/*

 * Copyright (c) 2001, 2011, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 * This source code is provided to illustrate the usage of a given feature

 * or technique and has been deliberately simplified. Additional steps

 * required for a production-quality application, such as security checks,

 * input validation and proper error handling, might not be present in

 * this sample code.

 */

package com.sun.tools.example.trace;

import java.io.*;

/**

 * StreamRedirectThread is a thread which copies it's input to

 * it's output and terminates when it completes.

 *

 * @author Robert Field

 */

class StreamRedirectThread extends Thread {

    private final Reader in;

    private final Writer out;

    private static final int BUFFER_SIZE = 2048;

    /**

     * Set up for copy.

     * @param name  Name of the thread

     * @param in    Stream to copy from

     * @param out   Stream to copy to

     */

    StreamRedirectThread(String name, InputStream in, OutputStream out) {

        super(name);

        this.in = new InputStreamReader(in);

        this.out = new OutputStreamWriter(out);

        setPriority(Thread.MAX_PRIORITY-1);

    }

    /**

     * Copy.

     */

    @Override

    public void run() {

        try {

            char[] cbuf = new char[BUFFER_SIZE];

            int count;

            while ((count = in.read(cbuf, 0, BUFFER_SIZE)) >= 0) {

                out.write(cbuf, 0, count);

            }

            out.flush();

        } catch(IOException exc) {

            System.err.println("Child I/O Transfer - " + exc);

        }

    }

}