Examples of javax.sound.midi.MetaMessage

javax.sound.midi.MetaMessage
idi.org>http://www.midi.org).
When data is being transported using MIDI wire protocol, a {@link ShortMessage} with the status value 0xFF represents a system reset message. In MIDI files, this same status value denotes a MetaMessage. The types of meta-message are distinguished from each other by the first byte that follows the status byte 0xFF. The subsequent bytes are data bytes. As with system exclusive messages, there are an arbitrary number of data bytes, depending on the type of MetaMessage. @see MetaEventListener @author David Rivas @author Kara Kytle

            for (Track track : tracks) {
                xhtml.startElement("p");
                for (int i = 0; i < track.size(); i++) {
                    MidiMessage message = track.get(i).getMessage();
                    if (message instanceof MetaMessage) {
                        MetaMessage meta = (MetaMessage) message;
                        // Types 1-15 are reserved for text events
                        if (meta.getType() >= 1 && meta.getType() <= 15) {
                            // FIXME: What's the encoding?
                            xhtml.characters(
                                    new String(meta.getData(), "ISO-8859-1"));
                        }
                    }
                }
                xhtml.endElement("p");
            }

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            for (Track track : tracks) {
                xhtml.startElement("p");
                for (int i = 0; i < track.size(); i++) {
                    MidiMessage message = track.get(i).getMessage();
                    if (message instanceof MetaMessage) {
                        MetaMessage meta = (MetaMessage) message;
                        // Types 1-15 are reserved for text events
                        if (meta.getType() >= 1 && meta.getType() <= 15) {
                            // FIXME: What's the encoding?
                            xhtml.characters(
                                    new String(meta.getData(), "ISO-8859-1"));
                        }
                    }
                }
                xhtml.endElement("p");
            }

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    /**
     * Test method getType() of class MetaMessage
     * 
     */
    public void test_getType() throws Exception {
        MetaMessage meta = new MetaMessage();
        assertEquals(0, meta.getType());


        byte[] bt = new byte[] { 9, -4, 34, 18 };
        MetaMessage1 meta2 = new MetaMessage1(bt);
        assertEquals(252, meta2.getType());
        bt[1] = 5;
        /**
         * value change
         */
        assertEquals(5, meta2.getType());
        
        meta.setMessage(10, new byte[] { 1, 2, 3, 4 }, 4);
        assertEquals(10, meta.getType());


        meta.setMessage(27, null, 0);
        assertEquals(27, meta.getType());
    }

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    /**
     * Test method getData() of class MetaMessage
     *
     */
    public void test_getData() throws Exception {
        MetaMessage meta = new MetaMessage();
        assertEquals(0, meta.getData().length);


        byte[] bt = new byte[] { 18, 43, 27, -90, 4 };
        MetaMessage1 meta1 = new MetaMessage1(bt);
        assertEquals(2, meta1.getData().length);
        assertEquals(-90, meta1.getData()[0]);
        assertEquals(4, meta1.getData()[1]);
        bt[3] = 67;
        bt[4] = -16;
        /**
         * values change
         */
        assertEquals(67, meta1.getData()[0]);
        assertEquals(-16, meta1.getData()[1]);


        MetaMessage1 meta2 = new MetaMessage1(new byte[] { 18, 43, 27 });
        assertEquals(0, meta2.getData().length);


        bt = new byte[] { 1, 2, 3, 4 };
        meta.setMessage(10, bt, 4);
        assertEquals(4, meta.getData().length);
        assertEquals(1, meta.getData()[0]);
        assertEquals(2, meta.getData()[1]);
        assertEquals(3, meta.getData()[2]);
        assertEquals(4, meta.getData()[3]);
        bt[0] = 34;
        bt[1] = -17;
        bt[2] = 90;
        bt[3] = -6;
        /**
         * values don't change
         */
        assertEquals(1, meta.getData()[0]);
        assertEquals(2, meta.getData()[1]);
        assertEquals(3, meta.getData()[2]);
        assertEquals(4, meta.getData()[3]);


        meta.setMessage(12, null, 0);
        assertNotNull(meta.getData());
        assertEquals(0, meta.getData().length);
    }

