oracle.toplink.essentials.ejb.cmp3.persistence.JarInputStreamURLArchive Maven / Gradle / Ivy
/*
* The contents of this file are subject to the terms
* of the Common Development and Distribution License
* (the "License"). You may not use this file except
* in compliance with the License.
*
* You can obtain a copy of the license at
* glassfish/bootstrap/legal/CDDLv1.0.txt or
* https://glassfish.dev.java.net/public/CDDLv1.0.html.
* See the License for the specific language governing
* permissions and limitations under the License.
*
* When distributing Covered Code, include this CDDL
* HEADER in each file and include the License file at
* glassfish/bootstrap/legal/CDDLv1.0.txt. If applicable,
* add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your
* own identifying information: Portions Copyright [yyyy]
* [name of copyright owner]
*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
*/
package oracle.toplink.essentials.ejb.cmp3.persistence;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.logging.Logger;
import java.util.jar.JarInputStream;
import java.util.zip.ZipEntry;
/**
* This is an implementation of {@link Archive} which is used when container
* returns some form of URL from which an InputStream in jar format can be
* obtained. e.g. jar:file:/tmp/a_ear/b.war!/WEB-INF/lib/pu.jar
*
* @author [email protected]
*/
public class JarInputStreamURLArchive implements Archive {
private URL url;
private List entries = new ArrayList();
private Logger logger;
public JarInputStreamURLArchive(URL url) throws IOException {
this(url, Logger.global);
}
public JarInputStreamURLArchive(URL url, Logger logger) throws IOException {
logger.entering("JarInputStreamURLArchive", "JarInputStreamURLArchive", // NOI18N
new Object[]{url});
this.logger = logger;
this.url = url;
init();
}
private void init() throws IOException {
JarInputStream jis = new JarInputStream(
new BufferedInputStream(url.openStream()));
try {
do {
ZipEntry ze = jis.getNextEntry();
if (ze == null) {
break;
}
if (!ze.isDirectory()) {
entries.add(ze.getName());
}
} while (true);
} finally {
jis.close();
}
}
public Iterator getEntries() {
return entries.iterator();
}
public InputStream getEntry(String entryPath) throws IOException {
if (!entries.contains(entryPath)) {
return null;
}
JarInputStream jis = new JarInputStream(
new BufferedInputStream(url.openStream()));
do {
ZipEntry ze = jis.getNextEntry();
if (ze == null) {
break;
}
if (ze.getName().equals(entryPath)) {
return jis;
}
} while (true);
// don't close the stream, as the caller has to read from it.
assert(false); // should not reach here
return null;
}
public URL getEntryAsURL(String entryPath) throws IOException {
URL result = entries.contains(entryPath) ?
result = new URL("jar:"+url+"!/"+entryPath) : null; // NOI18N
return result;
}
public URL getRootURL() {
return url;
}
}