content: /*
   *  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
   *
   *      https://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.
   *
   */
  package org.apache.tools.ant.types.optional;
  
  import java.util.ArrayList;
  
  import org.apache.tools.ant.util.FileNameMapper;
  
  /**
   * Script support at map time.
   * @since Ant1.7
   */
  public class ScriptMapper extends AbstractScriptComponent implements FileNameMapper {
  
      private ArrayList<String> files;
  
  
      /**
       * Sets the from part of the transformation rule.
       *
       * @param from a string.
       */
      @Override
      public void setFrom(String from) {
      }
  
      /**
       * Sets the to part of the transformation rule.
       *
       * @param to a string.
       */
      @Override
      public void setTo(String to) {
      }
  
      /**
       * Reset the list of files
       */
      public void clear() {
          files = new ArrayList<>(1);
      }
  
      /**
       * Add a mapped name
       * @param mapping the value to use.
       */
      public void addMappedName(String mapping) {
          files.add(mapping);
      }
  
      /**
       * Returns an array containing the target filename(s) for the given source
       * file.
       *
       * <p>if the given rule doesn't apply to the source file, implementation
       * must return null. SourceFileScanner will then omit the source file in
       * question.</p>
       *
       * @param sourceFileName the name of the source file relative to some given
       *                       basedirectory.
       * @return an array of strings if the rule applies to the source file, or
       *         null if it does not.
       */
  
      @Override
      public String[] mapFileName(String sourceFileName) {
          initScriptRunner();
          getRunner().addBean("source", sourceFileName);
          clear();
          executeScript("ant_mapper");
          if (files.isEmpty()) {
              return null;
          }
          return files.toArray(new String[0]);
      }
  }
  