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ProGuard is a free Java class file shrinker, optimizer, and obfuscator. It removes unused classes, fields, methods, and attributes. It then optimizes the bytecode. It then renames the remaining classes, fields, and methods using short meaningless names. Finally, it preverifies the processed code for Java 6 or for Java Micro Edition.

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/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification
 *             of Java bytecode.
 *
 * Copyright (c) 2002-2009 Eric Lafortune ([email protected])
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * This program 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 General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard.gui;

import javax.swing.*;
import java.io.*;
import java.lang.reflect.InvocationTargetException;


/**
 * This PrintStream appends its output to a given text area.
 *
 * @author Eric Lafortune
 */
final class TextAreaOutputStream extends FilterOutputStream implements Runnable
{
    private final JTextArea textArea;


    public TextAreaOutputStream(JTextArea textArea)
    {
        super(new ByteArrayOutputStream());

        this.textArea = textArea;
    }


    // Implementation for FilterOutputStream.

    public void flush() throws IOException
    {
        super.flush();

        try
        {
            // Append the accumulated buffer contents to the text area.
            SwingUtil.invokeAndWait(this);
        }
        catch (Exception e)
        {
            // Nothing.
        }
    }


    // Implementation for Runnable.

    public void run()
    {
        ByteArrayOutputStream out = (ByteArrayOutputStream)super.out;

        // Has any new text been written?
        String text = out.toString();
        if (text.length() > 0)
        {
            // Append the accumulated text to the text area.
            textArea.append(text);

            // Clear the buffer.
            out.reset();
        }
    }
}