package org.apache.maven.scm.provider.cvslib.command.diff;

 /*

  * 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 org.apache.maven.scm.ScmException;

 import org.apache.maven.scm.ScmFileSet;

 import org.apache.maven.scm.ScmVersion;

 import org.apache.maven.scm.command.diff.AbstractDiffCommand;

 import org.apache.maven.scm.command.diff.DiffScmResult;

 import org.apache.maven.scm.provider.ScmProviderRepository;

 import org.apache.maven.scm.provider.cvslib.command.CvsCommand;

 import org.apache.maven.scm.provider.cvslib.command.CvsCommandUtils;

 import org.apache.maven.scm.provider.cvslib.repository.CvsScmProviderRepository;

 import org.codehaus.plexus.util.StringUtils;

 import org.codehaus.plexus.util.cli.Commandline;

 /**

  * @author <a href="mailto:brett@apache.org">Brett Porter</a>

  * @version $Id: AbstractCvsDiffCommand.java 691810 2008-09-03 22:38:28Z vsiveton $

  */

 public abstract class AbstractCvsDiffCommand

     extends AbstractDiffCommand

     implements CvsCommand

 {

     /** {@inheritDoc} */

     protected DiffScmResult executeDiffCommand( ScmProviderRepository repo, ScmFileSet fileSet,

                                                 ScmVersion startRevision, ScmVersion endRevision )

         throws ScmException

     {

         CvsScmProviderRepository repository = (CvsScmProviderRepository) repo;

         Commandline cl = CvsCommandUtils.getBaseCommand( "diff", repository, fileSet );

         cl.createArg().setValue( "-u" );

         if ( isSupportNewFileParameter() )

         {

             cl.createArg().setValue( "-N" );

         }

         if ( startRevision != null && StringUtils.isNotEmpty( startRevision.getName() ) )

         {

             cl.createArg().setValue( "-r" );

             cl.createArg().setValue( startRevision.getName() );

         }

         if ( endRevision != null && StringUtils.isNotEmpty( endRevision.getName() ) )

         {

             cl.createArg().setValue( "-r" );

             cl.createArg().setValue( endRevision.getName() );

         }

         if ( getLogger().isInfoEnabled() )

         {

             getLogger().info( "Executing: " + cl );

             getLogger().info( "Working directory: " + cl.getWorkingDirectory().getAbsolutePath() );

         }

         return executeCvsCommand( cl );

     }

     protected abstract DiffScmResult executeCvsCommand( Commandline cl )

         throws ScmException;

     protected boolean isSupportNewFileParameter()

     {

         return true;

     }

 }