/*

  * 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.

  */

 package org.apache.maven.plugin.eclipse.osgiplugin;

 import java.io.File;

 import java.io.IOException;

 import java.io.InputStream;

 import java.util.Properties;

 import java.util.jar.JarFile;

 import java.util.zip.ZipEntry;

 /**

  * Common functionality for both exploded and packaged plugins.

  * 

  * @author <a href="mailto:carlos@apache.org">Carlos Sanchez</a>

  * @version $Id: AbstractEclipseOsgiPlugin.java 728546 2008-12-21 22:56:51Z bentmann $

  */

 public abstract class AbstractEclipseOsgiPlugin

     implements EclipseOsgiPlugin

 {

     private File file;

     private Properties pluginProperties;

     public AbstractEclipseOsgiPlugin( File file )

     {

         this.setFile( file );

     }

     public void setFile( File file )

     {

         this.file = file;

     }

     public File getFile()

     {

         return file;

     }

     public String toString()

     {

         return getFile().getAbsolutePath();

     }

     public Properties getPluginProperties()

         throws IOException

     {

         if ( pluginProperties == null )

         {

             JarFile file = getJar();

             InputStream pluginPropertiesStream = null;

             try

             {

                 pluginProperties = new Properties();

                 ZipEntry jarEntry = file.getEntry( "plugin.properties" );

                 if ( jarEntry != null )

                 {

                     pluginPropertiesStream = file.getInputStream( jarEntry );

                     pluginProperties.load( pluginPropertiesStream );

                 }

             }

             finally

             {

                 if ( pluginPropertiesStream != null )

                 {

                     try

                     {

                         pluginPropertiesStream.close();

                     }

                     catch ( IOException e )

                     {

                         // ignore

                     }

                 }

             }

         }

         return pluginProperties;

     }

     public Properties getPomProperties()

     {

         return new Properties();

     }

     public String getManifestAttribute( String key )

         throws IOException

     {

         String value = getManifest().getMainAttributes().getValue( key );

         if ( value == null )

         {

             return null;

         }

         /* check the plugin properties for translations */

         if ( value.startsWith( "%" ) )

         {

             String valueFromProperties = getPluginProperties().getProperty( value.substring( 1 ) );

             if ( valueFromProperties != null )

             {

                 value = valueFromProperties;

             }

         }

         return value;

     }

 }