/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- * * The contents of this file are subject to the Netscape 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/NPL/ * * 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. * * The Original Code is Rhino code, released * May 6, 1999. * * The Initial Developer of the Original Code is Netscape * Communications Corporation.  Portions created by Netscape are * Copyright (C) 1997-1999 Netscape Communications Corporation. All * Rights Reserved. * * Contributor(s): * Norris Boyd * Igor Bukanov * Roger Lawrence * Mike McCabe * * Alternatively, the contents of this file may be used under the * terms of the GNU Public License (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 NPL, indicate your decision by * deleting the provisions above and replace 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 NPL or the GPL. */package org.mozilla.javascript;import org.mozilla.javascript.debug.DebuggableScript;/** * This class implements the Function native object. * See ECMA 15.3. * @author Norris Boyd */public abstract class NativeFunction extends BaseFunction{    public final void initScriptFunction(Context cx, Scriptable scope)    {        ScriptRuntime.setFunctionProtoAndParent(this, scope);    }    /**     * @param indent How much to indent the decompiled result     *     * @param flags Flags specifying format of decompilation output     */    final String decompile(int indent, int flags)    {        String encodedSource = getEncodedSource();        if (encodedSource == null) {            return super.decompile(indent, flags);        } else {            UintMap properties = new UintMap(1);            properties.put(Decompiler.INITIAL_INDENT_PROP, indent);            return Decompiler.decompile(encodedSource, flags, properties);        }    }    public int getLength()    {        int paramCount = getParamCount();        if (getLanguageVersion() != Context.VERSION_1_2) {            return paramCount;        }        Context cx = Context.getContext();        NativeCall activation = ScriptRuntime.findFunctionActivation(cx, this);        if (activation == null) {            return paramCount;        }        return activation.originalArgs.length;    }    public int getArity()    {        return getParamCount();    }    /**     * @deprecated Use {@link BaseFunction#getFunctionName()} instead.     * For backwards compatibility keep an old method name used by     * Batik and possibly others.     */    public String jsGet_name()    {        return getFunctionName();    }    /**     * Get encoded source string.     */    public String getEncodedSource()    {        return null;    }    public DebuggableScript getDebuggableView()    {        return null;    }    protected abstract int getLanguageVersion();    /**     * Get number of declared parameters. It should be 0 for scripts.     */    protected abstract int getParamCount();    /**     * Get number of declared parameters and variables defined through var     * statements.     */    protected abstract int getParamAndVarCount();    /**     * Get parameter or variable name.     * If <tt>index < {@link #getParamCount()}</tt>, then return the name of the     * corresponding parameter. Otherwise returm the name of variable.     */    protected abstract String getParamOrVarName(int index);}