net.sf.jasperreports.compilers.JavaDirectExpressionValueFilter Maven / Gradle / Ivy

/*
 * 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;

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

	private static final JavaDirectExpressionValueFilter INSTANCE = new JavaDirectExpressionValueFilter();
	
	public static final JavaDirectExpressionValueFilter instance()
	{
		return INSTANCE;
	}
	
	@Override
	public Object filterValue(Object value, Class expectedType)
	{
		Object filteredValue;
		if (expectedType != null && value != null)
		{
			//parameter/field/variable values are cast to the declared type in Java compiled expressions
			//performing the same check here to preserve the behavior
			filteredValue = expectedType.cast(value);
		}
		else
		{
			filteredValue = value;
		}
		return filteredValue;
	}
	
}