// ========================================================================
// Copyright 1996-2005 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ========================================================================
package org.mortbay.resource;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.JarURLConnection;
import java.net.URL;
import java.util.jar.JarEntry;
import java.util.jar.JarInputStream;
import org.mortbay.log.Log;
import org.mortbay.util.IO;
/* ------------------------------------------------------------ */
public class JarResource extends URLResource
{
protected transient JarURLConnection _jarConnection;
/* -------------------------------------------------------- */
JarResource(URL url)
{
super(url,null);
}
/* ------------------------------------------------------------ */
JarResource(URL url, boolean useCaches)
{
super(url, null, useCaches);
}
/* ------------------------------------------------------------ */
public synchronized void release()
{
_jarConnection=null;
super.release();
}
/* ------------------------------------------------------------ */
protected boolean checkConnection()
{
super.checkConnection();
try
{
if (_jarConnection!=_connection)
newConnection();
}
catch(IOException e)
{
Log.ignore(e);
_jarConnection=null;
}
return _jarConnection!=null;
}
/* ------------------------------------------------------------ */
/**
* @throws IOException Sub-classes of <code>JarResource</code> may throw an IOException (or subclass)
*/
protected void newConnection() throws IOException
{
_jarConnection=(JarURLConnection)_connection;
}
/* ------------------------------------------------------------ */
/**
* Returns true if the respresenetd resource exists.
*/
public boolean exists()
{
if (_urlString.endsWith("!/"))
return checkConnection();
else
return super.exists();
}
/* ------------------------------------------------------------ */
public File getFile()
throws IOException
{
return null;
}
/* ------------------------------------------------------------ */
public InputStream getInputStream()
throws java.io.IOException
{
checkConnection();
if (!_urlString.endsWith("!/"))
return new FilterInputStream(super.getInputStream())
{
public void close() throws IOException {this.in=IO.getClosedStream();}
};
URL url = new URL(_urlString.substring(4,_urlString.length()-2));
InputStream is = url.openStream();
return is;
}
/* ------------------------------------------------------------ */
public static void extract(Resource resource, File directory, boolean deleteOnExit)
throws IOException
{
if(Log.isDebugEnabled())Log.debug("Extract "+resource+" to "+directory);
String urlString = resource.getURL().toExternalForm().trim();
int endOfJarUrl = urlString.indexOf("!/");
int startOfJarUrl = (endOfJarUrl >= 0?4:0);
if (endOfJarUrl < 0)
throw new IOException("Not a valid jar url: "+urlString);
URL jarFileURL = new URL(urlString.substring(startOfJarUrl, endOfJarUrl));
String subEntryName = (endOfJarUrl+2 < urlString.length() ? urlString.substring(endOfJarUrl + 2) : null);
boolean subEntryIsDir = (subEntryName != null && subEntryName.endsWith("/")?true:false);
if (Log.isDebugEnabled()) Log.debug("Extracting entry = "+subEntryName+" from jar "+jarFileURL);
InputStream is = jarFileURL.openConnection().getInputStream();
JarInputStream jin = new JarInputStream(is);
JarEntry entry;
boolean shouldExtract;
while((entry=jin.getNextJarEntry())!=null)
{
String entryName = entry.getName();
if ((subEntryName != null) && (entryName.startsWith(subEntryName)))
{
//if there is a particular subEntry that we are looking for, only
//extract it.
if (subEntryIsDir)
{
//if it is a subdirectory we are looking for, then we
//are looking to extract its contents into the target
//directory. Remove the name of the subdirectory so
//that we don't wind up creating it too.
entryName = entryName.substring(subEntryName.length());
if (!entryName.equals(""))
{
//the entry is
shouldExtract = true;
}
else
shouldExtract = false;
}
else
shouldExtract = true;
}
else if ((subEntryName != null) && (!entryName.startsWith(subEntryName)))
{
//there is a particular entry we are looking for, and this one
//isn't it
shouldExtract = false;
}
else
{
//we are extracting everything
shouldExtract = true;
}
if (!shouldExtract)
{
if (Log.isDebugEnabled()) Log.debug("Skipping entry: "+entryName);
continue;
}
File file=new File(directory,entryName);
if (entry.isDirectory())
{
// Make directory
if (!file.exists())
file.mkdirs();
}
else
{
// make directory (some jars don't list dirs)
File dir = new File(file.getParent());
if (!dir.exists())
dir.mkdirs();
// Make file
FileOutputStream fout = null;
try
{
fout = new FileOutputStream(file);
IO.copy(jin,fout);
}
finally
{
IO.close(fout);
}
// touch the file.
if (entry.getTime()>=0)
file.setLastModified(entry.getTime());
}
if (deleteOnExit)
file.deleteOnExit();
}
}
/* ------------------------------------------------------------ */
public void extract(File directory, boolean deleteOnExit)
throws IOException
{
extract(this,directory,deleteOnExit);
}
}