package org.apache.maven.scm.command;

 /*

  * 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.CommandParameters;

 import org.apache.maven.scm.ScmException;

 import org.apache.maven.scm.ScmFileSet;

 import org.apache.maven.scm.ScmResult;

 import org.apache.maven.scm.log.ScmLogger;

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

 /**

  * @author <a href="mailto:evenisse@apache.org">Emmanuel Venisse</a>

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

  * @version $Id: AbstractCommand.java 685539 2008-08-13 13:27:27Z vsiveton $

  */

 public abstract class AbstractCommand

     implements Command

 {

     private ScmLogger logger;

     protected abstract ScmResult executeCommand( ScmProviderRepository repository, ScmFileSet fileSet,

                                                  CommandParameters parameters )

         throws ScmException;

     /** {@inheritDoc} */

     public final ScmResult execute( ScmProviderRepository repository, ScmFileSet fileSet, CommandParameters parameters )

         throws ScmException

     {

         if ( repository == null )

         {

             throw new NullPointerException( "repository cannot be null" );

         }

         if ( fileSet == null )

         {

             throw new NullPointerException( "fileSet cannot be null" );

         }

         try

         {

             return executeCommand( repository, fileSet, parameters );

         }

         catch ( Exception ex )

         {

             throw new ScmException( "Exception while executing SCM command.", ex );

         }

     }

     /** {@inheritDoc} */

     public final ScmLogger getLogger()

     {

         return logger;

     }

     /** {@inheritDoc} */

     public final void setLogger( ScmLogger logger )

     {

         this.logger = logger;

     }

 }