/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2008 by Sun Microsystems, Inc.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: ResourceProxy.java,v $
* $Revision: 1.6 $
*
* This file is part of OpenOffice.org.
*
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* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
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package com.sun.star.lib.sandbox;
import java.applet.AudioClip;
import java.awt.image.ImageProducer;
import java.io.InputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;
import java.net.MalformedURLException;
import java.util.Enumeration;
import java.util.Vector;
public class ResourceProxy implements Resource, Cachable {
private static final boolean DEBUG = false;
private static int instances;
static boolean isResource(URL url) {
boolean exists = false;
ResourceProxy resourceProxy = (ResourceProxy)WeakTable.get(url);
exists = resourceProxy != null;
if(!exists) { // not cache
// Check if the resource exists.
// It almost works to just try to do an openConnection() but
// HttpURLConnection will return true on HTTP_BAD_REQUEST
// when the requested name ends in ".html", ".htm", and ".txt"
// and we want to be able to handle these
//
// Also, cannot just open a connection for things like FileURLConnection,
// because they suceed when connecting to a non-existant file.
// So, in those cases we open and close an input stream.
try {
URLConnection conn = url.openConnection();
if (conn instanceof java.net.HttpURLConnection) {
java.net.HttpURLConnection hconn = (java.net.HttpURLConnection) conn;
int code = hconn.getResponseCode();
exists = (code == java.net.HttpURLConnection.HTTP_OK) || (code < java.net.HttpURLConnection.HTTP_BAD_REQUEST);
}
else {
// our best guess for the other cases
InputStream is = url.openStream();
is.close();
exists = true;
}
}
catch (Exception ex) {
}
}
return exists;
}
static public ResourceProxy load(URL url, ProtectionDomain protectionDomain) {
if(DEBUG) System.err.println("#### ResourceProxy.loadResource:" + url);
// protectionDomain = (protectionDomain == null)
// ? new ProtectionDomain(new CodeSource(url), new PermissionCollection())
// : protectionDomain;
ResourceProxy resourceProxy = (ResourceProxy)WeakTable.get(url);
if(resourceProxy == null) {
resourceProxy = new ResourceProxy(url, null, protectionDomain);
WeakTable.put(url, resourceProxy);
}
return resourceProxy;
}
static public ResourceProxy create(URL url, byte bytes[], ProtectionDomain protectionDomain) {
ResourceProxy resourceProxy = (ResourceProxy)WeakTable.get(url);
if(resourceProxy == null) {
resourceProxy = new ResourceProxy(url, bytes, protectionDomain);
WeakTable.put(url, resourceProxy);
}
else
System.err.println("WARNING! ResourceProxy.create - resource already loaded:" + resourceProxy);
return resourceProxy;
}
/*
** Members
*/
private Resource resource;
private WeakRef weakRef;
/*
** interface cachable methods
*/
public ResourceProxy() {
instances ++;
}
public Object getHardObject() {
return resource;
}
public void setWeakRef(WeakRef weakRef) {
this.resource = (Resource)weakRef.getRef();
this.weakRef = weakRef;
weakRef.incRefCnt();
}
public void finalize(){
weakRef.decRefCnt();
instances --;
}
/*
** resource methods
*/
private ResourceProxy(URL url, byte bytes[], ProtectionDomain protectionDomain) {
this();
resource = new ResourceImpl(url, bytes, protectionDomain);
}
public ProtectionDomain getProtectionDomain() {
return resource.getProtectionDomain();
}
public synchronized URL getURL() {
return resource.getURL();
}
public synchronized InputStream getInputStream() throws IOException {
return resource.getInputStream();
}
public synchronized byte[] getBytes() throws IOException {
return resource.getBytes();
}
public synchronized ImageProducer getImageProducer() {
ImageProducer imageProducer = resource.getImageProducer();
// This is due to a stupid bug in ImageConsumerQueue,
// which seems to be introduced in jdk1.3, which
// forbids me to use my own ImageProducer implementation.
// imageProducer = new ImageProducerProxy(imageProducer);
// Holder holder = (Holder)imageProducer;
// holder.addCargo(this);
return imageProducer;
}
public synchronized AudioClip getAudioClip() {
AudioClip audioClip = resource.getAudioClip();
audioClip = new AudioProxy(audioClip);
if(audioClip instanceof Holder) {
Holder holder = (Holder)audioClip;
holder.addCargo(this);
}
return audioClip;
}
public Object getContent() throws IOException {
Object content = resource.getContent();
if(content instanceof Holder)
((Holder)content).addCargo(this);
return content;
}
public void loadJar(URL url) throws IOException {
resource.loadJar(url);
}
}