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.compilers;
  
  import java.lang.reflect.Method;
  
  import org.apache.tools.ant.BuildException;
  import org.apache.tools.ant.Project;
  import org.apache.tools.ant.types.Commandline;
  
  
  /**
   * The implementation of the javac compiler for JDK 1.3
   * This is primarily a cut-and-paste from the original javac task before it
   * was refactored.
   *
   * @since Ant 1.3
   */
  public class Javac13 extends DefaultCompilerAdapter {
  
      /**
       * Integer returned by the "Modern" jdk1.3 compiler to indicate success.
       */
      private static final int MODERN_COMPILER_SUCCESS = 0;
  
      /**
       * Run the compilation.
       * @return true if the compiler ran with a zero exit result (ok)
       * @exception BuildException if the compilation has problems.
       */
      @Override
      public boolean execute() throws BuildException {
          attributes.log("Using modern compiler", Project.MSG_VERBOSE);
          Commandline cmd = setupModernJavacCommand();
  
          // Use reflection to be able to build on all JDKs >= 1.1:
          try {
              Class<?> c = Class.forName("com.sun.tools.javac.Main");
              Object compiler = c.getDeclaredConstructor().newInstance();
              Method compile = c.getMethod("compile", String[].class);
              int result = (Integer) compile.invoke(compiler,
                      (Object) cmd.getArguments());
              return result == MODERN_COMPILER_SUCCESS;
          } catch (Exception ex) {
              if (ex instanceof BuildException) {
                  throw (BuildException) ex;
              }
              throw new BuildException("Error starting modern compiler",
                                       ex, location);
          }
      }
  }
  