daveb 01/03/04 13:27:53
Added: src/java/org/apache/velocity/runtime/resource/loader
JarHolder.java
Log:
Jar Holder for the JarLoader.
Revision Changes Path
1.1
jakarta-velocity/src/java/org/apache/velocity/runtime/resource/loader/JarHolder.java
Index: JarHolder.java
===================================================================
package org.apache.velocity.runtime.resource.loader;
/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact [EMAIL PROTECTED]
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
import java.io.InputStream;
import java.io.IOException;
import java.net.JarURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Enumeration;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.Hashtable;
import org.apache.velocity.util.StringUtils;
import org.apache.velocity.runtime.Runtime;
import org.apache.velocity.runtime.configuration.Configuration;
import org.apache.velocity.runtime.resource.Resource;
import org.apache.velocity.exception.ResourceNotFoundException;
/**
* @author <a href="mailto:[EMAIL PROTECTED]">Dave Bryson</a>
* $Revision: 1.1 $
*/
public class JarHolder
{
private String urlpath = null;
private JarFile theJar = null;
private JarURLConnection conn = null;
public JarHolder( String urlpath )
{
this.urlpath=urlpath;
init();
Runtime.info("Initialized JAR: " + urlpath );
}
public void init()
{
try
{
URL url = new URL( urlpath );
conn = (JarURLConnection) url.openConnection();
conn.setAllowUserInteraction(false);
conn.setDoInput(true);
conn.setDoOutput(false);
conn.connect();
theJar = conn.getJarFile();
}
catch (Exception e)
{
Runtime.error("Error establishing connection to JAR "+ e);
}
}
public void close()
{
try
{
theJar.close();
}
catch ( Exception e )
{
Runtime.error("Error Closing JAR the file " + e);
}
theJar = null;
conn = null;
Runtime.info("JAR file closed");
}
public InputStream getResource( String theentry )
throws ResourceNotFoundException {
InputStream data = null;
try
{
JarEntry entry = theJar.getJarEntry( theentry );
if (entry == null)
{
Runtime.error( "JAR Entry NOT FOUND: " + entry );
}
else
{
data = theJar.getInputStream( entry );
}
}
catch( Exception fnfe )
{
Runtime.error("FileResourceLoader Error : exception : " + fnfe );
throw new ResourceNotFoundException( fnfe.getMessage() );
}
return data;
}
public Hashtable getEntries()
{
Hashtable allEntries = new Hashtable(559);
Enumeration all = theJar.entries();
while ( all.hasMoreElements() )
{
JarEntry je = (JarEntry)all.nextElement();
// We don't map plain directory entries
if ( !je.isDirectory() )
{
allEntries.put( je.getName(), this.urlpath );
}
}
return allEntries;
}
public String getUrlPath()
{
return urlpath;
}
}
