/*
 * Lokomo OneCMDB - An Open Source Software for Configuration
 * Management of Datacenter Resources
 *
 * Copyright (C) 2006 Lokomo Systems AB
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 *
 * This program 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
 * General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 * 
 * Lokomo Systems AB can be contacted via e-mail: info@lokomo.com or via
 * paper mail: Lokomo Systems AB, Sv�rdv�gen 27, SE-182 33
 * Danderyd, Sweden.
 *
 */
package org.onecmdb.core.utils.transform;

import java.io.IOException;


public class ComplexAttributeSelector extends AAttributeSelector implements IAttributeSelector {

	private DataSet dataSet;

	public ComplexAttributeSelector() {
	}
	
	public ComplexAttributeSelector(String name, DataSet dataSet) {
		setName(name);
		setDataSet(dataSet);
	}
	
	public ComplexAttributeSelector(String name, DataSet dataSet, boolean naturalKey) {
		setName(name);
		setDataSet(dataSet);
		setNaturalKey(naturalKey);
	}

	public IAttributeValue getAttribute(IInstance row) throws IOException {
		DataSet instance;
		IInstance clonedRow;
		try {
			instance = dataSet.clone();
			clonedRow = row.clone();
		} catch (CloneNotSupportedException e) {
			throw new IOException("Internal Error: DataSet not cloneable!");
		}
		clonedRow.setDataSet(getDataSet());
		instance.setDataSource(clonedRow);
		
		return(new DataSetAttributeValue(this, instance));
	}

	public void setDataSet(DataSet dataSet) {
		this.dataSet = dataSet;
	}
	
	public DataSet getDataSet() {
		return(this.dataSet);
	}

	@Override
	public String toString() {
		return("ComplexAttributeSelector name=" + getName() + ", key=" + isNaturalKey() + ", dataSet=" + getDataSet());
	}

	
}