package org.apache.maven.plugin.ear.util;

 /*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you under the Apache License, Version 2.0 (the

  * "License"); you may not use this file except in compliance

  * with the License.  You may obtain a copy of the License at

  *

  *  http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing,

  * software distributed under the License is distributed on an

  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

  * KIND, either express or implied.  See the License for the

  * specific language governing permissions and limitations

  * under the License.

  */

 import java.util.List;

 import java.util.Set;

 import org.apache.maven.archiver.MavenArchiveConfiguration;

 import org.apache.maven.archiver.MavenArchiver;

 import org.apache.maven.artifact.DependencyResolutionRequiredException;

 import org.apache.maven.plugin.ear.EarModule;

 import org.apache.maven.project.MavenProject;

 import org.codehaus.plexus.archiver.jar.Manifest;

 import org.codehaus.plexus.archiver.jar.ManifestException;

 /**

  * A custom {@link MavenArchiver} implementation that takes care

  * of setting the right classpath value according to the actual

  * path of bundled files.

  *

  * @author <a href="snicoll@apache.org">Stephane Nicoll</a>

  */

 public class EarMavenArchiver

     extends MavenArchiver

 {

     public static final String CLASS_PATH_KEY = "Class-Path";

     private final List<EarModule> earModules;

     /**

      * Creates an instance with the ear modules that will be packaged

      * in the EAR archive.

      *

      * @param earModules the intitialized list of ear modules

      */

     public EarMavenArchiver( List<EarModule> earModules )

     {

         this.earModules = earModules;

     }

     public Manifest getManifest( MavenProject project, MavenArchiveConfiguration config )

         throws ManifestException, DependencyResolutionRequiredException

     {

         final Manifest manifest = super.getManifest( project, config );

         if ( config.getManifest().isAddClasspath() )

         {

             String earManifestClassPathEntry = generateClassPathEntry( config.getManifest().getClasspathPrefix() );

             // Class-path can be customized. Let's make sure we don't overwrite this

             // with our custom change!

             final String userSuppliedClassPathEntry = getUserSuppliedClassPathEntry( config );

             if ( userSuppliedClassPathEntry != null )

             {

                 earManifestClassPathEntry = userSuppliedClassPathEntry + " " + earManifestClassPathEntry;

             }

             // Overwrite the existing one, if any

             final Manifest.Attribute classPathAttr = manifest.getMainSection().getAttribute( CLASS_PATH_KEY );

             if ( classPathAttr != null )

             {

                 classPathAttr.setValue( earManifestClassPathEntry );

             }

             else

             {

                 final Manifest.Attribute attr = new Manifest.Attribute( CLASS_PATH_KEY, earManifestClassPathEntry );

                 manifest.addConfiguredAttribute( attr );

             }

         }

         return manifest;

     }

     /**

      * Generates the <tt>Class-Path</tt> entry of the manifest according to

      * the list of ear modules.

      *

      * @param classPathPrefix the classpath prefix to use

      * @return the <tt>Class-Path</tt> entry

      */

     protected String generateClassPathEntry( String classPathPrefix )

     {

         final StringBuffer classpath = new StringBuffer();

         for ( final EarModule earModule : earModules )

         {

             if ( !earModule.isExcluded() )

             {

                 classpath.append( classPathPrefix ).append( earModule.getUri() ).append( " " );

             }

         }

         return classpath.toString().trim();

     }

     protected String getUserSuppliedClassPathEntry( MavenArchiveConfiguration config )

     {

         if ( config.getManifestEntries() != null )

         {

             @SuppressWarnings( "unchecked" )

             final Set<String> keys = config.getManifestEntries().keySet();

             for ( String key : keys )

             {

                 String value = (String) config.getManifestEntries().get( key );

                 if ( "Class-Path".equals( key ) && value != null )

                 {

                     return value;

                 }

             }

         }

         return null;

     }

 }