/*************************************************************************
 *
 *  $RCSfile: ClassContextProxy.java,v $
 *
 *  $Revision: 1.3 $
 *
 *  last change: $Author: kz $ $Date: 2004-12-16 11:42:00 $
 *
 *  The Contents of this file are made available subject to the terms of
 *  either of the following licenses
 *
 *         - GNU Lesser General Public License Version 2.1
 *         - Sun Industry Standards Source License Version 1.1
 *
 *  Sun Microsystems Inc., October, 2000
 *
 *  GNU Lesser General Public License Version 2.1
 *  =============================================
 *  Copyright 2000 by Sun Microsystems, Inc.
 *  901 San Antonio Road, Palo Alto, CA 94303, USA
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License version 2.1, as published by the Free Software Foundation.
 *
 *  This library 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
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *  MA  02111-1307  USA
 *
 *
 *  Sun Industry Standards Source License Version 1.1
 *  =================================================
 *  The contents of this file are subject to the Sun Industry Standards
 *  Source 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.openoffice.org/license.html.
 *
 *  Software provided under this License is provided on an "AS IS" basis,
 *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
 *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
 *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
 *  See the License for the specific provisions governing your rights and
 *  obligations concerning the Software.
 *
 *  The Initial Developer of the Original Code is: Sun Microsystems, Inc.
 *
 *  Copyright: 2000 by Sun Microsystems, Inc.
 *
 *  All Rights Reserved.
 *
 *  Contributor(s): _______________________________________
 *
 *
 ************************************************************************/

package com.sun.star.lib.sandbox;

import java.awt.Toolkit;
import java.awt.Image;

import java.io.IOException;
import java.io.InputStream;
import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;

import java.net.URL;
import java.net.URLConnection;
import java.net.MalformedURLException;

import java.util.Hashtable;
import java.util.zip.ZipEntry;

public final class ClassContextProxy implements ClassContext, Cachable {
    private static int instances;
    private static final boolean DEBUG = false;

    /*
    ** interface cachable methods
    */
    private ClassContext classContext;
    private WeakRef weakRef;

    public ClassContextProxy() {
        instances ++;
    }

    public Object getHardObject() {
        return classContext;
    }

    public void setWeakRef(WeakRef weakRef) {
        classContext = (ClassContext)weakRef.getRef();
        base = classContext.getBase();

        this.weakRef = weakRef;
        weakRef.incRefCnt();
    }

    public void finalize() {
        weakRef.decRefCnt();

        instances --;
    }

    /*
    ** ClassContext methods
    */
    private URL base;


    public static ClassContext create(URL base, ProtectionDomain protectionDomain, ThreadGroup threadGroup) {
        return create(base, protectionDomain, threadGroup, false);
    }

    public static ClassContext create(URL base, ProtectionDomain protectionDomain, ThreadGroup threadGroup, boolean bSecure) {
        Object object = WeakTable.get("ClassContxt: " + base);
        if(DEBUG) System.err.println("#### ClassContextProxy.create:" + object);
        ClassContextProxy classContextProxy = (ClassContextProxy)object;

        if(classContextProxy == null) {
            classContextProxy = new ClassContextProxy(base, protectionDomain, threadGroup, bSecure);
            WeakTable.put("ClassContxt: " + base, classContextProxy);
        }

        return classContextProxy;
    }

    private ClassContextProxy(URL base, ProtectionDomain protectionDomain, ThreadGroup threadGroup, boolean bSecure) {
        this();

        this.base = base;

        classContext = new ClassContextImpl(base, protectionDomain, threadGroup, bSecure);
    }

    public ClassLoader getClassLoader() {
        return classContext.getClassLoader();
    }

    public boolean hasThreadGroup() {
        return classContext.hasThreadGroup();
    }

    public ThreadGroup getThreadGroup() {
        return classContext.getThreadGroup();
    }

    public URL getBase() {
        return classContext.getBase();
    }

    public InputStream getResourceAsStream(String name) {
        return classContext.getResourceAsStream(name);
    }

    public URL getResource(String name) {
        return classContext.getResource(name);
    }

    public void addCargo( Object cargo ) {
        classContext.addCargo( cargo );
    }

    public void dispose() { // HIER SOLLTE VIELLEICHT NOCH MEHR GETAN WERDEN?
        classContext.dispose();
    }

    public synchronized Class findClass(String className) throws ClassNotFoundException {
        return classContext.findClass(className);
    }

    public synchronized Class loadClass(String className) throws ClassNotFoundException {
        return classContext.loadClass(className);
    }
}

