Examples of java.io.FilterInputStream.mark()

java.io.FilterInputStream.mark()
Marks the current position in this input stream. A subsequent call to the reset method repositions this stream at the last marked position so that subsequent reads re-read the same bytes.
The readlimit argument tells this input stream to allow that many bytes to be read before the mark position gets invalidated.
This method simply performs in.mark(readlimit). @param readlimit the maximum limit of bytes that can be read beforethe mark position becomes invalid. @see java.io.FilterInputStream#in @see java.io.FilterInputStream#reset()

                    return 0;
                }
                return in.read(buffer, off, Math.min(10, max));
            }
        };
        in.mark(10000);
        byte[] test = new byte[1000];


        // readFully is not supposed to call read when reading 0 bytes
        assertEquals(0, IOUtils.readFully(in, test, 0, 0));
        assertEquals(0, readCount.get());

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        assertEquals(1000, IOUtils.readFully(in, test, 0, 1000));
        IOUtilsTest.assertEquals(data, test);
        test = new byte[1001];
        in.reset();
        in.mark(10000);
        assertEquals(1000, IOUtils.readFully(in, test, 0, 1001));
        assertEquals(0, IOUtils.readFully(in, test, 0, 0));
    }


    public void testSkipFully() throws IOException {

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        FilterInputStream in = new FilterInputStream(new ByteArrayInputStream(data)) {
            public int read(byte[] buffer, int off, int max) throws IOException {
                return in.read(buffer, off, Math.min(10, max));
            }
        };
        in.mark(10000);
        IOUtils.skipFully(in, 1000);
        assertEquals(-1, in.read());
        in.reset();
        try {
            IOUtils.skipFully(in, 1001);

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                    return 0;
                }
                return in.read(buffer, off, Math.min(10, max));
            }
        };
        in.mark(10000);
        byte[] test = new byte[1000];


        // readFully is not supposed to call read when reading 0 bytes
        assertEquals(0, IOUtils.readFully(in, test, 0, 0));
        assertEquals(0, readCount.get());

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        assertEquals(1000, IOUtils.readFully(in, test, 0, 1000));
        IOUtilsTest.assertEquals(data, test);
        test = new byte[1001];
        in.reset();
        in.mark(10000);
        assertEquals(1000, IOUtils.readFully(in, test, 0, 1001));
        assertEquals(0, IOUtils.readFully(in, test, 0, 0));
    }


    public void testSkipFully() throws IOException {

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        FilterInputStream in = new FilterInputStream(new ByteArrayInputStream(data)) {
            public int read(byte[] buffer, int off, int max) throws IOException {
                return in.read(buffer, off, Math.min(10, max));
            }
        };
        in.mark(10000);
        IOUtils.skipFully(in, 1000);
        assertEquals(-1, in.read());
        in.reset();
        try {
            IOUtils.skipFully(in, 1001);

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                    return 0;
                }
                return in.read(buffer, off, Math.min(10, max));
            }
        };
        in.mark(10000);
        byte[] test = new byte[1000];


        // readFully is not supposed to call read when reading 0 bytes
        assertEquals(0, IOUtils.readFully(in, test, 0, 0));
        assertEquals(0, readCount.get());

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        assertEquals(1000, IOUtils.readFully(in, test, 0, 1000));
        IOUtilsTest.assertEquals(data, test);
        test = new byte[1001];
        in.reset();
        in.mark(10000);
        assertEquals(1000, IOUtils.readFully(in, test, 0, 1001));
        assertEquals(0, IOUtils.readFully(in, test, 0, 0));
    }


    public void testSkipFully() throws IOException {

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        FilterInputStream in = new FilterInputStream(new ByteArrayInputStream(data)) {
            public int read(byte[] buffer, int off, int max) throws IOException {
                return in.read(buffer, off, Math.min(10, max));
            }
        };
        in.mark(10000);
        IOUtils.skipFully(in, 1000);
        assertEquals(-1, in.read());
        in.reset();
        try {
            IOUtils.skipFully(in, 1001);

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                    return 0;
                }
                return in.read(buffer, off, Math.min(10, max));
            }
        };
        in.mark(10000);
        byte[] test = new byte[1000];


        // readFully is not supposed to call read when reading 0 bytes
        assertEquals(0, IOUtils.readFully(in, test, 0, 0));
        assertEquals(0, readCount.get());

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