/*
    * Copyright 2001-2008 The Apache Software Foundation.
    * 
    * Licensed 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.
   *
   */
  
  package org.apache.juddi.query;
  
  import java.util.List;
  import javax.persistence.EntityManager;
  import javax.persistence.Query;
  
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.apache.juddi.query.util.DynamicQuery;
  
  /**
   * 
   * Returns the list of PublisherAssertions that contain the input businessKeys as their from or to key
   *  * 
   * @author <a href="mailto:jfaath@apache.org">Jeff Faath</a>
   */
  public class DeletePublisherAssertionByBusinessQuery extends PublisherAssertionQuery {
  
  	private static final Log log = LogFactory.getLog(DeletePublisherAssertionByBusinessQuery.class);
  
  	public static int delete(EntityManager em, List<?> businessKeys) {
  		if ((businessKeys == null) || (businessKeys.size() == 0))
  			return 0;
  		
  		DynamicQuery dynamicQry = new DynamicQuery(deleteSQL);
  		appendConditions(dynamicQry, businessKeys);
  		
  		log.debug(dynamicQry);
  		
  		Query qry = dynamicQry.buildJPAQuery(em);
  		int result = qry.executeUpdate();
  		
  		return result;
  	}
  	
  	/*
  	 * Appends the conditions to the query based on the businessKey list.  The keys can either be in the fromKey or toKey of the publisher assertion.
  	 */
  	public static void appendConditions(DynamicQuery qry, List<?> businessKeys) {
  		
  		qry.WHERE().pad().openParen().pad();
  		
  		qry.appendInList(ENTITY_ALIAS + "." + FROM_KEY_NAME, businessKeys);
  		qry.pad().OR().pad();
  		qry.appendInList(ENTITY_ALIAS + "." + TO_KEY_NAME, businessKeys);
  		qry.closeParen().pad();
  		
  		
  	}
  	
  	
  }