |
| Context.setGlobal(global); |
| } |
| |
| if (sobj instanceof ScriptFunction) { |
| final Object[] modArgs = globalChanged? wrapArrayLikeMe(args, oldGlobal) : args; |
| final Object self = globalChanged? wrapLikeMe(thiz, oldGlobal) : thiz; |
| return wrapLikeMe(ScriptRuntime.apply((ScriptFunction)sobj, unwrap(self, global), unwrapArray(modArgs, global))); |
| } |
| |
| throw new RuntimeException("not a function: " + toString()); |
| } catch (final NashornException ne) { |
| throw ne.initEcmaError(global); |
| } catch (final RuntimeException | Error e) { |
| throw e; |
| } catch (final Throwable t) { |
| throw new RuntimeException(t); |
| } finally { |
| if (globalChanged) { |
| Context.setGlobal(oldGlobal); |
| } |
| } |
| } |
| |
| @Override |
| public Object newObject(final Object... args) { |
| final Global oldGlobal = Context.getGlobal(); |
| final boolean globalChanged = (oldGlobal != global); |
| |
| try { |
| if (globalChanged) { |
| Context.setGlobal(global); |
| } |
| |
| if (sobj instanceof ScriptFunction) { |
| final Object[] modArgs = globalChanged? wrapArrayLikeMe(args, oldGlobal) : args; |
| return wrapLikeMe(ScriptRuntime.construct((ScriptFunction)sobj, unwrapArray(modArgs, global))); |
| } |
| |
| throw new RuntimeException("not a constructor: " + toString()); |
| } catch (final NashornException ne) { |
| throw ne.initEcmaError(global); |
| } catch (final RuntimeException | Error e) { |
| throw e; |
| } catch (final Throwable t) { |
| throw new RuntimeException(t); |
| } finally { |
| if (globalChanged) { |
| Context.setGlobal(oldGlobal); |
| } |
| } |
| } |
| |
| @Override |
| public Object eval(final String s) { |
| return inGlobal(new Callable<Object>() { |
| @Override |
| public Object call() { |
| final Context context = AccessController.doPrivileged( |
| new PrivilegedAction<Context>() { |
| @Override |
| public Context run() { |
| return Context.getContext(); |
| } |
| }, GET_CONTEXT_ACC_CTXT); |
| return wrapLikeMe(context.eval(global, s, sobj, null)); |
| } |
| }); |
| } |
| |
| /** |
| * Call member function |
| * @param functionName function name |
| * @param args arguments |
| * @return return value of function |
| */ |
| public Object callMember(final String functionName, final Object... args) { |
| Objects.requireNonNull(functionName); |
| final Global oldGlobal = Context.getGlobal(); |
| final boolean globalChanged = (oldGlobal != global); |
| |
| try { |
| if (globalChanged) { |
| Context.setGlobal(global); |
| } |
| |
| final Object val = sobj.get(functionName); |
| if (val instanceof ScriptFunction) { |
| final Object[] modArgs = globalChanged? wrapArrayLikeMe(args, oldGlobal) : args; |
| return wrapLikeMe(ScriptRuntime.apply((ScriptFunction)val, sobj, unwrapArray(modArgs, global))); |
| } else if (val instanceof JSObject && ((JSObject)val).isFunction()) { |
| return ((JSObject)val).call(sobj, args); |
| } |
| |
| throw new NoSuchMethodException("No such function " + functionName); |
| } catch (final NashornException ne) { |
| throw ne.initEcmaError(global); |
| } catch (final RuntimeException | Error e) { |
| throw e; |
| } catch (final Throwable t) { |
| throw new RuntimeException(t); |
| } finally { |
| if (globalChanged) { |
| Context.setGlobal(oldGlobal); |
| } |
| } |
| } |
| |
| @Override |
| public Object getMember(final String name) { |
| Objects.requireNonNull(name); |
| return inGlobal(new Callable<Object>() { |
| @Override public Object call() { |
| return wrapLikeMe(sobj.get(name)); |
| } |
| }); |
| } |
| |
| @Override |
| public Object getSlot(final int index) { |
| return inGlobal(new Callable<Object>() { |
| @Override public Object call() { |
| return wrapLikeMe(sobj.get(index)); |
| } |
| }); |
| } |
| |
| @Override |
| public boolean hasMember(final String name) { |
| Objects.requireNonNull(name); |
| return inGlobal(new Callable<Boolean>() { |
| @Override public Boolean call() { |
| return sobj.has(name); |
