package org.apache.continuum.dao;
   
   /*
    * 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.util.Collection;
  import java.util.Collections;
  import java.util.List;
  
  import javax.jdo.Extent;
  import javax.jdo.PersistenceManager;
  import javax.jdo.Query;
  import javax.jdo.Transaction;
  
  import org.apache.maven.continuum.model.project.BuildQueue;
  import org.apache.maven.continuum.store.ContinuumStoreException;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.stereotype.Repository;
  
  /**
   * 
   * @author <a href="mailto:oching@apache.org">Maria Odea Ching</a>
   * @plexus.component role="org.apache.continuum.dao.BuildQueueDao"
   */
  @Repository("buildQueueDao")
  public class BuildQueueDaoImpl
      extends AbstractDao
      implements BuildQueueDao
  {
      private static Logger log = LoggerFactory.getLogger( BuildQueueDaoImpl.class );
  
      public BuildQueue addBuildQueue( BuildQueue buildQueue )
          throws ContinuumStoreException
      {
          return (BuildQueue) addObject( buildQueue );
      }
  
      public List<BuildQueue> getAllBuildQueues()
          throws ContinuumStoreException
      {
          PersistenceManager pm = getPersistenceManager();
  
          Transaction tx = pm.currentTransaction();
  
          try
          {
              tx.begin();
  
              Extent extent = pm.getExtent( BuildQueue.class, true );
  
              Query query = pm.newQuery( extent );
  
              List result = (List) query.execute();
  
              return result == null ? Collections.EMPTY_LIST : (List<BuildQueue>) pm.detachCopyAll( result );
          }
          finally
          {
              tx.commit();
  
              rollback( tx );
          }
      }
  
      public BuildQueue getBuildQueue( int buildQueueId )
          throws ContinuumStoreException
      {
          return (BuildQueue) getObjectById( BuildQueue.class, buildQueueId );
      }
  
      public BuildQueue getBuildQueueByName( String name )
          throws ContinuumStoreException
      {
          PersistenceManager pm = getPersistenceManager();
  
          Transaction tx = pm.currentTransaction();
  
          try
          {
              tx.begin();
  
              Extent extent = pm.getExtent( BuildQueue.class, true );
 
             Query query = pm.newQuery( extent );
 
             query.declareImports( "import java.lang.String" );
 
             query.declareParameters( "String name" );
 
             query.setFilter( "this.name == name" );
 
             Collection result = (Collection) query.execute( name );
 
             if ( result.size() == 0 )
             {
                 tx.commit();
 
                 return null;
             }
 
             Object object = pm.detachCopy( result.iterator().next() );
 
             tx.commit();
 
             return (BuildQueue) object;
         }
         finally
         {
             rollback( tx );
         }
     }
     
     public void removeBuildQueue( BuildQueue buildQueue )
         throws ContinuumStoreException
     {
         removeObject( buildQueue );
     }
 
     public BuildQueue storeBuildQueue( BuildQueue buildQueue )
         throws ContinuumStoreException
     {
         updateObject( buildQueue );
 
         return buildQueue;
     }
 }