/*

 * Copyright (c) 2015, 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.ByteArrayOutputStream;

import java.io.OutputStream;

import java.io.PrintStream;

import jdk.internal.logger.BootstrapLogger;

/**

 * We use an instance of this class to check what the logging system has printed

 * on System.err.

 */

class LogStream extends OutputStream {

    static final PrintStream err = System.err;

    private final ByteArrayOutputStream BAOS = new ByteArrayOutputStream();

    LogStream() {

        super();

    }

    @Override

    public synchronized void write(int b) {

        BAOS.write(b);

        err.write(b);

    }

    String drain() {

        BootstrapLoggerUtils.awaitPending();

        synchronized (this) {

            String txt = BAOS.toString();

            BAOS.reset();

            return txt;

        }

    }

}