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/*
 * JasperReports - Free Java Reporting Library.
 * Copyright (C) 2001 - 2011 Jaspersoft Corporation. All rights reserved.
 * http://www.jaspersoft.com
 *
 * Unless you have purchased a commercial license agreement from Jaspersoft,
 * the following license terms apply:
 *
 * This program is part of JasperReports.
 *
 * JasperReports 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 3 of the License, or
 * (at your option) any later version.
 *
 * JasperReports 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 JasperReports. If not, see .
 */
package net.sf.jasperreports.engine.base;

import java.io.Serializable;

import net.sf.jasperreports.engine.JRConstants;
import net.sf.jasperreports.engine.JRExpression;
import net.sf.jasperreports.engine.JRGenericElementParameter;
import net.sf.jasperreports.engine.JRRuntimeException;
import net.sf.jasperreports.engine.design.JRDesignGenericElementParameter;
import net.sf.jasperreports.engine.util.JRCloneUtils;

/**
 * A read-only implementation of {@link JRGenericElementParameter}
 * that is included in compiled reports.
 * 
 * @author Lucian Chirita ([email protected])
 * @version $Id: JRBaseGenericElementParameter.java 4595 2011-09-08 15:55:10Z teodord $
 */
public class JRBaseGenericElementParameter implements JRGenericElementParameter, Serializable
{

	private static final long serialVersionUID = JRConstants.SERIAL_VERSION_UID;
	
	protected String name;
	protected JRExpression valueExpression;
	protected boolean skipWhenEmpty;

	protected JRBaseGenericElementParameter()
	{
	}
	
	/**
	 * Creates a generic element parameter by copying an existing instance.
	 * 
	 * @param parameter the parameter to copy
	 * @param factory the object factory to be used for creating sub objects
	 */
	public JRBaseGenericElementParameter(JRGenericElementParameter parameter,
			JRBaseObjectFactory factory)
	{
		this.name = parameter.getName();
		this.valueExpression = factory.getExpression(parameter.getValueExpression());
		this.skipWhenEmpty = parameter.isSkipWhenEmpty();
		
		factory.put(parameter, this);
	}
	
	public String getName()
	{
		return name;
	}

	public JRExpression getValueExpression()
	{
		return valueExpression;
	}

	public boolean isSkipWhenEmpty()
	{
		return skipWhenEmpty;
	}

	/**
	 * 
	 */
	public Object clone()
	{
		JRDesignGenericElementParameter clone = null;
		
		try
		{
			clone = (JRDesignGenericElementParameter)super.clone();
		}
		catch (CloneNotSupportedException e)
		{
			throw new JRRuntimeException(e);
		}
		
		clone.valueExpression = JRCloneUtils.nullSafeClone(valueExpression);
		
		return clone;
	}
	
}