/*
* 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/>.
*/
package net.sf.jasperreports.compilers;
import java.io.File;
import java.io.Serializable;
import java.util.Iterator;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRExpression;
import net.sf.jasperreports.engine.design.JRAbstractCompiler;
import net.sf.jasperreports.engine.design.JRCompilationSourceCode;
import net.sf.jasperreports.engine.design.JRCompilationUnit;
import net.sf.jasperreports.engine.design.JRSourceCompileTask;
import net.sf.jasperreports.engine.fill.JREvaluator;
import org.mozilla.javascript.Context;
import org.mozilla.javascript.ContextFactory;
import org.mozilla.javascript.EvaluatorException;
/**
* Compiler for reports that use JavaScript as expression language.
*
* @author Lucian Chirita (lucianc@users.sourceforge.net)
* @version $Id: JavaScriptCompiler.java 3032 2009-08-27 11:32:28Z teodord $
*/
public class JavaScriptCompiler extends JRAbstractCompiler
{
/**
* Creates a JavaScript compiler.
*/
public JavaScriptCompiler()
{
super(false);
}
protected void checkLanguage(String language) throws JRException
{
//NOOP
}
protected String compileUnits(JRCompilationUnit[] units, String classpath,
File tempDirFile) throws JRException
{
Context context = ContextFactory.getGlobal().enterContext();
try
{
StringBuffer errors = new StringBuffer();
int errorCount = 0;
for (int i = 0; i < units.length; i++)
{
JRCompilationUnit unit = units[i];
JavaScriptCompileData compileData = new JavaScriptCompileData();
for (Iterator it = unit.getExpressions().iterator(); it.hasNext();)
{
JRExpression expr = (JRExpression) it.next();
int id = unit.getCompileTask().getExpressionId(expr).intValue();
JavaScriptCompileData.Expression jsExpr =
JavaScriptEvaluator.createJSExpression(expr);
//compile the default expression to catch syntax errors
try
{
context.compileString(jsExpr.getDefaultExpression(),
"expression", 0, null);
}
catch (EvaluatorException e)
{
++errorCount;
appendError(errors, errorCount, e);
}
compileData.addExpression(id, jsExpr);
}
unit.setCompileData(compileData);
}
String errorsMessage = null;
if (errorCount > 0)
{
errorsMessage = errorCount + " error(s):\n" + errors;
}
return errorsMessage;
}
finally
{
Context.exit();
}
}
protected void appendError(StringBuffer errors, int errorCount,
EvaluatorException e)
{
errors.append(errorCount);
errors.append(". ");
String message = e.getMessage();
errors.append(message);
errors.append(" at column ");
errors.append(e.columnNumber());
String lineSource = e.lineSource();
if (lineSource != null)
{
errors.append(" in line\n");
errors.append(lineSource);
}
errors.append("\n");
}
protected JRCompilationSourceCode generateSourceCode(
JRSourceCompileTask sourceTask) throws JRException
{
//no source code
return null;
}
protected String getSourceFileName(String unitName)
{
return unitName + ".js";
}
protected JREvaluator loadEvaluator(Serializable compileData,
String unitName) throws JRException
{
if (!(compileData instanceof JavaScriptCompileData))
{
throw new JRException("Invalid compile data, should be an instance of "
+ JavaScriptCompileData.class.getName());
}
JavaScriptCompileData jsCompileData = (JavaScriptCompileData) compileData;
return new JavaScriptEvaluator(jsCompileData);
}
}