net.sf.jasperreports.components.table.fill.BuiltinExpressionEvaluatorFactory Maven / Gradle / Ivy
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2016 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.
*
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* along with JasperReports. If not, see .
*/
package net.sf.jasperreports.components.table.fill;
import java.util.HashMap;
import java.util.Map;
import net.sf.jasperreports.engine.JRExpression;
import net.sf.jasperreports.engine.design.JRDesignExpression;
import net.sf.jasperreports.engine.fill.DatasetExpressionEvaluator;
import net.sf.jasperreports.engine.fill.JRFillExpressionEvaluator;
/**
* @author Lucian Chirita ([email protected])
*/
public class BuiltinExpressionEvaluatorFactory
{
private final Map builtinEvaluators;
public BuiltinExpressionEvaluatorFactory()
{
builtinEvaluators = new HashMap();
}
public JRDesignExpression createExpression(BuiltinExpressionEvaluator evaluator)
{
// we only need an empty expression object here
// the evaluation logic is separate
JRDesignExpression expression = new JRDesignExpression();
builtinEvaluators.put(expression, evaluator);
return expression;
}
public JRDesignExpression createConstantExpression(Object value)
{
ConstantBuiltinExpression evaluator = new ConstantBuiltinExpression(value);
return createExpression(evaluator);
}
public DatasetExpressionEvaluator decorate(DatasetExpressionEvaluator evaluator)
{
if (builtinEvaluators.isEmpty())
{
return evaluator;
}
// use the builtin expression evaluators
return new BuiltinExpressionEvaluatorDecorator(evaluator, builtinEvaluators);
}
public JRFillExpressionEvaluator decorate(JRFillExpressionEvaluator evaluator)
{
// always use the builtin expression evaluators, bultin expression can be added after decoration
return new BuiltinFillExpressionEvaluatorDecorator(evaluator, builtinEvaluators);
}
}