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Free Java Reporting Library

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/*
 * JasperReports - Free Java Reporting Library.
 * Copyright (C) 2001 - 2019 TIBCO Software Inc. 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.compilers;

import org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation;

/**
 * @author Lucian Chirita ([email protected])
 */
public class GroovyDirectExpressionValueFilter implements DirectExpressionValueFilter
{

	private static final GroovyDirectExpressionValueFilter INSTANCE = new GroovyDirectExpressionValueFilter();
	
	public static final GroovyDirectExpressionValueFilter instance()
	{
		return INSTANCE;
	}

	@Override
	public Object filterValue(Object value, Class expectedType)
	{
		Object filterValue;
		if (expectedType == null)
		{
			filterValue = value;
		}
		else
		{
			//Groovy expressions cast parameter/field/variable values to the declared type,
			//doing the same here
			filterValue = DefaultTypeTransformation.castToType(value, expectedType);
		}
		return filterValue;
	}
	
}