Package org.apache.tools.ant.taskdefs.compilers

Source Code of org.apache.tools.ant.taskdefs.compilers.Javac13

/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001 The Apache Software Foundation.  All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in
*    the documentation and/or other materials provided with the
*    distribution.
*
* 3. The end-user documentation included with the redistribution, if
*    any, must include the following acknowlegement:
*       "This product includes software developed by the
*        Apache Software Foundation (http://www.apache.org/)."
*    Alternately, this acknowlegement may appear in the software itself,
*    if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Ant", and "Apache Software
*    Foundation" must not be used to endorse or promote products derived
*    from this software without prior written permission. For written
*    permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
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*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation.  For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/

package org.apache.tools.ant.taskdefs.compilers;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.taskdefs.LogOutputStream;
import org.apache.tools.ant.types.Commandline;

import java.lang.reflect.Method;
import java.io.*;

/**
* The implementation of the javac compiler for JDK 1.3
* This is primarily a cut-and-paste from the original javac task before it
* was refactored.
*
* @author James Davidson <a href="mailto:duncan@x180.com">duncan@x180.com</a>
* @author Robin Green <a href="mailto:greenrd@hotmail.com">greenrd@hotmail.com</a>
* @author <a href="mailto:stefan.bodewig@epost.de">Stefan Bodewig</a>
* @author <a href="mailto:jayglanville@home.com">J D Glanville</a>
*/
public class Javac13 extends DefaultCompilerAdapter {

    /**
     * Integer returned by the "Modern" jdk1.3 compiler to indicate success.
     */
    private static final int MODERN_COMPILER_SUCCESS = 0;

    public boolean execute() throws BuildException {
        attributes.log("Using modern compiler", Project.MSG_VERBOSE);
        Commandline cmd = setupJavacCommand();

        PrintStream err = System.err;
        PrintStream out = System.out;

        // Use reflection to be able to build on all JDKs >= 1.1:
        try {
            PrintStream logstr =
                new PrintStream(new LogOutputStream(attributes, Project.MSG_WARN));
            System.setOut(logstr);
            System.setErr(logstr);
            Class c = Class.forName ("com.sun.tools.javac.Main");
            Object compiler = c.newInstance ();
            Method compile = c.getMethod ("compile",
                new Class [] {(new String [] {}).getClass ()});
            int result = ((Integer) compile.invoke
                          (compiler, new Object[] {cmd.getArguments()})) .intValue ();
            return (result == MODERN_COMPILER_SUCCESS);
        } catch (Exception ex) {
            if (ex instanceof BuildException) {
                throw (BuildException) ex;
            } else {
                throw new BuildException("Error starting modern compiler", ex, location);
            }
        } finally {
            System.setErr(err);
            System.setOut(out);
        }
    }
}
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