package org.apache.maven.model.interpolation;
   
   /*
    * 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.model.path.PathTranslator;
  import org.codehaus.plexus.interpolation.InterpolationPostProcessor;
  import org.codehaus.plexus.interpolation.util.ValueSourceUtils;
  
  import java.io.File;
  import java.util.Collection;
  import java.util.List;
  
  /**
   *
   */
  class PathTranslatingPostProcessor
      implements InterpolationPostProcessor
  {
  
      private final Collection<String> unprefixedPathKeys;
      private final File projectDir;
      private final PathTranslator pathTranslator;
      private final List<String> expressionPrefixes;
  
      PathTranslatingPostProcessor( List<String> expressionPrefixes, Collection<String> unprefixedPathKeys,
                                           File projectDir, PathTranslator pathTranslator )
      {
          this.expressionPrefixes = expressionPrefixes;
          this.unprefixedPathKeys = unprefixedPathKeys;
          this.projectDir = projectDir;
          this.pathTranslator = pathTranslator;
      }
  
      @Override
      public Object execute( String expression, Object value )
      {
          if ( value != null )
          {
              expression = ValueSourceUtils.trimPrefix( expression, expressionPrefixes, true );
  
              if ( unprefixedPathKeys.contains( expression ) )
              {
                  return pathTranslator.alignToBaseDirectory( String.valueOf( value ), projectDir );
              }
          }
  
          return null;
      }
  
  }