package org.apache.maven.scm.plugin;
   
   /*
    * 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.plugin.MojoExecutionException;
  import org.apache.maven.scm.ChangeSet;
  import org.apache.maven.scm.ScmBranch;
  import org.apache.maven.scm.ScmException;
  import org.apache.maven.scm.ScmVersion;
  import org.apache.maven.scm.command.changelog.ChangeLogScmResult;
  import org.apache.maven.scm.command.changelog.ChangeLogSet;
  import org.apache.maven.scm.provider.ScmProvider;
  import org.apache.maven.scm.repository.ScmRepository;
  import org.codehaus.plexus.util.StringUtils;
  
  import java.io.IOException;
  import java.text.ParseException;
  import java.text.SimpleDateFormat;
  import java.util.Date;
  
  /**
   * Dump changelog contents to console. It is mainly used to test maven-scm-api's changelog command.
   *
   * @author <a href="dantran@gmail.com">Dan Tran</a>
   * @author Olivier Lamy
   *
   * @goal changelog
   * @aggregator
   */
  public class ChangeLogMojo
      extends AbstractScmMojo
  {
      private static final String DEFAULT_DATE_FORMAT = "yyyy-MM-dd";
  
      /**
       * Start Date.
       *
       * @parameter expression="${startDate}"
       */
      private String startDate;
  
      /**
       * End Date.
       *
       * @parameter expression="${endDate}"
       */
      private String endDate;
  
      /**
       * Start Scm Version.
       *
       * @parameter expression="${startScmVersion}"
       */
      private String startScmVersion;
  
      /**
       * End Scm Version.
       *
       * @parameter expression="${endScmVersion}"
       */
      private String endScmVersion;
  
      /**
       * Start Scm Version Type.
       *
       * @parameter expression="${startScmVersionType}"
       */
      private String startScmVersionType;
  
      /**
       * End Scm Version Type.
       *
       * @parameter expression="${endScmVersionType}"
       */
      private String endScmVersionType;
  
      /**
       * Date Format in changelog output of scm tool.
       *
       * @parameter expression="${dateFormat}"
       */
      private String dateFormat;
 
     /**
      * Date format to use for the specified startDate and/or endDate.
      *
      * @parameter expression="${userDateFormat}" default-value="yyyy-MM-dd"
      */
     private String userDateFormat = DEFAULT_DATE_FORMAT;
 
     /**
      * The version type (branch/tag) of scmVersion.
      *
      * @parameter expression="${scmVersionType}"
      */
     private String scmVersionType;
 
     /**
      * The version (revision number/branch name/tag name).
      *
      * @parameter expression="${scmVersion}"
      */
     private String scmVersion;
 
     /**
      * {@inheritDoc}
      */
     public void execute()
         throws MojoExecutionException
     {
         super.execute();
 
         SimpleDateFormat localFormat = new SimpleDateFormat( userDateFormat );
 
         try
         {
             ScmRepository repository = getScmRepository();
 
             ScmProvider provider = getScmManager().getProviderByRepository( repository );
 
             ScmVersion startRev =
                 getScmVersion( StringUtils.isEmpty( startScmVersionType ) ? "revision" : startScmVersionType,
                                startScmVersion );
             ScmVersion endRev =
                 getScmVersion( StringUtils.isEmpty( endScmVersionType ) ? "revision" : endScmVersionType,
                                endScmVersion );
 
             ChangeLogScmResult result;
             if ( startRev != null || endRev != null )
             {
                 result = provider.changeLog( repository, getFileSet(), startRev, endRev, dateFormat );
             }
             else
             {
                 result = provider.changeLog( repository, getFileSet(), this.parseDate( localFormat, this.startDate ),
                                              this.parseDate( localFormat, this.endDate ), 0,
                                              (ScmBranch) getScmVersion( scmVersionType, scmVersion ), dateFormat );
             }
             checkResult( result );
 
             ChangeLogSet changeLogSet = result.getChangeLog();
 
             for ( ChangeSet changeSet : changeLogSet.getChangeSets() )
             {
                 getLog().info( changeSet.toString() );
             }
 
         }
         catch ( IOException e )
         {
             throw new MojoExecutionException( "Cannot run changelog command : ", e );
         }
         catch ( ScmException e )
         {
             throw new MojoExecutionException( "Cannot run changelog command : ", e );
         }
     }
 
     /**
      * Converts the localized date string pattern to date object.
      *
      * @return A date
      */
     private Date parseDate( SimpleDateFormat format, String date )
         throws MojoExecutionException
     {
         if ( date == null || date.trim().length() == 0 )
         {
             return null;
         }
 
         try
         {
             return format.parse( date.toString() );
         }
         catch ( ParseException e )
         {
             throw new MojoExecutionException( "Please use this date pattern: " + format.toLocalizedPattern().toString(),
                                               e );
         }
     }
 }