content: /*
   * Created on Jul 23, 2007
   *
   * Licensed 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.
   *
   * Copyright @2007-2009 the original author or authors.
   */
  package org.fest.swing.junit.ant;
  
  import static java.util.Arrays.asList;
  import static org.apache.tools.ant.Project.MSG_INFO;
  import static org.apache.tools.ant.ProjectHelper.configureProject;
  
  import java.io.*;
  import java.util.Vector;
  
  import org.apache.tools.ant.BuildLogger;
  import org.apache.tools.ant.Project;
  import org.apache.tools.ant.listener.TimestampedLogger;
  
  /**
   * Understands programmatic execution of a Ant task.
   *
   * @author Alex Ruiz
   */
  public final class AntLauncher {
  
    private final Project project = new Project();
    private final ByteArrayOutputStream out = new ByteArrayOutputStream();
  
    public AntLauncher(File buildFile) {
      project.addBuildListener(createLogger(out));
      project.init();
      configureProject(project, buildFile);
      project.setUserProperty("ant.file", buildFile.getAbsolutePath());
    }
  
    public String executeDefaultTarget() {
      return execute(project.getDefaultTarget());
    }
  
    public String execute(String... targetNames) {
      project.executeTargets(new Vector<String>(asList(targetNames)));
      return out.toString();
    }
  
    private static BuildLogger createLogger(ByteArrayOutputStream out) {
      BuildLogger logger = new TimestampedLogger();
      logger.setEmacsMode(false);
      logger.setErrorPrintStream(printStreamFrom(out));
      logger.setOutputPrintStream(printStreamFrom(out));
      logger.setMessageOutputLevel(MSG_INFO);
      return logger;
    }
  
    private static PrintStream printStreamFrom(ByteArrayOutputStream out) {
      return new PrintStream(out);
    }
  }
  