net.sf.jasperreports.engine.design.JRJdk13Compiler.java Source code

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Here is the source code for net.sf.jasperreports.engine.design.JRJdk13Compiler.java

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/*
 * 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 <http://www.gnu.org/licenses/>.
 */
package net.sf.jasperreports.engine.design;

//import java.io.ByteArrayOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.PrintWriter;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JasperReportsContext;
import net.sf.jasperreports.engine.util.JRClassLoader;

/**
 * @author Teodor Danciu (teodord@users.sourceforge.net)
 */
public class JRJdk13Compiler extends JRAbstractMultiClassCompiler {

    /**
     *  
     */
    static final Log log = LogFactory.getLog(JRJdk13Compiler.class);

    /**
     *
     */
    private static final int MODERN_COMPILER_SUCCESS = 0;

    /**
     *
     */
    public JRJdk13Compiler(JasperReportsContext jasperReportsContext) {
        super(jasperReportsContext);
    }

    @Override
    public String compileClasses(File[] sourceFiles, String classpath) throws JRException {
        String[] source = new String[sourceFiles.length + 2];
        for (int i = 0; i < sourceFiles.length; i++) {
            source[i] = sourceFiles[i].getPath();
        }
        source[sourceFiles.length] = "-classpath";
        source[sourceFiles.length + 1] = classpath;

        String errors = null;

        try {
            Class<?> clazz = JRClassLoader.loadClassForRealName("com.sun.tools.javac.Main");
            Object compiler = clazz.getDeclaredConstructor().newInstance();

            try {
                Method compileMethod = clazz.getMethod("compile",
                        new Class[] { String[].class, PrintWriter.class });
                ByteArrayOutputStream baos = new ByteArrayOutputStream();
                int result = (Integer) compileMethod.invoke(compiler,
                        new Object[] { source, new PrintWriter(baos) });

                if (result != MODERN_COMPILER_SUCCESS) {
                    errors = baos.toString();
                } else {
                    if (log.isInfoEnabled() && baos.size() > 0) {
                        log.info(baos.toString());
                    }
                }
            } catch (NoSuchMethodException ex) {
                Method compileMethod = clazz.getMethod("compile", new Class[] { String[].class });

                int result = (Integer) compileMethod.invoke(compiler, new Object[] { source });
                if (result != MODERN_COMPILER_SUCCESS) {
                    errors = "See error messages above.";
                }
            }
        } catch (ClassNotFoundException | NoSuchMethodException | InvocationTargetException | IllegalAccessException
                | InstantiationException 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);
        }

        return errors;
    }
}