| /* |
| * 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.internal.objects; |
| |
| import static jdk.nashorn.internal.runtime.ECMAErrors.typeError; |
| import static jdk.nashorn.internal.runtime.UnwarrantedOptimismException.isValid; |
| |
| import jdk.dynalink.CallSiteDescriptor; |
| import jdk.dynalink.beans.StaticClass; |
| import jdk.dynalink.linker.GuardedInvocation; |
| import jdk.dynalink.linker.LinkRequest; |
| import jdk.nashorn.internal.objects.annotations.Attribute; |
| import jdk.nashorn.internal.objects.annotations.Constructor; |
| import jdk.nashorn.internal.objects.annotations.Function; |
| import jdk.nashorn.internal.objects.annotations.ScriptClass; |
| import jdk.nashorn.internal.runtime.Context; |
| import jdk.nashorn.internal.runtime.JSType; |
| import jdk.nashorn.internal.runtime.NativeJavaPackage; |
| import jdk.nashorn.internal.runtime.PropertyMap; |
| import jdk.nashorn.internal.runtime.ScriptObject; |
| import jdk.nashorn.internal.runtime.ScriptRuntime; |
| import jdk.nashorn.internal.runtime.UnwarrantedOptimismException; |
| import jdk.nashorn.internal.runtime.linker.NashornCallSiteDescriptor; |
| |
| /** |
| * This is "JavaImporter" constructor. This constructor allows you to use Java types omitting explicit package names. |
| * Objects of this constructor are used along with {@code "with"} statements and as such are not usable in ECMAScript |
| * strict mode. Example: |
| * <pre> |
| * var imports = new JavaImporter(java.util, java.io); |
| * with (imports) { |
| * var m = new HashMap(); // java.util.HashMap |
| * var f = new File("."); // java.io.File |
| * ... |
| * } |
| * </pre> |
| * Note however that the preferred way for accessing Java types in Nashorn is through the use of |
| * {@link NativeJava#type(Object, Object) Java.type()} method. |
| */ |
| @ScriptClass("JavaImporter") |
| public final class NativeJavaImporter extends ScriptObject { |
| private final Object[] args; |
| |
| // initialized by nasgen |
| private static PropertyMap $nasgenmap$; |
| |
| private NativeJavaImporter(final Object[] args, final ScriptObject proto, final PropertyMap map) { |
| super(proto, map); |
| this.args = args; |
| } |
| |
| private NativeJavaImporter(final Object[] args, final Global global) { |
| this(args, global.getJavaImporterPrototype(), $nasgenmap$); |
| } |
| |
| private NativeJavaImporter(final Object[] args) { |
| this(args, Global.instance()); |
| } |
| |
| @Override |
| public String getClassName() { |
| return "JavaImporter"; |
| } |
| |
| /** |
| * Constructor |
| * @param isNew is the new operator used for instantiating this NativeJavaImporter |
| * @param self self reference |
| * @param args arguments |
| * @return NativeJavaImporter instance |
| */ |
| @Constructor(arity = 1) |
| public static NativeJavaImporter constructor(final boolean isNew, final Object self, final Object... args) { |
| return new NativeJavaImporter(args); |
| } |
| |
| /** |
| * "No such property" handler. |
| * |
| * @param self self reference |
| * @param name property name |
| * @return value of the missing property |
| */ |
| @Function(attributes = Attribute.NOT_ENUMERABLE) |
| public static Object __noSuchProperty__(final Object self, final Object name) { |
| if (! (self instanceof NativeJavaImporter)) { |
| throw typeError("not.a.java.importer", ScriptRuntime.safeToString(self)); |
| } |
| return ((NativeJavaImporter)self).createProperty(JSType.toString(name)); |
| } |
| |
| /** |
| * "No such method call" handler |
| * |
| * @param self self reference |
| * @param args arguments to method |
| * @return never returns always throw TypeError |
| */ |
| @Function(attributes = Attribute.NOT_ENUMERABLE) |
| public static Object __noSuchMethod__(final Object self, final Object... args) { |
| throw typeError("not.a.function", ScriptRuntime.safeToString(args[0])); |
| } |
| |
| @Override |
| public GuardedInvocation noSuchProperty(final CallSiteDescriptor desc, final LinkRequest request) { |
| return createAndSetProperty(desc) ? super.lookup(desc, request) : super.noSuchProperty(desc, request); |
| } |
| |
| @Override |
| public GuardedInvocation noSuchMethod(final CallSiteDescriptor desc, final LinkRequest request) { |
| return createAndSetProperty(desc) ? super.lookup(desc, request) : super.noSuchMethod(desc, request); |
| } |
| |
| @Override |
| protected Object invokeNoSuchProperty(final Object key, final boolean isScope, final int programPoint) { |
| if (!(key instanceof String)) { |
| return super.invokeNoSuchProperty(key, isScope, programPoint); |
| } |
| final Object retval = createProperty((String) key); |
| if (isValid(programPoint)) { |
| throw new UnwarrantedOptimismException(retval, programPoint); |
| } |
| return retval; |
| } |
| |
| private boolean createAndSetProperty(final CallSiteDescriptor desc) { |
| final String name = NashornCallSiteDescriptor.getOperand(desc); |
| final Object value = createProperty(name); |
| if(value != null) { |
| set(name, value, 0); |
| return true; |
| } |
| return false; |
| } |
| |
| private Object createProperty(final String name) { |
| final int len = args.length; |
| |
| for (int i = len - 1; i > -1; i--) { |
| final Object obj = args[i]; |
| |
| if (obj instanceof StaticClass) { |
| if (((StaticClass)obj).getRepresentedClass().getSimpleName().equals(name)) { |
| return obj; |
| } |
| } else if (obj instanceof NativeJavaPackage) { |
| final String pkgName = ((NativeJavaPackage)obj).getName(); |
| final String fullName = pkgName.isEmpty() ? name : (pkgName + "." + name); |
| final Context context = Global.instance().getContext(); |
| try { |
| return StaticClass.forClass(context.findClass(fullName)); |
| } catch (final ClassNotFoundException e) { |
| // IGNORE |
| } |
| } |
| } |
| return null; |
| } |
| } |