121 lines
4.2 KiB
Java
121 lines
4.2 KiB
Java
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Rhino code, released
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* May 6, 1999.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1997-1999 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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* Norris Boyd
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*
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* Alternatively, the contents of this file may be used under the
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* terms of the GNU Public License (the "GPL"), in which case the
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* provisions of the GPL are applicable instead of those above.
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* If you wish to allow use of your version of this file only
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* under the terms of the GPL and not to allow others to use your
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* version of this file under the NPL, indicate your decision by
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* deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL. If you do not delete
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* the provisions above, a recipient may use your version of this
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* file under either the NPL or the GPL.
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*/
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package org.mozilla.javascript;
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/**
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* This class implements the closure object.
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*
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* @author Norris Boyd
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*/
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public class NativeClosure extends ScriptableObject implements Function {
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public NativeClosure() {
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}
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public NativeClosure(Context cx, Scriptable scope, NativeFunction f) {
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setPrototype(f);
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setParentScope(scope);
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String name = f.names != null ? f.names[0] : "";
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if (name != null && name.length() > 0) {
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scope.put(name, scope, scope.getParentScope() == null
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? (Object) f : this);
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}
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}
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public String getClassName() {
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return "Closure";
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}
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public Object getDefaultValue(Class typeHint) {
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if (typeHint == ScriptRuntime.FunctionClass)
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return prototype;
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return super.getDefaultValue(typeHint);
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}
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public Object call(Context cx, Scriptable scope, Scriptable thisObj,
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Object[] args)
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throws JavaScriptException
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{
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Function proto = checkProto();
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return proto.call(cx, getParentScope(), thisObj, args);
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}
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public Scriptable construct(Context cx, Scriptable scope, Object[] args)
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throws JavaScriptException
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{
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Function proto = checkProto();
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return proto.construct(cx, getParentScope(), args);
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}
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public static Object jsConstructor(Context cx, Object[] args,
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Function ctorObj, boolean inNewExpr)
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{
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Object[] msgArgs = { "Closure" };
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throw Context.reportRuntimeError(
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Context.getMessage("msg.cant.call.indirect", msgArgs));
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}
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public static Object newClosureSpecial(Context cx, Scriptable varObj,
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Object[] args, Function ctorObj)
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{
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ScriptRuntime.checkDeprecated(cx, "Closure");
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NativeFunction f = args.length > 0 &&
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args[0] instanceof NativeFunction
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? (NativeFunction) args[0]
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: null;
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NativeClosure result = f != null
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? new NativeClosure(cx, varObj, f)
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: new NativeClosure();
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Scriptable scope = getTopLevelScope(ctorObj);
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result.setPrototype(args.length == 0
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? getObjectPrototype(scope)
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: ScriptRuntime.toObject(scope, args[0]));
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result.setParentScope(varObj);
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return result;
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}
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private Function checkProto() {
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Scriptable proto = getPrototype();
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if (!(proto instanceof Function)) {
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throw Context.reportRuntimeError(Context.getMessage
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("msg.closure.proto", null));
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}
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return (Function) proto;
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}
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}
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