/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2009 Jaspersoft Corporation. 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 <http://www.gnu.org/licenses/>.
*/
/*
* Contributors:
* Peter Severin - peter_p_s@users.sourceforge.net
*/
package net.sf.jasperreports.compilers;
import groovyjarjarasm.asm.ClassVisitor;
import groovyjarjarasm.asm.ClassWriter;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.Serializable;
import java.io.UnsupportedEncodingException;
import java.util.HashMap;
import java.util.Map;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRReport;
import net.sf.jasperreports.engine.JRRuntimeException;
import net.sf.jasperreports.engine.design.JRAbstractJavaCompiler;
import net.sf.jasperreports.engine.design.JRCompilationSourceCode;
import net.sf.jasperreports.engine.design.JRCompilationUnit;
import net.sf.jasperreports.engine.design.JRDefaultCompilationSourceCode;
import net.sf.jasperreports.engine.design.JRSourceCompileTask;
import org.codehaus.groovy.ast.ClassNode;
import org.codehaus.groovy.control.CompilationFailedException;
import org.codehaus.groovy.control.CompilationUnit;
import org.codehaus.groovy.control.CompilerConfiguration;
import org.codehaus.groovy.control.Phases;
/**
* Calculator compiler that uses groovy to compile expressions.
*
* @author Teodor Danciu (teodord@users.sourceforge.net), Peter Severin (peter_p_s@users.sourceforge.net)
* @version $Id: JRGroovyCompiler.java 3837 2010-05-31 06:55:21Z lucianc $
*/
public class JRGroovyCompiler extends JRAbstractJavaCompiler
{
protected static final String SOURCE_ENCODING = "UTF-8";
public JRGroovyCompiler()
{
super(false);
}
protected String compileUnits(JRCompilationUnit[] units, String classpath, File tempDirFile) throws JRException
{
CompilerConfiguration config = new CompilerConfiguration();
config.setSourceEncoding(SOURCE_ENCODING);
//config.setClasspath(classpath);
CompilationUnit unit = new CompilationUnit(config);
for (int i = 0; i < units.length; i++)
{
try
{
byte[] sourceBytes = units[i].getSourceCode().getBytes(SOURCE_ENCODING);
unit.addSource("calculator_" + units[i].getName(), new ByteArrayInputStream(sourceBytes));
}
catch (UnsupportedEncodingException e)
{
throw new JRRuntimeException(e);
}
}
ClassCollector collector = new ClassCollector();
unit.setClassgenCallback(collector);
try
{
unit.compile(Phases.CLASS_GENERATION);
}
catch (CompilationFailedException e)
{
throw new JRException(
"Errors were encountered when compiling report expressions class file:\n"
+ e.toString(),
e
);
}
if (collector.classes.size() < units.length)
{
throw new JRException("Too few groovy class were generated.");
}
else if (collector.classCount > units.length)
{
throw new JRException(
"Too many groovy classes were generated.\n"
+ "Please make sure that you don't use Groovy features such as closures that are not supported by this report compiler.\n"
);
}
for (int i = 0; i < units.length; i++)
{
units[i].setCompileData((Serializable) collector.classes.get(units[i].getName()));
}
return null;
}
/**
*
*/
private static class ClassCollector extends CompilationUnit.ClassgenCallback
{
public Map classes = new HashMap();
public int classCount;
/**
* @see org.codehaus.groovy.control.CompilationUnit.ClassgenCallback#call(
* groovyjarjarasm.asm.ClassVisitor,
* org.codehaus.groovy.ast.ClassNode)
*/
public void call(ClassVisitor writer, ClassNode node) throws CompilationFailedException
{
classCount++;
String name = node.getName();
if (!classes.containsKey(name))
{
byte[] bytes = ((ClassWriter) writer).toByteArray();
classes.put(name, bytes);
}
}
}
protected void checkLanguage(String language) throws JRException
{
if (
!JRReport.LANGUAGE_GROOVY.equals(language)
&& !JRReport.LANGUAGE_JAVA.equals(language)
)
{
throw
new JRException(
"Language \"" + language
+ "\" not supported by this report compiler.\n"
+ "Expecting \"groovy\" or \"java\" instead."
);
}
}
protected JRCompilationSourceCode generateSourceCode(JRSourceCompileTask sourceTask) throws JRException
{
return new JRDefaultCompilationSourceCode(JRGroovyGenerator.generateClass(sourceTask), null);
}
protected String getSourceFileName(String unitName)
{
return unitName + ".groovy";
}
}