package org.apache.ojb.broker.accesslayer.sql;

 /* Copyright 2002-2005 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.

  */

 import org.apache.ojb.broker.metadata.ClassDescriptor;

 import org.apache.ojb.broker.metadata.FieldDescriptor;

 import org.apache.ojb.broker.platforms.Platform;

 import org.apache.ojb.broker.query.Criteria;

 import org.apache.ojb.broker.query.Query;

 import org.apache.ojb.broker.util.SqlHelper.PathInfo;

 import org.apache.ojb.broker.util.logging.Logger;

 /**

  * Model a DELETE by Query Statement

  *

  * @author Thomas Mahler

  * @version $Id: SqlDeleteByQuery.java,v 1.1 2007-08-24 22:17:39 ewestfal Exp $

  */

 public class SqlDeleteByQuery extends SqlQueryStatement

 {

         /**

          * Constructor for SqlDeleteByQuery.

          * @param cld

          */

         public SqlDeleteByQuery(Platform pf, ClassDescriptor cld, Query query, Logger logger)

         {

                 super(pf, cld, query, logger);

         }

     /**

      * @see org.apache.ojb.broker.accesslayer.sql.SqlQueryStatement#buildStatement()

      */

         protected String buildStatement()

         {

                 StringBuffer stmt = new StringBuffer();

                 StringBuffer where = new StringBuffer();

                 Criteria crit = this.getQuery().getCriteria();

                 stmt.append("DELETE FROM ");

                 stmt.append(getSearchClassDescriptor().getFullTableName());

                 appendWhereClause(where, crit, stmt);

                 return stmt.toString();

         }

         /* (non-Javadoc)

          * @see org.apache.ojb.broker.accesslayer.sql.SqlQueryStatement#getColName(org.apache.ojb.broker.accesslayer.sql.SqlQueryStatement.TableAlias, org.apache.ojb.broker.util.SqlHelper.PathInfo, boolean)

          */

         protected String getColName(TableAlias aTableAlias, PathInfo aPathInfo, boolean translate)

         {

         FieldDescriptor fld = null;

         String result;

         if (translate)

         {

             fld = getFieldDescriptor(aTableAlias, aPathInfo);

         }

         if (fld != null)

         {

             // BRJ : No alias for delete

             result = fld.getColumnName();

         }

         else

         {

             result = aPathInfo.column;

         }

        return result;

    }

 }