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diff --git a/trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeGenerator.java b/trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeGenerator.java
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--- a/trunk/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeGenerator.java
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-/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
- *
- * ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * Contributor(s):
- * Norris Boyd
- *
- * Alternatively, the contents of this file may be used under the terms of
- * the GNU General Public License Version 2 or later (the "GPL"), in which
- * case the provisions of the GPL are applicable instead of those above. If
- * you wish to allow use of your version of this file only under the terms of
- * the GPL and not to allow others to use your version of this file under the
- * MPL, indicate your decision by deleting the provisions above and replacing
- * them with the notice and other provisions required by the GPL. If you do
- * not delete the provisions above, a recipient may use your version of this
- * file under either the MPL or the GPL.
- *
- * ***** END LICENSE BLOCK ***** */
-
-package org.mozilla.javascript;
-
-/**
- * This class implements generator objects. See
- * http://developer.mozilla.org/en/docs/New_in_JavaScript_1.7#Generators
- *
- * @author Norris Boyd
- */
-public final class NativeGenerator extends IdScriptableObject {
- private static final Object GENERATOR_TAG = new Object();
-
- static NativeGenerator init(ScriptableObject scope, boolean sealed) {
- // Generator
- // Can't use "NativeGenerator().exportAsJSClass" since we don't want
- // to define "Generator" as a constructor in the top-level scope.
-
- NativeGenerator prototype = new NativeGenerator();
- if (scope != null) {
- prototype.setParentScope(scope);
- prototype.setPrototype(getObjectPrototype(scope));
- }
- prototype.activatePrototypeMap(MAX_PROTOTYPE_ID);
- if (sealed) {
- prototype.sealObject();
- }
-
- // Need to access Generator prototype when constructing
- // Generator instances, but don't have a generator constructor
- // to use to find the prototype. Use the "associateValue"
- // approach instead.
- if (scope != null) {
- scope.associateValue(GENERATOR_TAG, prototype);
- }
-
- return prototype;
- }
-
- /**
- * Only for constructing the prototype object.
- */
- private NativeGenerator() { }
-
- public NativeGenerator(Scriptable scope, NativeFunction function,
- Object savedState)
- {
- this.function = function;
- this.savedState = savedState;
- // Set parent and prototype properties. Since we don't have a
- // "Generator" constructor in the top scope, we stash the
- // prototype in the top scope's associated value.
- Scriptable top = ScriptableObject.getTopLevelScope(scope);
- this.setParentScope(top);
- NativeGenerator prototype = (NativeGenerator)
- ScriptableObject.getTopScopeValue(top, GENERATOR_TAG);
- this.setPrototype(prototype);
- }
-
- public static final int GENERATOR_SEND = 0,
- GENERATOR_THROW = 1,
- GENERATOR_CLOSE = 2;
-
- public String getClassName() {
- return "Generator";
- }
-
- /**
- * Close the generator if it is still open.
- */
- public void finalize() throws Throwable {
- if (savedState != null) {
- // This is a little tricky since we are most likely running in
- // a different thread. We need to get a Context to run this, and
- // we must call "doTopCall" since this will likely be the outermost
- // JavaScript frame on this thread.