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    /**
     * Test method clone() of class MetaMessage.
     */
    public void test_clone1() {
        MetaMessage meta = new MetaMessage();
        assertTrue(meta.clone() != meta);
        assertEquals(meta.clone().getClass(), meta.getClass());
        MetaMessage tmeta;
        tmeta = (MetaMessage) meta.clone();
        assertEquals(meta.getLength(), tmeta.getLength());
        assertEquals(meta.getMessage().length, tmeta.getMessage().length);
        assertEquals(meta.getData().length, tmeta.getData().length);
        if (meta.getData().length != 0) {
            for (int i = 0; i < meta.getData().length; i++) {
                assertEquals(meta.getData()[i], tmeta.getData()[i]);
            }
        }
        if (meta.getMessage().length != 0) {
            for (int i = 0; i < meta.getMessage().length; i++) {
                assertEquals(meta.getMessage()[i], tmeta.getMessage()[i]);
            }
        }
    }

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    /**
     * Test method clone() of class MetaMessage.
     */
    public void test_clone2() throws Exception {
        MetaMessage meta = new MetaMessage();


        meta.setMessage(23, new byte[] { 23, 45, -90 }, 2);


        assertTrue(meta.clone() != meta);
        assertEquals(meta.clone().getClass(), meta.getClass());
        MetaMessage tmeta;
        tmeta = (MetaMessage) meta.clone();
        assertEquals(meta.getLength(), tmeta.getLength());
        assertEquals(meta.getMessage().length, tmeta.getMessage().length);
        assertEquals(meta.getData().length, tmeta.getData().length);
        if (meta.getData().length != 0) {
            for (int i = 0; i < meta.getData().length; i++) {
                assertEquals(meta.getData()[i], tmeta.getData()[i]);
            }
        }
        if (meta.getMessage().length != 0) {
            for (int i = 0; i < meta.getMessage().length; i++) {
                assertEquals(meta.getMessage()[i], tmeta.getMessage()[i]);
            }
        }
    }

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    /**
     * Test method clone() of class MetaMessage.
     */
    public void test_clone3() throws Exception {
        MetaMessage meta = new MetaMessage();
        meta.setMessage(23, null, 0);


        assertTrue(meta.clone() != meta);
        assertEquals(meta.clone().getClass(), meta.getClass());
        MetaMessage tmeta;
        tmeta = (MetaMessage) meta.clone();
        assertEquals(meta.getLength(), tmeta.getLength());
        assertEquals(meta.getMessage().length, tmeta.getMessage().length);
        assertEquals(meta.getData().length, tmeta.getData().length);
        if (meta.getData().length != 0) {
            for (int i = 0; i < meta.getData().length; i++) {
                assertEquals(meta.getData()[i], tmeta.getData()[i]);
            }
        }
        if (meta.getMessage().length != 0) {
            for (int i = 0; i < meta.getMessage().length; i++) {
                assertEquals(meta.getMessage()[i], tmeta.getMessage()[i]);
            }
        }
    }

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    public void test_clone4() throws Exception {
        byte[] bt = new byte[] {1, 2, 3, 4};
        MetaMessage1 meta = new MetaMessage1(bt);
        assertTrue(meta.clone() != meta);
        