| } |
| }); |
| } |
| |
| @Override |
| public boolean hasSlot(final int slot) { |
| return inGlobal(new Callable<Boolean>() { |
| @Override public Boolean call() { |
| return sobj.has(slot); |
| } |
| }); |
| } |
| |
| @Override |
| public void removeMember(final String name) { |
| remove(Objects.requireNonNull(name)); |
| } |
| |
| @Override |
| public void setMember(final String name, final Object value) { |
| put(Objects.requireNonNull(name), value); |
| } |
| |
| @Override |
| public void setSlot(final int index, final Object value) { |
| inGlobal(new Callable<Void>() { |
| @Override public Void call() { |
| sobj.set(index, unwrap(value, global), getCallSiteFlags()); |
| return null; |
| } |
| }); |
| } |
| |
| /** |
| * Nashorn extension: setIndexedPropertiesToExternalArrayData. |
| * set indexed properties be exposed from a given nio ByteBuffer. |
| * |
| * @param buf external buffer - should be a nio ByteBuffer |
| */ |
| public void setIndexedPropertiesToExternalArrayData(final ByteBuffer buf) { |
| inGlobal(new Callable<Void>() { |
| @Override public Void call() { |
| sobj.setArray(ArrayData.allocate(buf)); |
| return null; |
| } |
| }); |
| } |
| |
| @Override |
| public boolean isInstance(final Object instance) { |
| if (! (instance instanceof ScriptObjectMirror)) { |
| return false; |
| } |
| |
| final ScriptObjectMirror mirror = (ScriptObjectMirror)instance; |
| // if not belongs to my global scope, return false |
| if (global != mirror.global) { |
| return false; |
| } |
| |
| return inGlobal(new Callable<Boolean>() { |
| @Override public Boolean call() { |
| return sobj.isInstance(mirror.sobj); |
| } |
| }); |
| } |
| |
| @Override |
| public String getClassName() { |
| return sobj.getClassName(); |
| } |
| |
| @Override |
| public boolean isFunction() { |
| return sobj instanceof ScriptFunction; |
| } |
| |
| @Override |
| public boolean isStrictFunction() { |
| return isFunction() && ((ScriptFunction)sobj).isStrict(); |
| } |
| |
| @Override |
| public boolean isArray() { |
| return sobj.isArray(); |
| } |
| |
| // javax.script.Bindings methods |
| |
| @Override |
| public void clear() { |
| inGlobal(new Callable<Object>() { |
| @Override public Object call() { |
| sobj.clear(strict); |
| return null; |
| } |
| }); |
| } |
| |
| @Override |
| public boolean containsKey(final Object key) { |
| checkKey(key); |
| return inGlobal(new Callable<Boolean>() { |
| @Override public Boolean call() { |
| return sobj.containsKey(key); |
| } |
| }); |
| } |
| |
| @Override |
| public boolean containsValue(final Object value) { |
| return inGlobal(new Callable<Boolean>() { |
| @Override public Boolean call() { |
| return sobj.containsValue(unwrap(value, global)); |
| } |
| }); |
| } |
| |
| @Override |
| public Set<Map.Entry<String, Object>> entrySet() { |
| return inGlobal(new Callable<Set<Map.Entry<String, Object>>>() { |
| @Override public Set<Map.Entry<String, Object>> call() { |
| final Iterator<String> iter = sobj.propertyIterator(); |
| final Set<Map.Entry<String, Object>> entries = new LinkedHashSet<>(); |
| |
| while (iter.hasNext()) { |
| final String key = iter.next(); |
| final Object value = translateUndefined(wrapLikeMe(sobj.get(key))); |
| entries.add(new AbstractMap.SimpleImmutableEntry<>(key, value)); |
| } |
| |
| return Collections.unmodifiableSet(entries); |
| } |
| }); |
| } |
| |
| @Override |
| public Object get(final Object key) { |
| checkKey(key); |
| return inGlobal(new Callable<Object>() { |
| @Override public Object call() { |
| return translateUndefined(wrapLikeMe(sobj.get(key))); |
| } |
| }); |
| } |
| |
| @Override |
| public boolean isEmpty() { |
| return inGlobal(new Callable<Boolean>() { |
| @Override public Boolean call() { |
| return sobj.isEmpty(); |
| } |
| }); |
| } |
| |
| @Override |
| public Set<String> keySet() { |
| return inGlobal(new Callable<Set<String>>() { |
| @Override public Set<String> call() { |
