package org.apache.maven.plugin.coreit;

 /*

  * 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 org.apache.maven.artifact.manager.WagonManager;

 import org.apache.maven.plugin.AbstractMojo;

 import org.apache.maven.plugin.MojoExecutionException;

 import org.apache.maven.plugin.MojoFailureException;

 import org.apache.maven.wagon.Wagon;

 import org.apache.maven.wagon.repository.Repository;

 import java.io.File;

 import java.io.FileOutputStream;

 import java.io.IOException;

 import java.io.OutputStream;

 import java.util.Properties;

 /**

  * Loads resources from a class loader used to load a wagon provider. The wagon is merely used to access the extension

  * class loader it came from which is otherwise not accessible to a plugin.

  * 

  * @goal lookup-wagon

  * @phase validate

  * 

  * @author Benjamin Bentmann

  * @version $Id: LookupWagonMojo.java 885587 2009-11-30 21:31:17Z bentmann $

  */

 public class LookupWagonMojo

     extends AbstractMojo

 {

     /**

      * The Wagon manager used to retrieve wagon providers.

      * 

      * @component

      */

     private WagonManager wagonManager;

     /**

      * The path to the properties file used to track the results of the wagon lookups.

      * 

      * @parameter expression="${wagon.outputFile}"

      */

     private File outputFile;

     /**

      * The URLs for which to look up wagons.

      * 

      * @parameter

      */

     private String[] urls;

     /**

      * Runs this mojo.

      * 

      * @throws MojoFailureException If the attached file has not been set.

      */

     public void execute()

         throws MojoExecutionException, MojoFailureException

     {

         Properties loaderProperties = new Properties();

         if ( urls != null )

         {

             for ( int i = 0; i < urls.length; i++ )

             {

                 String url = urls[i];

                 getLog().info( "[MAVEN-CORE-IT-LOG] Looking up wagon for URL " + url );

                 try

                 {

                     Repository repo = new Repository( "repo-" + i, url );

                     Wagon wagon = wagonManager.getWagon( repo );

                     getLog().info( "[MAVEN-CORE-IT-LOG]   " + wagon );

                     loaderProperties.setProperty( url + ".hash", Integer.toString( System.identityHashCode( wagon ) ) );

                     loaderProperties.setProperty( url + ".class", wagon.getClass().getName() );

                 }

                 catch ( Exception e )

                 {

                     getLog().warn( "[MAVEN-CORE-IT-LOG] Failed to lookp up wagon for URL " + url, e );

                 }

             }

         }

         getLog().info( "[MAVEN-CORE-IT-LOG] Creating output file " + outputFile );

         OutputStream out = null;

         try

         {

             outputFile.getParentFile().mkdirs();

             out = new FileOutputStream( outputFile );

             loaderProperties.store( out, "MAVEN-CORE-IT-LOG" );

         }

         catch ( IOException e )

         {

             throw new MojoExecutionException( "Output file could not be created: " + outputFile, e );

         }

         finally

         {

             if ( out != null )

             {

                 try

                 {

                     out.close();

                 }

                 catch ( IOException e )

                 {

                     // just ignore

                 }

             }

         }

         getLog().info( "[MAVEN-CORE-IT-LOG] Created output file " + outputFile );

     }

 }