package org.apache.maven.plugins.enforcer;
   
   /*
    * 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.HashSet;
  import java.util.List;
  import java.util.Set;
  
  import org.apache.maven.artifact.Artifact;
  import org.apache.maven.artifact.resolver.filter.AndArtifactFilter;
  import org.apache.maven.enforcer.rule.api.EnforcerRuleException;
  import org.apache.maven.enforcer.rule.api.EnforcerRuleHelper;
  import org.apache.maven.plugin.logging.Log;
  import org.apache.maven.project.MavenProject;
  import org.apache.maven.shared.artifact.filter.StrictPatternExcludesArtifactFilter;
  import org.apache.maven.shared.artifact.filter.StrictPatternIncludesArtifactFilter;
  import org.codehaus.plexus.component.configurator.expression.ExpressionEvaluationException;
  
  /**
   * This rule checks that no snapshots are included.
   *
   * @author <a href="mailto:brianf@apache.org">Brian Fox</a>
   * @version $Id$
   */
  public class RequireReleaseDeps
      extends AbstractBanDependencies
  {
  
      /**
       * Allows this rule to execute only when this project is a release.
       *
       * @parameter
       * 
       * @see {@link #setOnlyWhenRelease(boolean)}
       * @see {@link #isOnlyWhenRelease()}
  
       */
      private boolean onlyWhenRelease = false;
  
      /**
       * Allows this rule to fail when the parent is defined as a snapshot.
       *
       * @parameter
       * 
       * @see {@link #setFailWhenParentIsSnapshot(boolean)}
       * @see {@link #isFailWhenParentIsSnapshot()}
       */
      private boolean failWhenParentIsSnapshot = true;
  
      /**
       * Dependencies to ignore when checking for release versions.  For example, inter-module dependencies 
       * can be excluded from the check and therefore allowed to contain snapshot versions.
       * 
       * @see {@link #setExcludes(List)}
       * @see {@link #getExcludes()}
       */
      private List<String> excludes = null;
  
      /**
       * Dependencies to include when checking for release versions.  If any of the included dependencies
       * have snapshot versions, the rule will fail.
       * 
       * @see {@link #setIncludes(List)}
       * @see {@link #getIncludes()}
       */
      private List<String> includes = null;
  
      // Override parent to allow optional ignore of this rule.
      @Override
      public void execute( EnforcerRuleHelper helper )
          throws EnforcerRuleException
      {
          boolean callSuper;
          MavenProject project = null;
          if ( onlyWhenRelease )
          {
              // get the project
              project = getProject( helper );
  
              // only call super if this project is a release
              callSuper = !project.getArtifact().isSnapshot();
          }
         else
         {
             callSuper = true;
         }
         if ( callSuper )
         {
             super.execute( helper );
             if ( failWhenParentIsSnapshot )
             {
                 if ( project == null )
                 {
                     project = getProject( helper );
                 }
                 Artifact parentArtifact = project.getParentArtifact();
                 if ( parentArtifact != null && parentArtifact.isSnapshot() )
                 {
                     throw new EnforcerRuleException( "Parent Cannot be a snapshot: " + parentArtifact.getId() );
                 }
             }
         }
     }
 
     /**
      * @param helper
      * @return The evaluated {@link MavenProject}.
      * @throws EnforcerRuleException
      */
     private MavenProject getProject( EnforcerRuleHelper helper )
         throws EnforcerRuleException
     {
         try
         {
             return (MavenProject) helper.evaluate( "${project}" );
         }
         catch ( ExpressionEvaluationException eee )
         {
             throw new EnforcerRuleException( "Unable to retrieve the MavenProject: ", eee );
         }
     }
 
     @Override
     protected Set<Artifact> checkDependencies( Set<Artifact> dependencies, Log log )
         throws EnforcerRuleException
     {
         Set<Artifact> foundSnapshots = new HashSet<Artifact>();
 
         Set<Artifact> filteredDependencies = filterArtifacts( dependencies );
         
         for ( Artifact artifact : filteredDependencies )
         {
             if ( artifact.isSnapshot() )
             {
                 foundSnapshots.add( artifact );
             }
         }
 
         return foundSnapshots;
     }
     
     /*
      * Filter the dependency artifacts according to the includes and excludes
      * If includes and excludes are both null, the original set is returned.
      * 
      * @param dependencies the list of dependencies to filter
      * @return the resulting set of dependencies
      */
     public Set<Artifact> filterArtifacts( Set<Artifact> dependencies )
     {
         if ( includes == null && excludes == null )
         {
             return dependencies;
         }
         
         AndArtifactFilter filter = new AndArtifactFilter( );
         if ( includes != null )
         {
             filter.add( new StrictPatternIncludesArtifactFilter( includes ) );
         }
         if ( excludes != null )
         {
             filter.add( new StrictPatternExcludesArtifactFilter( excludes ) );
         }
         
         Set<Artifact> result = new HashSet<Artifact>();
         for ( Artifact artifact : dependencies )
         {
             if ( filter.include( artifact ) )
             {
                 result.add( artifact );
             }
         }
         return result;
     }
 
     public final boolean isOnlyWhenRelease()
     {
         return onlyWhenRelease;
     }
 
     public final void setOnlyWhenRelease( boolean onlyWhenRelease )
     {
         this.onlyWhenRelease = onlyWhenRelease;
     }
 
     public final boolean isFailWhenParentIsSnapshot()
     {
         return failWhenParentIsSnapshot;
     }
 
     public final void setFailWhenParentIsSnapshot( boolean failWhenParentIsSnapshot )
     {
         this.failWhenParentIsSnapshot = failWhenParentIsSnapshot;
     }
     
     public final void setExcludes( List<String> excludes )
     {
         this.excludes = excludes;
     }
     
     public final List<String> getExcludes()
     {
         return excludes;
     }
     
     public void setIncludes( List<String> includes )
     {
         this.includes = includes;
     }
     
     public List<String> getIncludes()
     {
         return includes;
     }
 }