package org.apache.maven.plugin.descriptor;
   
   /*
    * 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.io.File;
  import java.io.FileInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.Reader;
  import java.net.MalformedURLException;
  import java.net.URL;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  
  import org.apache.maven.artifact.Artifact;
  import org.apache.maven.artifact.ArtifactUtils;
  import org.apache.maven.model.Plugin;
  import org.apache.maven.plugin.lifecycle.Lifecycle;
  import org.apache.maven.plugin.lifecycle.LifecycleConfiguration;
  import org.apache.maven.plugin.lifecycle.io.xpp3.LifecycleMappingsXpp3Reader;
  import org.codehaus.plexus.classworlds.realm.ClassRealm;
  import org.codehaus.plexus.component.repository.ComponentSetDescriptor;
  import org.codehaus.plexus.util.IOUtil;
  import org.codehaus.plexus.util.ReaderFactory;
  import org.codehaus.plexus.util.xml.pull.XmlPullParserException;
  
  /**
   * @author Jason van Zyl
   */
  public class PluginDescriptor
      extends ComponentSetDescriptor
      implements Cloneable
  {
  
      private static final String LIFECYCLE_DESCRIPTOR = "META-INF/maven/lifecycle.xml";
  
      private String groupId;
  
      private String artifactId;
  
      private String version;
  
      private String goalPrefix;
  
      private String source;
  
      private boolean inheritedByDefault = true;
  
      private List<Artifact> artifacts;
  
      private ClassRealm classRealm;
  
      // calculated on-demand.
      private Map<String, Artifact> artifactMap;
  
      private Set<Artifact> introducedDependencyArtifacts;
  
      private String name;
  
      private String description;
  
      private String requiredMavenVersion;
  
      private Plugin plugin;
  
      private Artifact pluginArtifact;
  
      private Map<String, Lifecycle> lifecycleMappings;
  
      // ----------------------------------------------------------------------
      //
      // ----------------------------------------------------------------------
  
      @SuppressWarnings( { "unchecked", "rawtypes" } )
      public List<MojoDescriptor> getMojos()
      {
          return (List) getComponents();
      }
  
     public void addMojo( MojoDescriptor mojoDescriptor )
         throws DuplicateMojoDescriptorException
     {
         MojoDescriptor existing = null;
         // this relies heavily on the equals() and hashCode() for ComponentDescriptor,
         // which uses role:roleHint for identity...and roleHint == goalPrefix:goal.
         // role does not vary for Mojos.
         List<MojoDescriptor> mojos = getMojos();
 
         if ( mojos != null && mojos.contains( mojoDescriptor ) )
         {
             int indexOf = mojos.indexOf( mojoDescriptor );
 
             existing = mojos.get( indexOf );
         }
 
         if ( existing != null )
         {
             throw new DuplicateMojoDescriptorException( getGoalPrefix(), mojoDescriptor.getGoal(), existing
                 .getImplementation(), mojoDescriptor.getImplementation() );
         }
         else
         {
             addComponentDescriptor( mojoDescriptor );
         }
     }
 
     public String getGroupId()
     {
         return groupId;
     }
 
     public void setGroupId( String groupId )
     {
         this.groupId = groupId;
     }
 
     public String getArtifactId()
     {
         return artifactId;
     }
 
     public void setArtifactId( String artifactId )
     {
         this.artifactId = artifactId;
     }
 
     // ----------------------------------------------------------------------
     // Dependencies
     // ----------------------------------------------------------------------
 
     public static String constructPluginKey( String groupId, String artifactId, String version )
     {
         return groupId + ":" + artifactId + ":" + version;
     }
 
     public String getPluginLookupKey()
     {
         return groupId + ":" + artifactId;
     }
 
     public String getId()
     {
         return constructPluginKey( groupId, artifactId, version );
     }
 
     public static String getDefaultPluginArtifactId( String id )
     {
         return "maven-" + id + "-plugin";
     }
 
     public static String getDefaultPluginGroupId()
     {
         return "org.apache.maven.plugins";
     }
 
     /**
      * Parse maven-...-plugin.
      *
      * @todo move to plugin-tools-api as a default only
      */
     public static String getGoalPrefixFromArtifactId( String artifactId )
     {
         if ( "maven-plugin-plugin".equals( artifactId ) )
         {
             return "plugin";
         }
         else
         {
             return artifactId.replaceAll( "-?maven-?", "" ).replaceAll( "-?plugin-?", "" );
         }
     }
 
     public String getGoalPrefix()
     {
         return goalPrefix;
     }
 
     public void setGoalPrefix( String goalPrefix )
     {
         this.goalPrefix = goalPrefix;
     }
 
     public void setVersion( String version )
     {
         this.version = version;
     }
 
     public String getVersion()
     {
         return version;
     }
 
     public void setSource( String source )
     {
         this.source = source;
     }
 
     public String getSource()
     {
         return source;
     }
 
     public boolean isInheritedByDefault()
     {
         return inheritedByDefault;
     }
 
     public void setInheritedByDefault( boolean inheritedByDefault )
     {
         this.inheritedByDefault = inheritedByDefault;
     }
 
