JBossQLQueryCommand.java example

Explorer
JBossAS51-master
/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2008, Red Hat Middleware LLC, and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.jboss.ejb.plugins.cmp.jdbc2;

import org.jboss.ejb.plugins.cmp.jdbc2.bridge.JDBCEntityBridge2;
import org.jboss.ejb.plugins.cmp.jdbc2.bridge.JDBCCMPFieldBridge2;
import org.jboss.ejb.plugins.cmp.jdbc.metadata.JDBCJBossQLQueryMetaData;
import org.jboss.ejb.plugins.cmp.jdbc.QLCompiler;
import org.jboss.ejb.plugins.cmp.jdbc.EJBQLToSQL92Compiler;
import org.jboss.logging.Logger;
import org.jboss.deployment.DeploymentException;

/**
 * @author <a href="mailto:alex@jboss.org">Alexey Loubyansky</a>
 * @version <tt>$Revision: 81030 $</tt>
 */
public class JBossQLQueryCommand
   extends AbstractQueryCommand
{
   public JBossQLQueryCommand(JDBCEntityBridge2 entity, JDBCJBossQLQueryMetaData metadata) throws DeploymentException
   {
      this.entity = entity;

      JDBCStoreManager2 manager = (JDBCStoreManager2)entity.getManager();
      QLCompiler compiler = new EJBQLToSQL92Compiler(manager.getCatalog());
      
      try
      {
         compiler.compileJBossQL(
            metadata.getJBossQL(),
            metadata.getMethod().getReturnType(),
            metadata.getMethod().getParameterTypes(),
            metadata);
      }
      catch(Throwable t)
      {
         t.printStackTrace();
         throw new DeploymentException("Error compiling JBossQL statement '" + metadata.getJBossQL() + "'", t);
      }

      sql = compiler.getSQL();

      setOffsetParam(compiler.getOffsetParam());
      setOffsetValue(compiler.getOffsetValue());
      setLimitParam(compiler.getLimitParam());
      setLimitValue(compiler.getLimitValue());

      log = Logger.getLogger(getClass().getName() + "." + entity.getEntityName() + "#" + metadata.getMethod().getName());
      log.debug("sql: " + sql);

      setParameters(compiler.getInputParameters());
      setResultType(metadata.getMethod().getReturnType());

      if(!compiler.isSelectEntity())
      {
         if(compiler.isSelectField())
         {
            setFieldReader((JDBCCMPFieldBridge2)compiler.getSelectField());
         }
         else
         {
            setFunctionReader(compiler.getSelectFunction());
         }
      }
      else
      {
         setEntityReader((JDBCEntityBridge2)compiler.getSelectEntity(), compiler.isSelectDistinct());
      }
   }
}