From 89bda83e0570ab87c6e449f5955613d5385e90b3 Mon Sep 17 00:00:00 2001 From: "alexanders@b2ef00c0-3703-41da-baef-cfe82387ac0c" Date: Wed, 3 Feb 2010 00:50:41 +0000 Subject: removed obsolete svn folder from hg tree --HG-- extra : convert_revision : svn%3Ab2ef00c0-3703-41da-baef-cfe82387ac0c/trunk%408 --- .../src/org/mozilla/javascript/NativeIterator.java | 260 +++++++++++++++++++++ 1 file changed, 260 insertions(+) create mode 100644 infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeIterator.java (limited to 'infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeIterator.java') diff --git a/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeIterator.java b/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeIterator.java new file mode 100644 index 0000000..c61f417 --- /dev/null +++ b/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeIterator.java @@ -0,0 +1,260 @@ +/* -*- 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; + +import java.util.Iterator; + +/** + * This class implements iterator objects. See + * http://developer.mozilla.org/en/docs/New_in_JavaScript_1.7#Iterators + * + * @author Norris Boyd + */ +public final class NativeIterator extends IdScriptableObject { + private static final Object ITERATOR_TAG = new Object(); + + static void init(ScriptableObject scope, boolean sealed) { + // Iterator + NativeIterator iterator = new NativeIterator(); + iterator.exportAsJSClass(MAX_PROTOTYPE_ID, scope, sealed); + + // Generator + NativeGenerator.init(scope, sealed); + + // StopIteration + NativeObject obj = new StopIteration(); + obj.setPrototype(getObjectPrototype(scope)); + obj.setParentScope(scope); + if (sealed) { obj.sealObject(); } + ScriptableObject.defineProperty(scope, STOP_ITERATION, obj, + ScriptableObject.DONTENUM); + // Use "associateValue" so that generators can continue to + // throw StopIteration even if the property of the global + // scope is replaced or deleted. + scope.associateValue(ITERATOR_TAG, obj); + } + + /** + * Only for constructing the prototype object. + */ + private NativeIterator() { + } + + private NativeIterator(Object objectIterator) { + this.objectIterator = objectIterator; + } + + /** + * Get the value of the "StopIteration" object. Note that this value + * is stored in the top-level scope using "associateValue" so the + * value can still be found even if a script overwrites or deletes + * the global "StopIteration" property. + * @param scope a scope whose parent chain reaches a top-level scope + * @return the StopIteration object + */ + public static Object getStopIterationObject(Scriptable scope) { + Scriptable top = ScriptableObject.getTopLevelScope(scope); + return ScriptableObject.getTopScopeValue(top, ITERATOR_TAG); + } + + private static final String STOP_ITERATION = "StopIteration"; + public static final String ITERATOR_PROPERTY_NAME = "__iterator__"; + + static class StopIteration extends NativeObject { + public String getClassName() { + return STOP_ITERATION; + } + + /* StopIteration has custom instanceof behavior since it + * doesn't have a constructor. + */ + public boolean hasInstance(Scriptable instance) { + return instance instanceof StopIteration; + } + } + + public String getClassName() { + return "Iterator"; + } + + protected void initPrototypeId(int id) { + String s; + int arity; + switch (id) { + case Id_constructor: arity=2; s="constructor"; break; + case Id_next: arity=0; s="next"; break; + case Id___iterator__: arity=1; s=ITERATOR_PROPERTY_NAME; break; + default: throw new IllegalArgumentException(String.valueOf(id)); + } + initPrototypeMethod(ITERATOR_TAG, id, s, arity); + } + + public Object execIdCall(IdFunctionObject f, Context cx, Scriptable scope, + Scriptable thisObj, Object[] args) + { + if (!f.hasTag(ITERATOR_TAG)) { + return super.execIdCall(f, cx, scope, thisObj, args); + } + int id = f.methodId(); + + if (id == Id_constructor) { + return jsConstructor(cx, scope, thisObj, args); + } + + if (!(thisObj instanceof NativeIterator)) + throw incompatibleCallError(f); + + NativeIterator iterator = (NativeIterator) thisObj; + + switch (id) { + + case Id_next: + return iterator.next(cx, scope); + + case Id___iterator__: + /// XXX: what about argument? SpiderMonkey apparently ignores it + return thisObj; + + default: + throw new IllegalArgumentException(String.valueOf(id)); + } + } + + /* the javascript constructor */ + private static Object jsConstructor(Context cx, Scriptable scope, + Scriptable thisObj, Object[] args) + { + if (args.length == 0 || args[0] == null || + args[0] == Undefined.instance) + { + throw ScriptRuntime.typeError1("msg.no.properties", + ScriptRuntime.toString(args[0])); + } + Scriptable obj = ScriptRuntime.toObject(scope, args[0]); + boolean keyOnly = args.length > 1 && ScriptRuntime.toBoolean(args[1]); + if (thisObj != null) { + // Called as a function. Convert to iterator if possible. + + // For objects that implement java.lang.Iterable or + // java.util.Iterator, have JavaScript Iterator call the underlying + // iteration methods + Iterator iterator = + VMBridge.instance.getJavaIterator(cx, scope, obj); + if (iterator != null) { + scope = ScriptableObject.getTopLevelScope(scope); + return cx.getWrapFactory().wrap(cx, scope, + new WrappedJavaIterator(iterator, scope), + WrappedJavaIterator.class); + } + + // Otherwise, just call the runtime routine + Scriptable jsIterator = ScriptRuntime.toIterator(cx, scope, obj, + keyOnly); + if (jsIterator != null) { + return jsIterator; + } + } + + // Otherwise, just set up to iterate over the properties of the object. + // Do not call __iterator__ method. + Object objectIterator = ScriptRuntime.enumInit(obj, cx, + keyOnly ? ScriptRuntime.ENUMERATE_KEYS_NO_ITERATOR + : ScriptRuntime.ENUMERATE_ARRAY_NO_ITERATOR); + ScriptRuntime.setEnumNumbers(objectIterator, true); + NativeIterator result = new NativeIterator(objectIterator); + result.setPrototype(NativeIterator.getClassPrototype(scope, + result.getClassName())); + result.setParentScope(scope); + return result; + } + + private Object next(Context cx, Scriptable scope) { + Boolean b = ScriptRuntime.enumNext(this.objectIterator); + if (!b.booleanValue()) { + // Out of values. Throw StopIteration. + throw new JavaScriptException( + NativeIterator.getStopIterationObject(scope), null, 0); + } + return ScriptRuntime.enumId(this.objectIterator, cx); + } + + static public class WrappedJavaIterator + { + WrappedJavaIterator(Iterator iterator, Scriptable scope) { + this.iterator = iterator; + this.scope = scope; + } + + public Object next() { + if (!iterator.hasNext()) { + // Out of values. Throw StopIteration. + throw new JavaScriptException( + NativeIterator.getStopIterationObject(scope), null, 0); + } + return iterator.next(); + } + + public Object __iterator__(boolean b) { + return this; + } + + private Iterator iterator; + private Scriptable scope; + } + +// #string_id_map# + + protected int findPrototypeId(String s) { + int id; +// #generated# Last update: 2007-06-11 09:43:19 EDT + L0: { id = 0; String X = null; + int s_length = s.length(); + if (s_length==4) { X="next";id=Id_next; } + else if (s_length==11) { X="constructor";id=Id_constructor; } + 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_constructor = 1, + Id_next = 2, + Id___iterator__ = 3, + MAX_PROTOTYPE_ID = 3; + +// #/string_id_map# + + private Object objectIterator; +} + -- cgit v1.2.3