     /**
      * Gets the artifacts that make up the plugin's class realm, excluding artifacts shadowed by the Maven core realm
      * like {@code maven-project}.
      *
      * @return The plugin artifacts, never {@code null}.
      */
     public List<Artifact> getArtifacts()
     {
         return artifacts;
     }
 
     public void setArtifacts( List<Artifact> artifacts )
     {
         this.artifacts = artifacts;
 
         // clear the calculated artifactMap
         artifactMap = null;
     }
 
     /**
      * The map of artifacts accessible by the versionlessKey, i.e. groupId:artifactId
      * 
      * @return a Map of artifacts, never {@code null}
      * @see #getArtifacts()
      */
     public Map<String, Artifact> getArtifactMap()
     {
         if ( artifactMap == null )
         {
             artifactMap = ArtifactUtils.artifactMapByVersionlessId( getArtifacts() );
         }
 
         return artifactMap;
     }
 
     public boolean equals( Object object )
     {
         if ( this == object )
         {
             return true;
         }
 
         return object instanceof PluginDescriptor &&  getId().equals( ( (PluginDescriptor) object ).getId() );
     }
 
     public int hashCode()
     {
         return 10 + getId().hashCode();
     }
 
     public MojoDescriptor getMojo( String goal )
     {
         if ( getMojos() == null )
         {
             return null; // no mojo in this POM
         }
 
         // TODO: could we use a map? Maybe if the parent did that for components too, as this is too vulnerable to
         // changes above not being propagated to the map
         for ( MojoDescriptor desc : getMojos() )
         {
             if ( goal.equals( desc.getGoal() ) )
             {
                 return desc;
             }
         }
         return null;
     }
 
     public void setClassRealm( ClassRealm classRealm )
     {
         this.classRealm = classRealm;
     }
 
     public ClassRealm getClassRealm()
     {
         return classRealm;
     }
 
     public void setIntroducedDependencyArtifacts( Set<Artifact> introducedDependencyArtifacts )
     {
         this.introducedDependencyArtifacts = introducedDependencyArtifacts;
     }
 
     public Set<Artifact> getIntroducedDependencyArtifacts()
     {
         return ( introducedDependencyArtifacts != null ) ? introducedDependencyArtifacts
                         : Collections.<Artifact> emptySet();
     }
 
     public void setName( String name )
     {
         this.name = name;
     }
 
     public String getName()
     {
         return name;
     }
 
     public void setDescription( String description )
     {
         this.description = description;
     }
 
     public String getDescription()
     {
         return description;
     }
 
     public void setRequiredMavenVersion( String requiredMavenVersion )
     {
         this.requiredMavenVersion = requiredMavenVersion;
     }
 
     public String getRequiredMavenVersion()
     {
         return requiredMavenVersion;
     }
 
     public void setPlugin( Plugin plugin )
     {
         this.plugin = plugin;
     }
 
     public Plugin getPlugin()
     {
         return plugin;
     }
 
     public Artifact getPluginArtifact()
     {
         return pluginArtifact;
     }
 
     public void setPluginArtifact( Artifact pluginArtifact )
     {
         this.pluginArtifact = pluginArtifact;
     }
 
     public Lifecycle getLifecycleMapping( String lifecycleId )
         throws IOException, XmlPullParserException
     {
         if ( lifecycleMappings == null )
         {
             LifecycleConfiguration lifecycleConfiguration;
 
             Reader reader = null;
             try
             {
                 reader = ReaderFactory.newXmlReader( getDescriptorStream( LIFECYCLE_DESCRIPTOR ) );
 
                 lifecycleConfiguration = new LifecycleMappingsXpp3Reader().read( reader );
             }
             finally
             {
                 IOUtil.close( reader );
             }
 
             lifecycleMappings = new HashMap<String, Lifecycle>();
 
             for ( Lifecycle lifecycle : lifecycleConfiguration.getLifecycles() )
             {
                 lifecycleMappings.put( lifecycle.getId(), lifecycle );
             }
         }
 
         return lifecycleMappings.get( lifecycleId );
     }
 
     private InputStream getDescriptorStream( String descriptor )
         throws IOException
     {
         File pluginFile = ( pluginArtifact != null ) ? pluginArtifact.getFile() : null;
         if ( pluginFile == null )
         {
             throw new IllegalStateException( "plugin main artifact has not been resolved for " + getId() );
         }
 
         if ( pluginFile.isFile() )
         {
             try
             {
                 return new URL( "jar:" + pluginFile.toURI() + "!/" + descriptor ).openStream();
             }
             catch ( MalformedURLException e )
             {
                 throw new IllegalStateException( e );
             }
         }
         else
         {
             return new FileInputStream( new File( pluginFile, descriptor ) );
         }
     }
 
     /**
      * Creates a shallow copy of this plugin descriptor.
      */
     @Override
     public PluginDescriptor clone()
     {
         try
         {
             return (PluginDescriptor) super.clone();
         }
         catch ( CloneNotSupportedException e )
         {
             throw new UnsupportedOperationException( e );
         }
     }
 
 }