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;

     }

 }