/*

 * Copyright (c) 1997, 2008, 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.

 */

/*

 * The Original Code is HAT. The Initial Developer of the

 * Original Code is Bill Foote, with contributions from others

 * at JavaSoft/Sun.

 */

package com.sun.tools.hat.internal.parser;

import java.io.DataInputStream;

import java.io.InputStream;

/**

 * A DataInputStream that keeps track of total bytes read

 * (in effect 'position' in stream) so far.

 *

 */

public class PositionDataInputStream extends DataInputStream {

    public PositionDataInputStream(InputStream in) {

        super(in instanceof PositionInputStream?

              in : new PositionInputStream(in));

    }

    public boolean markSupported() {

        return false;

    }

    public void mark(int readLimit) {

        throw new UnsupportedOperationException("mark");

    }

    public void reset() {

        throw new UnsupportedOperationException("reset");

    }

    public long position() {

        return ((PositionInputStream)in).position();

    }

}