Hibernate example source code file (FileZippedJarVisitor.java)

This example Hibernate source code file (FileZippedJarVisitor.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Hibernate tags/keywords

bufferedinputstream, bufferedinputstream, bytearrayinputstream, filezippedjarvisitor, filter, io, ioexception, jar, jarfile, jarfile, jarinputstream, log, net, network, string, string, util, zip, zipentry, zipentry

The Hibernate FileZippedJarVisitor.java source code

/*
 * Copyright (c) 2009, Red Hat Middleware LLC or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Middleware LLC.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program 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 distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.hibernate.ejb.packaging;
import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.Enumeration;
import java.util.jar.JarFile;
import java.util.jar.JarInputStream;
import java.util.zip.ZipEntry;

import org.hibernate.ejb.internal.EntityManagerMessageLogger;

import org.jboss.logging.Logger;

/**
 * Work on a JAR that can be accessed through a File
 *
 * @author Emmanuel Bernard
 */
public class FileZippedJarVisitor extends AbstractJarVisitor {

    private static final EntityManagerMessageLogger LOG = Logger.getMessageLogger(EntityManagerMessageLogger.class,
                                                                           FileZippedJarVisitor.class.getName());

    private String entry;

	public FileZippedJarVisitor(String fileName, Filter[] filters) {
		super( fileName, filters );
	}

	public FileZippedJarVisitor(URL url, Filter[] filters, String entry) {
		super( url, filters );
		this.entry = entry;
	}

	@Override
    protected void doProcessElements() throws IOException {
		JarFile jarFile;
		try {
			String filePart = jarUrl.getFile();
			if ( filePart != null && filePart.indexOf( ' ' ) != -1 ) {
				//unescaped (from the container), keep as is
				jarFile = new JarFile( jarUrl.getFile() );
			}
			else {
				jarFile = new JarFile( jarUrl.toURI().getSchemeSpecificPart() );
			}
		}
		catch (IOException ze) {
            LOG.unableToFindFile(jarUrl, ze);
			return;
		}
		catch (URISyntaxException e) {
            LOG.malformedUrlWarning(jarUrl, e);
			return;
		}

		if ( entry != null && entry.length() == 1 ) entry = null; //no entry
		if ( entry != null && entry.startsWith( "/" ) ) entry = entry.substring( 1 ); //remove '/' header

		Enumeration<? extends ZipEntry> entries = jarFile.entries();
		while ( entries.hasMoreElements() ) {
			ZipEntry zipEntry = entries.nextElement();
			String name = zipEntry.getName();
			if ( entry != null && ! name.startsWith( entry ) ) continue; //filter it out
			if ( !zipEntry.isDirectory() ) {
				if ( name.equals( entry ) ) {
					//exact match, might be a nested jar entry (ie from jar:file:..../foo.ear!/bar.jar)
					/*
					 * This algorithm assumes that the zipped file is only the URL root (including entry), not just any random entry
					 */
					InputStream is = null;
					try {
						is = new BufferedInputStream( jarFile.getInputStream( zipEntry ) );
						JarInputStream jis = new JarInputStream( is );
						ZipEntry subZipEntry = jis.getNextEntry();
						while (subZipEntry != null) {
							if ( ! subZipEntry.isDirectory() ) {
								//FIXME copy sucks
								byte[] entryBytes = JarVisitorFactory.getBytesFromInputStream( jis );
								String subname = subZipEntry.getName();
								if ( subname.startsWith( "/" ) ) subname = subname.substring( 1 );
								addElement(
										subname,
										new ByteArrayInputStream(entryBytes),
										new ByteArrayInputStream(entryBytes)
								);
							}
							subZipEntry = jis.getNextEntry();
						}
					}
					finally {
						if ( is != null) is.close();
					}
				}
				else {
					//build relative name
					if (entry != null) name = name.substring( entry.length() );
					if ( name.startsWith( "/" ) ) name = name.substring( 1 );
					addElement(
							name,
							new BufferedInputStream( jarFile.getInputStream( zipEntry ) ),
							new BufferedInputStream( jarFile.getInputStream( zipEntry ) )
					);
				}
			}
		}
	}
}