/*
* JBoss, Home of Professional Open Source
* Copyright 2006, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This 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 software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.deployers.vfs.spi.deployer;

import java.util.jar.Manifest;

import org.jboss.deployers.vfs.spi.structure.VFSDeploymentUnit;
import org.jboss.virtual.VFSUtils;
import org.jboss.virtual.VirtualFile;

/**
 * Parse manifest.mf file.
 * Prepare metadata from manifest's attributes.
 *
 * @param <T> the expected manifest type
 * @author <a href="mailto:ales.justin@jboss.com">Ales Justin</a>
 */
public abstract class ManifestDeployer<T extends ManifestMetaData> extends AbstractVFSParsingDeployer<T>
{
   /**
    * Create a new ManifestDeployer
    * 
    * @param output the output
    * @throws IllegalArgumentException for a null output
    */
   protected ManifestDeployer(Class<T> output)
   {
      super(output);
      setName("MANIFEST.MF");
   }

   /**
    * Create MetaData
    * 
    * @param manifest the manifest
    * @return the metadata
    * @throws Exception for any error
    */
   protected abstract T createMetaData(Manifest manifest) throws Exception;

   @Override
   protected T parse(VFSDeploymentUnit unit, VirtualFile file, T root) throws Exception
   {
      Manifest manifest = VFSUtils.readManifest(file);
      return createMetaData(manifest);
   }
}