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.taskdefs.optional.native2ascii;
  
  import org.apache.tools.ant.BuildException;
  import org.apache.tools.ant.ProjectComponent;
  import org.apache.tools.ant.taskdefs.ExecuteJava;
  import org.apache.tools.ant.taskdefs.optional.Native2Ascii;
  import org.apache.tools.ant.types.Commandline;
  
  /**
   * Adapter to kaffe.tools.native2ascii.Native2Ascii.
   *
   * @since Ant 1.6.3
   */
  public final class KaffeNative2Ascii extends DefaultNative2Ascii {
  
      // sorted by newest Kaffe version first
      private static final String[] N2A_CLASSNAMES = new String[] {
          "gnu.classpath.tools.native2ascii.Native2ASCII",
          // pre Kaffe 1.1.5
          "kaffe.tools.native2ascii.Native2Ascii",
      };
  
      /**
       * Identifies this adapter.
       */
      public static final String IMPLEMENTATION_NAME = "kaffe";
  
      /** {@inheritDoc} */
      @Override
      protected void setup(Commandline cmd, Native2Ascii args)
          throws BuildException {
          if (args.getReverse()) {
              throw new BuildException("-reverse is not supported by Kaffe");
          }
          super.setup(cmd, args);
      }
  
      /** {@inheritDoc} */
      @Override
      protected boolean run(Commandline cmd, ProjectComponent log)
          throws BuildException {
          ExecuteJava ej = new ExecuteJava();
          Class<?> c = getN2aClass();
          if (c == null) {
              throw new BuildException(
                  "Couldn't load Kaffe's Native2Ascii class");
          }
  
          cmd.setExecutable(c.getName());
          ej.setJavaCommand(cmd);
          ej.execute(log.getProject());
          // otherwise ExecuteJava has thrown an exception
          return true;
      }
  
      /**
       * tries to load Kaffe Native2Ascii and falls back to the older
       * class name if necessary.
       *
       * @return null if neither class can get loaded.
       */
      private static Class<?> getN2aClass() {
          for (String className : N2A_CLASSNAMES) {
              try {
                  return Class.forName(className);
              } catch (ClassNotFoundException cnfe) {
                  // Ignore
              }
          }
          return null;
      }
  
  }
  