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Free Java Reporting Library
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2019 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.engine.design;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.InputStream;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JasperReportsContext;
/**
* @author Teodor Danciu ([email protected])
*/
public class JRJavacCompiler extends JRAbstractMultiClassCompiler
{
/**
*
*/
public JRJavacCompiler(JasperReportsContext jasperReportsContext)
{
super(jasperReportsContext);
}
@Override
public String compileClasses(File[] sourceFiles, String classpath) throws JRException
{
String[] source = new String[sourceFiles.length + 3];
source[0] = "javac";
source[1] = "-classpath";
source[2] = classpath;
for (int i = 0; i < sourceFiles.length; i++)
{
source[i + 3] = sourceFiles[i].getPath();
}
try
{
// Compile the source file and arrange to read the errors if any.
Process compile = Runtime.getRuntime().exec(source);
InputStream errFile = compile.getErrorStream();
// Read the error messages (if any) into the ByteArrayOutputStream
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int count = 0;
do
{
count = errFile.read(buffer);
if (count > 0)
{
baos.write(buffer, 0, count);
}
} while (count >= 0);
if( baos.toString().indexOf("error") != -1 )
{
return baos.toString();
}
return null;
}
catch (Exception e)
{
StringBuilder files = new StringBuilder();
for (int i = 0; i < sourceFiles.length; ++i)
{
files.append(sourceFiles[i].getPath());
files.append(' ');
}
throw
new JRException(
EXCEPTION_MESSAGE_KEY_JAVA_SOURCE_COMPILE_ERROR,
new Object[]{files},
e);
}
}
}