| final Iterator<String> iter = sobj.propertyIterator(); |
| final Set<String> keySet = new LinkedHashSet<>(); |
| |
| while (iter.hasNext()) { |
| keySet.add(iter.next()); |
| } |
| |
| return Collections.unmodifiableSet(keySet); |
| } |
| }); |
| } |
| |
| @Override |
| public Object put(final String key, final Object value) { |
| checkKey(key); |
| final ScriptObject oldGlobal = Context.getGlobal(); |
| final boolean globalChanged = (oldGlobal != global); |
| return inGlobal(new Callable<Object>() { |
| @Override public Object call() { |
| final Object modValue = globalChanged? wrapLikeMe(value, oldGlobal) : value; |
| return translateUndefined(wrapLikeMe(sobj.put(key, unwrap(modValue, global), strict))); |
| } |
| }); |
| } |
| |
| @Override |
| public void putAll(final Map<? extends String, ? extends Object> map) { |
| Objects.requireNonNull(map); |
| final ScriptObject oldGlobal = Context.getGlobal(); |
| final boolean globalChanged = (oldGlobal != global); |
| inGlobal(new Callable<Object>() { |
| @Override public Object call() { |
| for (final Map.Entry<? extends String, ? extends Object> entry : map.entrySet()) { |
| final Object value = entry.getValue(); |
| final Object modValue = globalChanged? wrapLikeMe(value, oldGlobal) : value; |
| final String key = entry.getKey(); |
| checkKey(key); |
| sobj.set(key, unwrap(modValue, global), getCallSiteFlags()); |
| } |
| return null; |
| } |
| }); |
| } |
| |
| @Override |
| public Object remove(final Object key) { |
| checkKey(key); |
| return inGlobal(new Callable<Object>() { |
| @Override public Object call() { |
| return translateUndefined(wrapLikeMe(sobj.remove(key, strict))); |
| } |
| }); |
| } |
| |
| /** |
| * Delete a property from this object. |
| * |
| * @param key the property to be deleted |
| * |
| * @return if the delete was successful or not |
| */ |
| public boolean delete(final Object key) { |
| return inGlobal(new Callable<Boolean>() { |
| @Override public Boolean call() { |
| return sobj.delete(unwrap(key, global), strict); |
| } |
| }); |
| } |
| |
| @Override |
| public int size() { |
| return inGlobal(new Callable<Integer>() { |
| @Override public Integer call() { |
| return sobj.size(); |
| } |
| }); |
| } |
| |
| @Override |
| public Collection<Object> values() { |
| return inGlobal(new Callable<Collection<Object>>() { |
| @Override public Collection<Object> call() { |
| final List<Object> values = new ArrayList<>(size()); |
| final Iterator<Object> iter = sobj.valueIterator(); |
| |
| while (iter.hasNext()) { |
| values.add(translateUndefined(wrapLikeMe(iter.next()))); |
| } |
| |
| return Collections.unmodifiableList(values); |
| } |
| }); |
| } |
| |
| // Support for ECMAScript Object API on mirrors |
| |
| /** |
| * Return the __proto__ of this object. |
| * @return __proto__ object. |
| */ |
| public Object getProto() { |
| return inGlobal(new Callable<Object>() { |
| @Override public Object call() { |
| return wrapLikeMe(sobj.getProto()); |
| } |
| }); |
| } |
| |
| /** |
| * Set the __proto__ of this object. |
| * @param proto new proto for this object |
| */ |
| public void setProto(final Object proto) { |
| inGlobal(new Callable<Void>() { |
| @Override public Void call() { |
| sobj.setPrototypeOf(unwrap(proto, global)); |
| return null; |
| } |
| }); |
| } |
| |
| /** |
| * ECMA 8.12.1 [[GetOwnProperty]] (P) |
| * |
| * @param key property key |
| * |
| * @return Returns the Property Descriptor of the named own property of this |
| * object, or undefined if absent. |
| */ |
| public Object getOwnPropertyDescriptor(final String key) { |
| return inGlobal(new Callable<Object>() { |
| @Override public Object call() { |
| return wrapLikeMe(sobj.getOwnPropertyDescriptor(key)); |
| } |
| }); |
| } |
| |
| /** |
| * return an array of own property keys associated with the object. |
| * |
| * @param all True if to include non-enumerable keys. |
| * @return Array of keys. |
| */ |
