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 java.util.Collection;

 import java.util.HashSet;

 import java.util.Iterator;

 import org.apache.maven.artifact.Artifact;

 /**

  * @author Benjamin Bentmann

  */

 class ArtifactSelector

 {

     private Collection includes;

     private Collection excludes;

     public ArtifactSelector( ArtifactSet artifactSet, String groupPrefix )

     {

         this( ( artifactSet != null ) ? artifactSet.getIncludes() : null,

               ( artifactSet != null ) ? artifactSet.getExcludes() : null, groupPrefix );

     }

     public ArtifactSelector( Collection includes, Collection 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 toIds( Collection patterns )

     {

         Collection result = new HashSet();

         if ( patterns != null )

         {

             for ( Iterator it = patterns.iterator(); it.hasNext(); )

             {

                 String pattern = (String) it.next();

                 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 patterns, ArtifactId id )

     {

         for ( Iterator it = patterns.iterator(); it.hasNext(); )

         {

             ArtifactId pattern = (ArtifactId) it.next();

             if ( id.matches( pattern ) )

             {

                 return true;

             }

         }

         return false;

     }

 }