package org.apache.maven.scm.command.changelog;

 /*

  * 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.CommandParameter;

 import org.apache.maven.scm.CommandParameters;

 import org.apache.maven.scm.ScmBranch;

 import org.apache.maven.scm.ScmException;

 import org.apache.maven.scm.ScmFileSet;

 import org.apache.maven.scm.ScmResult;

 import org.apache.maven.scm.ScmVersion;

 import org.apache.maven.scm.command.AbstractCommand;

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

 import java.util.Date;

 /**

  * @author <a href="mailto:trygvis@inamo.no">Trygve Laugst&oslash;l</a>

  * @author Olivier Lamy

  * @version $Id: AbstractChangeLogCommand.java 1328509 2012-04-20 21:13:09Z olamy $

  */

 public abstract class AbstractChangeLogCommand

     extends AbstractCommand

     implements ChangeLogCommand

 {

     protected abstract ChangeLogScmResult executeChangeLogCommand( ScmProviderRepository repository, ScmFileSet fileSet,

                                                                    Date startDate, Date endDate, ScmBranch branch,

                                                                    String datePattern )

         throws ScmException;

     protected ChangeLogScmResult executeChangeLogCommand( ScmProviderRepository repository, ScmFileSet fileSet,

                                                           ScmVersion startVersion, ScmVersion endVersion,

                                                           String datePattern )

         throws ScmException

     {

         throw new ScmException( "Unsupported method for this provider." );

     }

     /**

      * {@inheritDoc}

      */

     public ScmResult executeCommand( ScmProviderRepository repository, ScmFileSet fileSet,

                                      CommandParameters parameters )

         throws ScmException

     {

         Date startDate = parameters.getDate( CommandParameter.START_DATE, null );

         Date endDate = parameters.getDate( CommandParameter.END_DATE, null );

         int numDays = parameters.getInt( CommandParameter.NUM_DAYS, 0 );

         ScmBranch branch = (ScmBranch) parameters.getScmVersion( CommandParameter.BRANCH, null );

         ScmVersion startVersion = parameters.getScmVersion( CommandParameter.START_SCM_VERSION, null );

         ScmVersion endVersion = parameters.getScmVersion( CommandParameter.END_SCM_VERSION, null );

         String datePattern = parameters.getString( CommandParameter.CHANGELOG_DATE_PATTERN, null );

         if ( startVersion != null || endVersion != null )

         {

             return executeChangeLogCommand( repository, fileSet, startVersion, endVersion, datePattern );

         }

         else

         {

             if ( numDays != 0 && ( startDate != null || endDate != null ) )

             {

                 throw new ScmException( "Start or end date cannot be set if num days is set." );

             }

             if ( endDate != null && startDate == null )

             {

                 throw new ScmException( "The end date is set but the start date isn't." );

             }

             if ( numDays > 0 )

             {

                 int day = 24 * 60 * 60 * 1000;

                 startDate = new Date( System.currentTimeMillis() - (long) numDays * day );

                 endDate = new Date( System.currentTimeMillis() + (long) day );

             }

             else if ( endDate == null )

             {

                 endDate = new Date();

             }

             return executeChangeLogCommand( repository, fileSet, startDate, endDate, branch, datePattern );

         }

     }

 }