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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.compilers;
import java.io.File;
import java.util.Iterator;
import org.mozilla.javascript.Context;
import org.mozilla.javascript.ContextFactory;
import org.mozilla.javascript.EvaluatorException;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRExpression;
import net.sf.jasperreports.engine.JasperReportsContext;
import net.sf.jasperreports.engine.design.JRCompilationUnit;
import net.sf.jasperreports.engine.design.JRSourceCompileTask;
import net.sf.jasperreports.engine.util.CompositeExpressionChunkVisitor;
import net.sf.jasperreports.engine.util.JRExpressionUtil;
/**
* Compiler for reports that use JavaScript as expression language.
*
* This implementation produces evaluators that compile expressions at fill time.
*
* @author Lucian Chirita ([email protected])
* @see JavaScriptEvaluator
* @see JavaScriptClassCompiler
*/
public class JavaScriptCompiler extends JavaScriptCompilerBase
{
/**
* Creates a JavaScript compiler.
*/
public JavaScriptCompiler(JasperReportsContext jasperReportsContext)
{
super(jasperReportsContext);
}
@Override
protected void checkLanguage(String language) throws JRException
{
//NOOP
}
@Override
protected String compileUnits(JRCompilationUnit[] units, String classpath,
File tempDirFile) throws JRException
{
Context context = ContextFactory.getGlobal().enterContext();
try
{
Errors errors = new Errors();
for (int i = 0; i < units.length; i++)
{
JRCompilationUnit unit = units[i];
JavaScriptCompileData compileData = new JavaScriptCompileData();
JRSourceCompileTask compileTask = unit.getCompileTask();
for (Iterator it = compileTask.getExpressions().iterator(); it.hasNext();)
{
JRExpression expr = it.next();
int id = compileTask.getExpressionId(expr);
ScriptExpressionVisitor defaultVisitor = defaultExpressionCreator();
JRExpressionUtil.visitChunks(expr, defaultVisitor);
String defaultExpression = defaultVisitor.getScript();
//compile the default expression to catch syntax errors
try
{
context.compileString(defaultExpression, "expression", 0, null);
}
catch (EvaluatorException e)
{
errors.addError(e);
}
if (!errors.hasErrors())
{
ScriptExpressionVisitor oldVisitor = oldExpressionCreator();
ScriptExpressionVisitor estimatedVisitor = estimatedExpressionCreator();
JRExpressionUtil.visitChunks(expr, new CompositeExpressionChunkVisitor(oldVisitor, estimatedVisitor));
compileData.addExpression(id, defaultExpression, estimatedVisitor.getScript(), oldVisitor.getScript());
}
}
if (!errors.hasErrors())
{
unit.setCompileData(compileData);
}
}
return errors.errorMessage();
}
finally
{
Context.exit();
}
}
}