/**
 * Copyright (c) 2015, Lucee Assosication Switzerland. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either 
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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 library.  If not, see <http://www.gnu.org/licenses/>.
 * 
 */
package lucee.runtime.osgi;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.jar.JarFile;

import lucee.commons.io.IOUtil;
import lucee.commons.io.res.Resource;
import lucee.commons.lang.ExceptionUtil;

import org.osgi.framework.BundleException;

public class BundleFile extends BundleInfo {
	

	private File file;

	public BundleFile(Resource file) throws IOException, BundleException {
		this(toFileResource(file));
	}
	
	public BundleFile(File file) throws IOException, BundleException {
		super(file);
		this.file=file;
	}

	public InputStream getInputStream() throws IOException {
		return new FileInputStream(file);
	}
	

	public File getFile() {
		return file;
	}

	public boolean hasClass(String className) throws IOException {
		JarFile jar=new JarFile(file);
		try {
			return jar.getEntry(className.replace('.', '/')+".class")!=null;
		}
		finally {
			IOUtil.closeEL(jar);
		}
	}
	
	/**
	 * only return a instance if the Resource is a valid bundle, otherwise it returns null
	 * @param res
	 * @return
	 */
	public static BundleFile newInstance(Resource res) {
		
		try {
			BundleFile bf = new BundleFile(res);
			if(bf.isBundle()) return bf;
		}
		catch(Throwable t) {ExceptionUtil.rethrowIfNecessary(t);}
		
		return null;
	}
}