| public String[] getOwnKeys(final boolean all) { |
| return inGlobal(new Callable<String[]>() { |
| @Override public String[] call() { |
| return sobj.getOwnKeys(all); |
| } |
| }); |
| } |
| |
| /** |
| * Flag this script object as non extensible |
| * |
| * @return the object after being made non extensible |
| */ |
| public ScriptObjectMirror preventExtensions() { |
| return inGlobal(new Callable<ScriptObjectMirror>() { |
| @Override public ScriptObjectMirror call() { |
| sobj.preventExtensions(); |
| return ScriptObjectMirror.this; |
| } |
| }); |
| } |
| |
| /** |
| * Check if this script object is extensible |
| * @return true if extensible |
| */ |
| public boolean isExtensible() { |
| return inGlobal(new Callable<Boolean>() { |
| @Override public Boolean call() { |
| return sobj.isExtensible(); |
| } |
| }); |
| } |
| |
| /** |
| * ECMAScript 15.2.3.8 - seal implementation |
| * @return the sealed script object |
| */ |
| public ScriptObjectMirror seal() { |
| return inGlobal(new Callable<ScriptObjectMirror>() { |
| @Override public ScriptObjectMirror call() { |
| sobj.seal(); |
| return ScriptObjectMirror.this; |
| } |
| }); |
| } |
| |
| /** |
| * Check whether this script object is sealed |
| * @return true if sealed |
| */ |
| public boolean isSealed() { |
| return inGlobal(new Callable<Boolean>() { |
| @Override public Boolean call() { |
| return sobj.isSealed(); |
| } |
| }); |
| } |
| |
| /** |
| * ECMA 15.2.39 - freeze implementation. Freeze this script object |
| * @return the frozen script object |
| */ |
| public ScriptObjectMirror freeze() { |
| return inGlobal(new Callable<ScriptObjectMirror>() { |
| @Override public ScriptObjectMirror call() { |
| sobj.freeze(); |
| return ScriptObjectMirror.this; |
| } |
| }); |
| } |
| |
| /** |
| * Check whether this script object is frozen |
| * @return true if frozen |
| */ |
| public boolean isFrozen() { |
| return inGlobal(new Callable<Boolean>() { |
| @Override public Boolean call() { |
| return sobj.isFrozen(); |
| } |
| }); |
| } |
| |
| /** |
| * Utility to check if given object is ECMAScript undefined value |
| * |
| * @param obj object to check |
| * @return true if 'obj' is ECMAScript undefined value |
| */ |
| public static boolean isUndefined(final Object obj) { |
| return obj == ScriptRuntime.UNDEFINED; |
| } |
| |
| /** |
| * Utility to convert this script object to the given type. |
| * |
| * @param <T> destination type to convert to |
| * @param type destination type to convert to |
| * @return converted object |
| */ |
| public <T> T to(final Class<T> type) { |
| return inGlobal(new Callable<T>() { |
| @Override |
| public T call() { |
| return type.cast(ScriptUtils.convert(sobj, type)); |
| } |
| }); |
| } |
| |
| /** |
| * Make a script object mirror on given object if needed. |
| * |
| * @param obj object to be wrapped/converted |
| * @param homeGlobal global to which this object belongs. |
| * @return wrapped/converted object |
| */ |
| public static Object wrap(final Object obj, final Object homeGlobal) { |
| return wrap(obj, homeGlobal, false); |
| } |
| |
| /** |
| * Make a script object mirror on given object if needed. The created wrapper will implement |
| * the Java {@code List} interface if {@code obj} is a JavaScript {@code Array} object; |
| * this is compatible with Java JSON libraries expectations. Arrays retrieved through its |
| * properties (transitively) will also implement the list interface. |
| * |
| * @param obj object to be wrapped/converted |
| * @param homeGlobal global to which this object belongs. |
| * @return wrapped/converted object |
| */ |
| public static Object wrapAsJSONCompatible(final Object obj, final Object homeGlobal) { |
| return wrap(obj, homeGlobal, true); |
| } |
| |
| /** |
| * Make a script object mirror on given object if needed. |
| * |
| * @param obj object to be wrapped/converted |
| * @param homeGlobal global to which this object belongs. |
