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Free Java Reporting Library
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2022 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.engine.fill;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRExpression;
/**
* Fill time expression evaluators interface.
*
* An instance of this interface is used at fill time by elements to
* evaluate expressions.
*
* @author Lucian Chirita ([email protected])
*/
public interface JRFillExpressionEvaluator
{
/**
* Evaluates an expression.
*
* @param expression the expression to evaluate
* @param evaluationType one of {@link JRExpression#EVALUATION_DEFAULT},
* {@link JRExpression#EVALUATION_OLD}, {@link JRExpression#EVALUATION_ESTIMATED}
* @return the result
* @throws JRException
*/
public Object evaluate(JRExpression expression, byte evaluationType) throws JRException;
/**
* Returns the dataset used by the expression evaluator.
*/
public JRFillDataset getFillDataset();
}