package org.apache.maven.plugins.shade.mojo;
   
   /*
    * 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.Artifact;
  
  import java.util.Collection;
  import java.util.HashSet;
  
  /**
   * @author Benjamin Bentmann
   */
  class ArtifactSelector
  {
  
      private Collection<ArtifactId> includes;
  
      private Collection<ArtifactId> excludes;
  
      public ArtifactSelector( Artifact projectArtifact, ArtifactSet artifactSet, String groupPrefix )
      {
          this( ( artifactSet != null ) ? artifactSet.getIncludes() : null,
                ( artifactSet != null ) ? artifactSet.getExcludes() : null, groupPrefix );
  
          if ( projectArtifact != null && !this.includes.isEmpty() )
          {
              this.includes.add( new ArtifactId( projectArtifact ) );
          }
      }
  
      public ArtifactSelector( Collection<String> includes, Collection<String> excludes, String groupPrefix )
      {
          this.includes = toIds( includes );
          this.excludes = toIds( excludes );
  
          if ( groupPrefix != null && groupPrefix.length() > 0 )
          {
              this.includes.add( new ArtifactId( groupPrefix + "*", "*", "*", "*" ) );
          }
      }
  
      private static Collection<ArtifactId> toIds( Collection<String> patterns )
      {
          Collection<ArtifactId> result = new HashSet<ArtifactId>();
  
          if ( patterns != null )
          {
              for ( String pattern : patterns )
              {
                  result.add( new ArtifactId( pattern ) );
              }
          }
  
          return result;
      }
  
      public boolean isSelected( Artifact artifact )
      {
          return ( artifact != null ) ? isSelected( new ArtifactId( artifact ) ) : false;
      }
  
      boolean isSelected( ArtifactId id )
      {
          return ( includes.isEmpty() || matches( includes, id ) ) && !matches( excludes, id );
      }
  
      private boolean matches( Collection<ArtifactId> patterns, ArtifactId id )
      {
          for ( ArtifactId pattern : patterns )
          {
              if ( id.matches( pattern ) )
              {
                  return true;
              }
          }
          return false;
      }
  
  }