| * @param jsonCompatible if true, the created wrapper will implement the Java {@code List} interface if |
| * {@code obj} is a JavaScript {@code Array} object. Arrays retrieved through its properties (transitively) |
| * will also implement the list interface. |
| * @return wrapped/converted object |
| */ |
| private static Object wrap(final Object obj, final Object homeGlobal, final boolean jsonCompatible) { |
| if(obj instanceof ScriptObject) { |
| if (!(homeGlobal instanceof Global)) { |
| return obj; |
| } |
| final ScriptObject sobj = (ScriptObject)obj; |
| final Global global = (Global)homeGlobal; |
| final ScriptObjectMirror mirror = new ScriptObjectMirror(sobj, global, jsonCompatible); |
| if (jsonCompatible && sobj.isArray()) { |
| return new JSONListAdapter(mirror, global); |
| } |
| return mirror; |
| } else if(obj instanceof ConsString) { |
| return obj.toString(); |
| } else if (jsonCompatible && obj instanceof ScriptObjectMirror) { |
| // Since choosing JSON compatible representation is an explicit decision on user's part, if we're asked to |
| // wrap a mirror that was not JSON compatible, explicitly create its compatible counterpart following the |
| // principle of least surprise. |
| return ((ScriptObjectMirror)obj).asJSONCompatible(); |
| } |
| return obj; |
| } |
| |
| /** |
| * Wraps the passed object with the same jsonCompatible flag as this mirror. |
| * @param obj the object |
| * @param homeGlobal the object's home global. |
| * @return a wrapper for the object. |
| */ |
| private Object wrapLikeMe(final Object obj, final Object homeGlobal) { |
| return wrap(obj, homeGlobal, jsonCompatible); |
| } |
| |
| /** |
| * Wraps the passed object with the same home global and jsonCompatible flag as this mirror. |
| * @param obj the object |
| * @return a wrapper for the object. |
| */ |
| private Object wrapLikeMe(final Object obj) { |
| return wrapLikeMe(obj, global); |
| } |
| |
| /** |
| * Unwrap a script object mirror if needed. |
| * |
| * @param obj object to be unwrapped |
| * @param homeGlobal global to which this object belongs |
| * @return unwrapped object |
| */ |
| public static Object unwrap(final Object obj, final Object homeGlobal) { |
| if (obj instanceof ScriptObjectMirror) { |
| final ScriptObjectMirror mirror = (ScriptObjectMirror)obj; |
| return (mirror.global == homeGlobal)? mirror.sobj : obj; |
| } else if (obj instanceof JSONListAdapter) { |
| return ((JSONListAdapter)obj).unwrap(homeGlobal); |
| } |
| |
| return obj; |
| } |
| |
| /** |
| * Wrap an array of object to script object mirrors if needed. |
| * |
| * @param args array to be unwrapped |
| * @param homeGlobal global to which this object belongs |
| * @return wrapped array |
| */ |
| public static Object[] wrapArray(final Object[] args, final Object homeGlobal) { |
| return wrapArray(args, homeGlobal, false); |
| } |
| |
| private static Object[] wrapArray(final Object[] args, final Object homeGlobal, final boolean jsonCompatible) { |
| if (args == null || args.length == 0) { |
| return args; |
| } |
| |
| final Object[] newArgs = new Object[args.length]; |
| int index = 0; |
| for (final Object obj : args) { |
| newArgs[index] = wrap(obj, homeGlobal, jsonCompatible); |
| index++; |
| } |
| return newArgs; |
| } |
| |
| private Object[] wrapArrayLikeMe(final Object[] args, final Object homeGlobal) { |
| return wrapArray(args, homeGlobal, jsonCompatible); |
| } |
| |
| /** |
| * Unwrap an array of script object mirrors if needed. |
| * |
| * @param args array to be unwrapped |
| * @param homeGlobal global to which this object belongs |
| * @return unwrapped array |
| */ |
| public static Object[] unwrapArray(final Object[] args, final Object homeGlobal) { |
| if (args == null || args.length == 0) { |
| return args; |
| } |
| |
| final Object[] newArgs = new Object[args.length]; |
| int index = 0; |
| for (final Object obj : args) { |
| newArgs[index] = unwrap(obj, homeGlobal); |
