/*
* 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.IOException;
import java.io.LineNumberReader;
import java.io.StringReader;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRExpression;
import net.sf.jasperreports.engine.fill.JREvaluator;
import bsh.EvalError;
import bsh.Interpreter;
import bsh.TargetError;
/**
* @author Teodor Danciu (teodord@users.sourceforge.net)
* @version $Id: JRBshEvaluator.java 3939 2010-08-20 09:52:00Z teodord $
*/
public class JRBshEvaluator extends JREvaluator
{
/**
*
*/
private String bshScript;
private Interpreter interpreter;
/**
*
*/
public JRBshEvaluator(String bshScript) throws JRException
{
super();
this.bshScript = bshScript;
interpreter = new Interpreter();
interpreter.setClassLoader(Thread.currentThread().getContextClassLoader());
try
{
interpreter.eval(new StringReader(bshScript));
}
catch(EvalError e)
{
throw new JRException(
"Error evaluating report expressions BeanShell script."
+ "\nMessage : " + e.getMessage()
+ "\nLine " + e.getErrorLineNumber() + " : " + extractLineContent(e)
);
}
}
/**
*
*/
public void verify(Collection expressions) throws JRException
{
try
{
interpreter.eval("bshEvaluator = createBshEvaluator()");
if (expressions != null)
{
for(Iterator it = expressions.iterator(); it.hasNext();)
{
JRExpression expression = (JRExpression)it.next();
interpreter.eval("bshEvaluator.evaluateOld(" + expression.getId() + ")");
}
}
}
catch(TargetError te)
{
//ignore
}
catch(EvalError e)
{
throw new JRException(
"Error testing report expressions BeanShell script."
+ "\nMessage : " + e.getMessage()
+ "\nLine " + e.getErrorLineNumber() + " : " + extractLineContent(e)
);
}
}
/**
*
*/
protected void customizedInit(
Map pars,
Map fldsm,
Map varsm
) throws JRException
{
try
{
interpreter.set("calculator", this);
interpreter.set("fldsm", fldsm);
interpreter.set("varsm", varsm);
interpreter.set("parsm", pars);
interpreter.eval("bshEvaluator = createBshEvaluator()");
interpreter.eval("bshEvaluator.init(calculator, parsm, fldsm, varsm)");
}
catch(EvalError e)
{
throw new JRException("Error initializing report BeanShell calculator.", e);
}
}
/**
*
*/
protected Object evaluateOld(int id) throws Throwable //NOSONAR
{
try
{
return interpreter.eval("bshEvaluator.evaluateOld(" + id + ")");
}
catch(TargetError te)
{
throw te.getTarget();
}
catch(EvalError ee)
{
throw ee;
}
}
/**
*
*/
protected Object evaluateEstimated(int id) throws Throwable //NOSONAR
{
try
{
return interpreter.eval("bshEvaluator.evaluateEstimated(" + id + ")");
}
catch(TargetError te)
{
throw te.getTarget();
}
catch(EvalError ee)
{
throw ee;
}
}
/**
*
*/
protected Object evaluate(int id) throws Throwable //NOSONAR
{
try
{
return interpreter.eval("bshEvaluator.evaluate(" + id + ")");
}
catch(TargetError te)
{
throw te.getTarget();
}
catch(EvalError ee)
{
throw ee;
}
}
/**
*
*/
private String extractLineContent(EvalError e)
{
String lineContent = "";
LineNumberReader reader = null;
try
{
reader = new LineNumberReader(new StringReader(bshScript));
int lineNumber = e.getErrorLineNumber();
for(int i = 0; i < lineNumber; i++)
{
lineContent = reader.readLine();
}
}
catch(IOException ioe)
{
}
finally
{
if (reader != null)
{
try
{
reader.close();
}
catch(IOException ioe)
{
}
}
}
return lineContent;
}
}