/**
 *
 *  Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
 *
 *  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.tuscany.das.rdb.impl;

import java.util.Iterator;

import org.apache.tuscany.das.rdb.Parameter;
import org.apache.tuscany.das.rdb.util.DebugUtil;

import commonj.sdo.DataObject;

/**
 */
public abstract class ChangeOperation {

	private final WriteCommandImpl writeCommand;

	protected DatabaseObject dObject;

	private static final boolean debug = false;
	
	protected String propagatedID = null;
	
	private boolean isInsert = false;

	public ChangeOperation(DeleteCommandImpl command) {
		writeCommand = command;
	}

	public ChangeOperation(InsertCommandImpl command, DataObject changedObject) {
		writeCommand = command;
		dObject = new DatabaseObject(command.getMappingModel(), changedObject);
		this.isInsert = true;
	}
	
	public ChangeOperation(UpdateCommandImpl command, DataObject changedObject) {
		writeCommand = command;
		dObject = new DatabaseObject(command.getMappingModel(), changedObject);
	}

	public void execute() {
		DebugUtil.debugln(getClass(), debug, "Executing change operation");
	
		Iterator i = writeCommand.getParameters().iterator();
		while (i.hasNext()) {
			Parameter parm = (Parameter) i.next();
			DebugUtil.debugln(getClass(), debug, "setting " + parm.getName() + " to " + dObject.get(parm.getName()));
			parm.setValue(dObject.get(parm.getName()));
		}

		writeCommand.execute();
               
		if ( isInsert && ( propagatedID != null )) { 
			DebugUtil.debugln(getClass(), debug, "Propagating key " + propagatedID);
			int id = writeCommand.getGeneratedKey();
			dObject.setPropagatedID(propagatedID, id);
		}	
	}

	public String getTableName() {
		return dObject.getTableName();
	}


}