| index++; |
| } |
| return newArgs; |
| } |
| |
| /** |
| * Are the given objects mirrors to same underlying object? |
| * |
| * @param obj1 first object |
| * @param obj2 second object |
| * @return true if obj1 and obj2 are identical script objects or mirrors of it. |
| */ |
| public static boolean identical(final Object obj1, final Object obj2) { |
| final Object o1 = (obj1 instanceof ScriptObjectMirror)? |
| ((ScriptObjectMirror)obj1).sobj : obj1; |
| |
| final Object o2 = (obj2 instanceof ScriptObjectMirror)? |
| ((ScriptObjectMirror)obj2).sobj : obj2; |
| |
| return o1 == o2; |
| } |
| |
| // package-privates below this. |
| |
| ScriptObjectMirror(final ScriptObject sobj, final Global global) { |
| this(sobj, global, false); |
| } |
| |
| private ScriptObjectMirror(final ScriptObject sobj, final Global global, final boolean jsonCompatible) { |
| assert sobj != null : "ScriptObjectMirror on null!"; |
| assert global != null : "home Global is null"; |
| |
| this.sobj = sobj; |
| this.global = global; |
| this.strict = global.isStrictContext(); |
| this.jsonCompatible = jsonCompatible; |
| } |
| |
| // accessors for script engine |
| ScriptObject getScriptObject() { |
| return sobj; |
| } |
| |
| Global getHomeGlobal() { |
| return global; |
| } |
| |
| static Object translateUndefined(final Object obj) { |
| return (obj == ScriptRuntime.UNDEFINED)? null : obj; |
| } |
| |
| private int getCallSiteFlags() { |
| return strict ? NashornCallSiteDescriptor.CALLSITE_STRICT : 0; |
| } |
| |
| // internals only below this. |
| private <V> V inGlobal(final Callable<V> callable) { |
| final Global oldGlobal = Context.getGlobal(); |
| final boolean globalChanged = (oldGlobal != global); |
| if (globalChanged) { |
| Context.setGlobal(global); |
| } |
| try { |
| return callable.call(); |
| } catch (final NashornException ne) { |
| throw ne.initEcmaError(global); |
| } catch (final RuntimeException e) { |
| throw e; |
| } catch (final Exception e) { |
| throw new AssertionError("Cannot happen", e); |
| } finally { |
| if (globalChanged) { |
| Context.setGlobal(oldGlobal); |
| } |
| } |
| } |
| |
| /** |
| * Ensures the key is not null, empty string, or a non-String object. The contract of the {@link Bindings} |
| * interface requires that these are not accepted as keys. |
| * @param key the key to check |
| * @throws NullPointerException if key is null |
| * @throws ClassCastException if key is not a String |
| * @throws IllegalArgumentException if key is empty string |
| */ |
| private static void checkKey(final Object key) { |
| Objects.requireNonNull(key, "key can not be null"); |
| |
| if (!(key instanceof String)) { |
| throw new ClassCastException("key should be a String. It is " + key.getClass().getName() + " instead."); |
| } else if (((String)key).length() == 0) { |
| throw new IllegalArgumentException("key can not be empty"); |
| } |
| } |
| |
| @Override @Deprecated |
| public double toNumber() { |
| return inGlobal(new Callable<Double>() { |
| @Override public Double call() { |
| return JSType.toNumber(sobj); |
| } |
| }); |
| } |
| |
| @Override |
| public Object getDefaultValue(final Class<?> hint) { |
| return inGlobal(new Callable<Object>() { |
| @Override public Object call() { |
| try { |
| return sobj.getDefaultValue(hint); |
| } catch (final ECMAException e) { |
| // We're catching ECMAException (likely TypeError), and translating it to |
| // UnsupportedOperationException. This in turn will be translated into TypeError of the |
| // caller's Global by JSType#toPrimitive(JSObject,Class) therefore ensuring that it's |
| // recognized as "instanceof TypeError" in the caller. |
| throw new UnsupportedOperationException(e.getMessage(), e); |
| } |
| } |
| }); |
| } |
| |
| private ScriptObjectMirror asJSONCompatible() { |
| if (this.jsonCompatible) { |
| return this; |
| } |
| return new ScriptObjectMirror(sobj, global, true); |
| } |
| } |