/*

 * Copyright (c) 1997, 2000, 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.

 *

 * 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.

 */

/**/

import java.io.*;

public class ABCOutputStream extends OutputStream {

    int len;

    int count = 0;

    char next = ABCInputStream.firstChar();

    ABCOutputStream(int len) {

        this.len = len;

    }

    public void write(int c) throws IOException {

        if (count >= len)

            throw new IOException("Wrote too many characters");

        if (c != next)

            throw new IOException("Wrong character written: "

                                  + "Expected '" + next + "', "

                                  + "got '" + (char)c + "'");

        next = ABCInputStream.nextChar(next);

        count++;

    }

    public void write(byte buf[], int off, int len) throws IOException {

        for (int i = off; i < off + len; i++)

            write(buf[i]);

    }

    public void close() throws IOException {

        if (len == 0)

            throw new IOException("Already closed");

        else if (count < len)

            throw new IOException("Wrote too few characters");

        len = 0;

    }

}