/*

 * Copyright (c) 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.

 *

 * 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.*;

/**

 * @test

 * @bug 7015589

 * @summary Test that buffering streams are considered closed even when the

 *    close or flush from the underlying stream fails.

 */

public class FailingFlushAndClose {

    static int failed;

    static void fail(String msg) {

        System.err.println("FAIL: " + msg);

        failed++;

    }

    static void failWithIOE(String msg) throws IOException {

        fail(msg);

        throw new IOException(msg);

    }

    static class FailingCloseInputStream extends InputStream {

        boolean closed;

        @Override

        public int read()throws IOException {

            if (closed)

                failWithIOE("input stream is closed");

            return 1;

        }

        @Override

        public void close() throws IOException {

            if (!closed) {

                closed = true;

                throw new IOException("close failed");

            }

        }

    }

    static class FailingCloseOutputStream extends OutputStream {

        boolean closed;

        @Override

        public void write(int b) throws IOException {

            if (closed)

                failWithIOE("output stream is closed");

        }

        @Override

        public void flush() throws IOException {

            if (closed)

                failWithIOE("output stream is closed");

        }

        @Override

        public void close() throws IOException {

            if (!closed) {

                closed = true;

                throw new IOException("close failed");

            }

        }

    }

    static class FailingFlushOutputStream extends OutputStream {

        boolean closed;

        @Override

        public void write(int b) throws IOException {

            if (closed)

                failWithIOE("output stream is closed");

        }

        @Override

        public void flush() throws IOException {

            if (closed) {

                failWithIOE("output stream is closed");

            } else {

                throw new IOException("flush failed");

            }

        }

        @Override

        public void close() throws IOException {

            closed = true;

        }

    }

    static class FailingCloseReader extends Reader {

        boolean closed;

        @Override

        public int read(char[] cbuf, int off, int len) throws IOException {

            if (closed)

                failWithIOE("reader is closed");

            return 1;

        }

        @Override

        public void close() throws IOException {

            if (!closed) {

                closed = true;

                throw new IOException("close failed");

            }

        }

    }

    static class FailingCloseWriter extends Writer {

        boolean closed;

        @Override

        public void write(char[] cbuf, int off, int len) throws IOException {

            if (closed)

                failWithIOE("writer is closed");

        }

        @Override

        public void flush() throws IOException {

            if (closed)

                failWithIOE("writer is closed");

        }

        @Override

        public void close() throws IOException {

            if (!closed) {

                closed = true;

                throw new IOException("close failed");

            }

        }

    }

    static class FailingFlushWriter extends Writer {

        boolean closed;

        @Override

        public void write(char[] cbuf, int off, int len) throws IOException {

            if (closed)

                failWithIOE("writer is closed");

        }

        @Override

        public void flush() throws IOException {

            if (closed) {

                failWithIOE("writer is closed");

            } else {

                throw new IOException("flush failed");

            }

        }

        @Override

        public void close() throws IOException {

            if (!closed) {

                closed = true;

                throw new IOException("close failed");

            }

        }

    }

    static void testFailingClose(InputStream in) throws IOException {

        System.out.println(in.getClass());

        in.read(new byte[100]);

        try {

            in.close();

            fail("close did not fail");

        } catch (IOException expected) { }

        try {

            in.read(new byte[100]);

            fail("read did not fail");

        } catch (IOException expected) { }

    }

    static void testFailingClose(OutputStream out) throws IOException {

        System.out.println(out.getClass());

        out.write(1);

        try {

            out.close();

            fail("close did not fail");

        } catch (IOException expected) { }

        try {

            out.write(1);

            if (!(out instanceof BufferedOutputStream))

                fail("write did not fail");

        } catch (IOException expected) { }

    }

    static void testFailingFlush(OutputStream out) throws IOException {

        System.out.println(out.getClass());

        out.write(1);

        try {

            out.flush();

            fail("flush did not fail");

        } catch (IOException expected) { }

        if (out instanceof BufferedOutputStream) {

            out.write(1);

            try {

                out.close();

                fail("close did not fail");

            } catch (IOException expected) { }

        }

    }

    static void testFailingClose(Reader r) throws IOException {

        System.out.println(r.getClass());

        r.read(new char[100]);

        try {

            r.close();

            fail("close did not fail");

        } catch (IOException expected) { }

        try {

            r.read(new char[100]);

            fail("read did not fail");

        } catch (IOException expected) { }

    }

    static void testFailingClose(Writer w) throws IOException {

        System.out.println(w.getClass());

        w.write("message");

        try {

            w.close();

            fail("close did not fail");

        } catch (IOException expected) { }

        try {

            w.write("another message");

            fail("write did not fail");

        } catch (IOException expected) { }

    }

    static void testFailingFlush(Writer w) throws IOException {

        System.out.println(w.getClass());

        w.write("message");

        try {

            w.flush();

            fail("flush did not fail");

        } catch (IOException expected) { }

        if (w instanceof BufferedWriter) {

            // assume this message will be buffered

            w.write("another message");

            try {

                w.close();

                fail("close did not fail");

            } catch (IOException expected) { }

        }

    }

    public static void main(String[] args) throws IOException {

        testFailingClose(new BufferedInputStream(new FailingCloseInputStream()));

        testFailingClose(new BufferedOutputStream(new FailingCloseOutputStream()));

        testFailingClose(new BufferedReader(new FailingCloseReader()));

        testFailingClose(new BufferedWriter(new FailingCloseWriter()));

        testFailingFlush(new BufferedOutputStream(new FailingFlushOutputStream()));

        testFailingFlush(new BufferedWriter(new FailingFlushWriter()));

        if (failed > 0)

            throw new RuntimeException(failed + " test(s) failed - see log for details");

    }

}