- Context cx = Context.getCurrentContext();
- ContextFactory factory = cx != null ? cx.getFactory()
- : ContextFactory.getGlobal();
- Scriptable scope = ScriptableObject.getTopLevelScope(this);
- factory.call(new CloseGeneratorAction(this));
- }
- }
-
- private static class CloseGeneratorAction implements ContextAction {
- private NativeGenerator generator;
-
- CloseGeneratorAction(NativeGenerator generator) {
- this.generator = generator;
- }
-
- public Object run(Context cx) {
- Scriptable scope = ScriptableObject.getTopLevelScope(generator);
- Callable closeGenerator = new Callable() {
- public Object call(Context cx, Scriptable scope,
- Scriptable thisObj, Object[] args) {
- return ((NativeGenerator)thisObj).resume(cx, scope,
- GENERATOR_CLOSE, new GeneratorClosedException());
- }
- };
- return ScriptRuntime.doTopCall(closeGenerator, cx, scope,
- generator, null);
- }
- }
-
- protected void initPrototypeId(int id) {
- String s;
- int arity;
- switch (id) {
- case Id_close: arity=1; s="close"; break;
- case Id_next: arity=1; s="next"; break;
- case Id_send: arity=0; s="send"; break;
- case Id_throw: arity=0; s="throw"; break;
- case Id___iterator__: arity=1; s="__iterator__"; break;
- default: throw new IllegalArgumentException(String.valueOf(id));
- }
- initPrototypeMethod(GENERATOR_TAG, id, s, arity);
- }
-
- public Object execIdCall(IdFunctionObject f, Context cx, Scriptable scope,
- Scriptable thisObj, Object[] args)
- {
- if (!f.hasTag(GENERATOR_TAG)) {
- return super.execIdCall(f, cx, scope, thisObj, args);
- }
- int id = f.methodId();
-
- if (!(thisObj instanceof NativeGenerator))
- throw incompatibleCallError(f);
-
- NativeGenerator generator = (NativeGenerator) thisObj;
-
- switch (id) {
-
- case Id_close:
- // need to run any pending finally clauses
- return generator.resume(cx, scope, GENERATOR_CLOSE,
- new GeneratorClosedException());
-
- case Id_next:
- // arguments to next() are ignored
- generator.firstTime = false;
- return generator.resume(cx, scope, GENERATOR_SEND,
- Undefined.instance);
-
- case Id_send: {
- Object arg = args.length > 0 ? args[0] : Undefined.instance;
- if (generator.firstTime && !arg.equals(Undefined.instance)) {
- throw ScriptRuntime.typeError0("msg.send.newborn");
- }
- return generator.resume(cx, scope, GENERATOR_SEND, arg);
- }
-
- case Id_throw:
- return generator.resume(cx, scope, GENERATOR_THROW,
- args.length > 0 ? args[0] : Undefined.instance);
-
- case Id___iterator__:
- return thisObj;
-
- default:
- throw new IllegalArgumentException(String.valueOf(id));
- }
- }
-
- private Object resume(Context cx, Scriptable scope, int operation,
- Object value)
- {
- if (savedState == null) {
- if (operation == GENERATOR_CLOSE)
- return Undefined.instance;
- Object thrown;
- if (operation == GENERATOR_THROW) {
- thrown = value;
- } else {
- thrown = NativeIterator.getStopIterationObject(scope);
- }
- throw new JavaScriptException(thrown, lineSource, lineNumber);
- }
- try {
- synchronized (this) {
- // generator execution is necessarily single-threaded and
- // non-reentrant.
- // See https://bugzilla.mozilla.org/show_bug.cgi?id=349263
- if (locked)
- throw ScriptRuntime.typeError0("msg.already.exec.gen");
- locked = true;
- }
- return function.resumeGenerator(cx, scope, operation, savedState,
- value);
- } catch (GeneratorClosedException e) {
- // On closing a generator in the compile path, the generator
- // throws a special exception. This ensures execution of all pending
- // finalizers and will not get caught by user code.
- return Undefined.instance;
- } catch (RhinoException e) {
- lineNumber = e.lineNumber();
- lineSource = e.lineSource();
- savedState = null;
- throw e;
- } finally {
- synchronized (this) {
- locked = false;
- }
- if (operation == GENERATOR_CLOSE)
- savedState = null;
- }
- }
-
-// #string_id_map#
-
- protected int findPrototypeId(String s) {
- int id;
-// #generated# Last update: 2007-06-14 13:13:03 EDT
- L0: { id = 0; String X = null; int c;
- int s_length = s.length();
- if (s_length==4) {
- c=s.charAt(0);
- if (c=='n') { X="next";id=Id_next; }
- else if (c=='s') { X="send";id=Id_send; }
- }
- else if (s_length==5) {
- c=s.charAt(0);
- if (c=='c') { X="close";id=Id_close; }
- else if (c=='t') { X="throw";id=Id_throw; }
- }
- else if (s_length==12) { X="__iterator__";id=Id___iterator__; }
- if (X!=null && X!=s && !X.equals(s)) id = 0;
- break L0;
- }
-// #/generated#
- return id;
- }
-
- private static final int
- Id_close = 1,
- Id_next = 2,
- Id_send = 3,
- Id_throw = 4,
- Id___iterator__ = 5,
- MAX_PROTOTYPE_ID = 5;
-
-// #/string_id_map#
- private NativeFunction function;
- private Object savedState;
- private String lineSource;
- private int lineNumber;
- private boolean firstTime = true;
- private boolean locked;
-
- public static class GeneratorClosedException extends RuntimeException {
- }
-}
generated by cgit v1.2.3-1-g7c22 (git 2.25.1) at 2024-06-27 21:26:24 +0000