net.sf.jasperreports.engine.util.JRExpressionUtil Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jasperreports Show documentation
Show all versions of jasperreports Show documentation
Free Java Reporting Library
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2023 Cloud Software Group, 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 .
*/
/*
* Contributors:
* Eugene D - [email protected]
* Adrian Jackson - [email protected]
* David Taylor - [email protected]
* Lars Kristensen - [email protected]
*/
package net.sf.jasperreports.engine.util;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import net.sf.jasperreports.engine.JRExpression;
import net.sf.jasperreports.engine.JRExpressionChunk;
import net.sf.jasperreports.engine.JRRuntimeException;
import net.sf.jasperreports.engine.design.JRDesignExpression;
import net.sf.jasperreports.engine.design.JRDesignExpressionChunk;
/**
* @author Teodor Danciu ([email protected])
*/
public final class JRExpressionUtil
{
public static final String EXCEPTION_MESSAGE_KEY_UNKNOWN_EXPRESSION_CHUNK_TYPE = "util.expression.unknown.expression.chunk.type";
/**
*
*/
public static String getExpressionText(JRExpression exp)
{
return exp == null ? null : exp.getText();
}
private static final Pattern SIMPLE_EXPRESSION_PATTERN =
Pattern.compile("\\s*\"([^\"]*((?<=\\\\)\"[^\"]*)*)\"\\s*");
private static final int SIMPLE_EXPRESSION_TEXT_GROUP = 1;
private static final Pattern TEXT_QUOTE_PATTERN = Pattern.compile("\\\\\"");
private static final String TEXT_QUOTE_REPLACEMENT = "\"";
/**
*
*/
public static String getSimpleExpressionText(JRExpression expression)
{
String value = null;
if (expression != null)
{
JRExpressionChunk[] chunks = expression.getChunks();
if (
chunks != null
&& chunks.length == 1
&& chunks[0].getType() == JRExpressionChunk.TYPE_TEXT
)
{
String chunk = chunks[0].getText();
Matcher matcher = SIMPLE_EXPRESSION_PATTERN.matcher(chunk);
if (matcher.matches())
{
String text = matcher.group(SIMPLE_EXPRESSION_TEXT_GROUP);
value = TEXT_QUOTE_PATTERN.matcher(text).replaceAll(
TEXT_QUOTE_REPLACEMENT);
}
}
}
return value;
}
public static void visitChunks(JRExpression expression, ExpressionChunkVisitor visitor)
{
JRExpressionChunk[] chunks = expression.getChunks();
if (chunks != null)
{
for (JRExpressionChunk chunk : chunks)
{
switch (chunk.getType())
{
case JRExpressionChunk.TYPE_TEXT:
visitor.visitTextChunk(chunk);
break;
case JRExpressionChunk.TYPE_PARAMETER:
visitor.visitParameterChunk(chunk);
break;
case JRExpressionChunk.TYPE_FIELD:
visitor.visitFieldChunk(chunk);
break;
case JRExpressionChunk.TYPE_VARIABLE:
visitor.visitVariableChunk(chunk);
break;
case JRExpressionChunk.TYPE_RESOURCE:
visitor.visitResourceChunk(chunk);
break;
default:
throw
new JRRuntimeException(
EXCEPTION_MESSAGE_KEY_UNKNOWN_EXPRESSION_CHUNK_TYPE,
new Object[]{chunk.getType()});
}
}
}
}
/**
*
*/
public static String convertSimpleTextExpression(JRExpression expression)
{
JRDesignExpression convertedExpression = null;
if (expression != null)
{
convertedExpression = new JRDesignExpression();
JRExpressionChunk[] chunks = expression.getChunks();
if (chunks != null)
{
for (int i = 0; i < chunks.length; i++)
{
JRExpressionChunk chunk = chunks[i];
JRDesignExpressionChunk convertedChunk = new JRDesignExpressionChunk();
convertedChunk.setType(chunk.getType());
if (chunk.getType() == JRExpressionChunk.TYPE_TEXT)
{
convertedChunk.setText(
(i == 0 ? "" : " + ")
+ "\"" + JRStringUtil.escapeJavaStringLiteral(chunk.getText()) + "\""
+ (i == chunks.length - 1 ? "" : " + ")
);
}
else
{
convertedChunk.setText(chunk.getText());
}
convertedExpression.addChunk(convertedChunk);
}
}
}
return convertedExpression == null ? null : convertedExpression.getText();
}
private JRExpressionUtil()
{
}
}