/*
 * 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.jdbc.bridge;


import java.lang.reflect.Field;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

import org.jboss.ejb.plugins.cmp.bridge.CMPFieldBridge;
import org.jboss.ejb.plugins.cmp.jdbc.LockingStrategy;
import org.jboss.ejb.EntityEnterpriseContext;

/**
 * JDBCCMPFieldBridge represents one CMP field. This implementations of 
 * this interface handles setting are responsible for setting statement
 * parameters and loading results for instance values and primary
 * keys.
 *
 * Life-cycle:
 *      Tied to the EntityBridge.
 *
 * Multiplicity:
 *      One for each entity bean cmp field.
 *
 * @author <a href="mailto:dain@daingroup.com">Dain Sundstrom</a>
 * @author <a href="mailto:loubyansky@hotmail.com">Alex Loubyansky</a>
 *
 * @version $Revision: 81030 $
 */
public interface JDBCCMPFieldBridge extends CMPFieldBridge
{
   /**
    * The index of the field among the table fields.
    */
   int getTableIndex();

   /**
    * Returns the default field flags.
    */
   byte getDefaultFlags();

   /**
    * TODO: Get rid of it
    * @param flag
    */
   void addDefaultFlag(byte flag);

   /**
    * @param ctx  instance's context
    * @return  field value that was locked.
    */
   Object getLockedValue(EntityEnterpriseContext ctx);

   /**
    * Optimistically locks field value.
    */
   public void lockInstanceValue(EntityEnterpriseContext ctx);

   /**
    * @param lockingStrategy locking strategy assigned to the field
    */
   void setLockingStrategy(LockingStrategy lockingStrategy);

   /**
    * Gets the field of the primary key object in which the value of this 
    * field is stored.
    */
   public Field getPrimaryKeyField();

   /**
    * Gets the value of this field in the specified primaryKey object.
    * @param primaryKey the primary key object from which this fields value 
    *    will be extracted
    * @return the value of this field in the primaryKey object
    */
   public Object getPrimaryKeyValue(Object primaryKey)
         throws IllegalArgumentException;

   /**
    * @return true if the field belongs to a relation table
    */
   boolean isRelationTableField();

   /**
    * Sets the value of this field to the specified value in the 
    * specified primaryKey object.
    * @param primaryKey the primary key object which the value 
    *    will be inserted
    * @param value the value for field that will be set in the pk
    * @return the updated primary key object; the actual object may 
    *    change not just the value
    */
    public Object setPrimaryKeyValue(Object primaryKey, Object value)
         throws IllegalArgumentException;
   
   /**
    * Sets the prepared statement parameters with the data from the 
    * primary key.
    */
   public int setPrimaryKeyParameters(PreparedStatement ps, int parameterIndex, Object primaryKey) throws IllegalArgumentException;
   
   /**
    * Sets the prepared statement parameters with the data from the 
    * object. The object must be the type of this field.
    */
   public int setArgumentParameters(PreparedStatement ps, int parameterIndex, Object arg);

   /**
    * Loads the data from result set into the primary key object.
    */
   public int loadPrimaryKeyResults(ResultSet rs, int parameterIndex, Object[] pkRef) throws IllegalArgumentException;
}                                         
