package org.apache.maven.shared.invoker;
   
   /*
    * 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 java.io.File;
  import java.io.InputStream;
  
  import org.codehaus.plexus.util.cli.CommandLineException;
  import org.codehaus.plexus.util.cli.CommandLineUtils;
  import org.codehaus.plexus.util.cli.Commandline;
  
  /**
   * Class intended to be used by clients who wish to invoke a forked Maven process from their applications
   * 
   * @author jdcasey
   * @plexus.component role="org.apache.maven.shared.invoker.Invoker" role-hint="default"
   */
  public class DefaultInvoker
      implements Invoker
  {
  
      public static final String ROLE_HINT = "default";
  
      private static final InvokerLogger DEFAULT_LOGGER = new SystemOutLogger();
  
      private static final InvocationOutputHandler DEFAULT_OUTPUT_HANDLER = new SystemOutHandler();
  
      private File localRepositoryDirectory;
  
      private InvokerLogger logger = DEFAULT_LOGGER;
  
      private File workingDirectory;
  
      private File mavenHome;
  
      private InvocationOutputHandler outputHandler = DEFAULT_OUTPUT_HANDLER;
  
      private InputStream inputStream;
  
      private InvocationOutputHandler errorHandler = DEFAULT_OUTPUT_HANDLER;
  
      public InvocationResult execute( InvocationRequest request )
          throws MavenInvocationException
      {
          MavenCommandLineBuilder cliBuilder = new MavenCommandLineBuilder();
  
          InvokerLogger logger = getLogger();
          if ( logger != null )
          {
              cliBuilder.setLogger( getLogger() );
          }
  
          File localRepo = getLocalRepositoryDirectory();
          if ( localRepo != null )
          {
              cliBuilder.setLocalRepositoryDirectory( getLocalRepositoryDirectory() );
          }
  
          File mavenHome = getMavenHome();
          if ( mavenHome != null )
          {
              cliBuilder.setMavenHome( getMavenHome() );
          }
  
          File workingDirectory = getWorkingDirectory();
          if ( workingDirectory != null )
          {
              cliBuilder.setWorkingDirectory( getWorkingDirectory() );
          }
  
          Commandline cli;
          try
          {
              cli = cliBuilder.build( request );
          }
          catch ( CommandLineConfigurationException e )
          {
              throw new MavenInvocationException( "Error configuring command-line. Reason: " + e.getMessage(), e );
          }
  
          DefaultInvocationResult result = new DefaultInvocationResult();
  
         try
         {
             int exitCode = executeCommandLine( cli, request );
 
             result.setExitCode( exitCode );
         }
         catch ( CommandLineException e )
         {
             result.setExecutionException( e );
         }
 
         return result;
     }
 
     private int executeCommandLine( Commandline cli, InvocationRequest request )
         throws CommandLineException
     {
         int result = Integer.MIN_VALUE;
 
         InputStream inputStream = request.getInputStream( this.inputStream );
         InvocationOutputHandler outputHandler = request.getOutputHandler( this.outputHandler );
         InvocationOutputHandler errorHandler = request.getErrorHandler( this.errorHandler );
 
         if ( getLogger().isDebugEnabled() )
         {
             getLogger().debug( "Executing: " + cli );
         }
         if ( request.isInteractive() )
         {
             if ( inputStream == null )
             {
                 getLogger().warn(
                                   "Maven will be executed in interactive mode"
                                       + ", but no input stream has been configured for this MavenInvoker instance." );
 
                 result = CommandLineUtils.executeCommandLine( cli, outputHandler, errorHandler );
             }
             else
             {
                 result = CommandLineUtils.executeCommandLine( cli, inputStream, outputHandler, errorHandler );
             }
         }
         else
         {
             if ( inputStream != null )
             {
                 getLogger().info( "Executing in batch mode. The configured input stream will be ignored." );
             }
 
             result = CommandLineUtils.executeCommandLine( cli, outputHandler, errorHandler );
         }
 
         return result;
     }
 
     public File getLocalRepositoryDirectory()
     {
         return localRepositoryDirectory;
     }
 
     public InvokerLogger getLogger()
     {
         return logger;
     }
 
     public Invoker setLocalRepositoryDirectory( File localRepositoryDirectory )
     {
         this.localRepositoryDirectory = localRepositoryDirectory;
         return this;
     }
 
     public Invoker setLogger( InvokerLogger logger )
     {
         this.logger = ( logger != null ) ? logger : DEFAULT_LOGGER;
         return this;
     }
 
     public File getWorkingDirectory()
     {
         return workingDirectory;
     }
 
     public Invoker setWorkingDirectory( File workingDirectory )
     {
         this.workingDirectory = workingDirectory;
         return this;
     }
 
     public File getMavenHome()
     {
         return mavenHome;
     }
 
     public Invoker setMavenHome( File mavenHome )
     {
         this.mavenHome = mavenHome;
 
         return this;
     }
 
     public Invoker setErrorHandler( InvocationOutputHandler errorHandler )
     {
         this.errorHandler = errorHandler;
         return this;
     }
 
     public Invoker setInputStream( InputStream inputStream )
     {
         this.inputStream = inputStream;
         return this;
     }
 
     public Invoker setOutputHandler( InvocationOutputHandler outputHandler )
     {
         this.outputHandler = outputHandler;
         return this;
     }
 
 }