        MetaMessage tmeta;
        tmeta = (MetaMessage) meta.clone();
        bt[0] = 34;
        bt[1] = 15;
        bt[2] = 89;
        bt[3] = 1;
        assertEquals(meta.getLength(), tmeta.getLength());
        assertEquals(meta.getMessage().length, tmeta.getMessage().length);
        assertEquals(meta.getData().length, tmeta.getData().length);
        /**
         * 'real' MetaMessage change, but 'clone' not
         */
        assertEquals(1, meta.getData()[0]);
        assertEquals(34, meta.getMessage()[0]);
        assertEquals(15, meta.getMessage()[1]);
        assertEquals(89, meta.getMessage()[2]);
        assertEquals(1, meta.getMessage()[3]);
        
        assertEquals(4, tmeta.getData()[0]);
        assertEquals(1, tmeta.getMessage()[0]);
        assertEquals(2, tmeta.getMessage()[1]);
        assertEquals(3, tmeta.getMessage()[2]);
        assertEquals(4, tmeta.getMessage()[3]);
    }

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    /**
     * Test constructors of class MetaMessage
     * with parameters and without its.
     */
    public void test_constructor_MetaMessage() throws Exception {
        MetaMessage meta = new MetaMessage();
        assertEquals(2, meta.getLength());
        assertEquals(255, meta.getStatus());
        assertEquals(0, meta.getType());
        assertEquals(2, meta.getMessage().length);
        assertEquals(-1, meta.getMessage()[0]);
        assertEquals(0, meta.getMessage()[1]);
        assertEquals(0, meta.getData().length);


        /**
         * the condition of the object must be the same
         * after throw out exception
         */
        try {
            meta = new MetaMessage1(null);
            fail("NullPointerException expected");
        } catch (NullPointerException e) {}


        assertEquals(2, meta.getLength());
        assertEquals(255, meta.getStatus());
        assertEquals(0, meta.getType());
        assertEquals(2, meta.getMessage().length);
        assertEquals(-1, meta.getMessage()[0]);
        assertEquals(0, meta.getMessage()[1]);
        assertEquals(0, meta.getData().length);


        byte[] bt = new byte[] {-87, 19, 4};
        MetaMessage1 meta3 = new MetaMessage1(bt);
        assertEquals(3, meta3.getLength());
        assertEquals(169, meta3.getStatus());
        assertEquals(19, meta3.getType());
        assertEquals(3, meta3.getMessage().length);
        assertEquals(-87, meta3.getMessage()[0]);
        assertEquals(19, meta3.getMessage()[1]);
        assertEquals(4, meta3.getMessage()[2]);
        assertEquals(0, meta3.getData().length);
        bt[0] = 10;
        bt[1] = 20;
        bt[2] = 30;
        /**
         * values change!!!
         */
        assertEquals(10, meta3.getStatus());
        assertEquals(20, meta3.getType());
        assertEquals(3, meta3.getMessage().length);
        assertEquals(10, meta3.getMessage()[0]);
        assertEquals(20, meta3.getMessage()[1]);
        assertEquals(30, meta3.getMessage()[2]);
        assertEquals(0, meta3.getData().length);


        bt = new byte[] {17, -9, 23, 45, 56};
        MetaMessage1 meta1 = new MetaMessage1(bt);
        assertEquals(5, meta1.getLength());
        assertEquals(17, meta1.getStatus());
        assertEquals(247, meta1.getType());
        assertEquals(5, meta1.getMessage().length);
        assertEquals(17, meta1.getMessage()[0]);
        assertEquals(-9, meta1.getMessage()[1]);
        assertEquals(23, meta1.getMessage()[2]);
        assertEquals(45, meta1.getMessage()[3]);
        assertEquals(56, meta1.getMessage()[4]);
        assertEquals(2, meta1.getData().length);
        assertEquals(45, meta1.getData()[0]);
        assertEquals(56, meta1.getData()[1]);
        bt[0] = 98;
        bt[2] = -56;
        bt[3] = -16;
        bt[4] = -3;
        /**
         * values change, but the begin of array that
         * return by method getData() doesn't displace!!!
         */
        assertEquals(5, meta1.getLength());
        assertEquals(98, meta1.getStatus());
        assertEquals(247, meta1.getType());
        assertEquals(5, meta1.getMessage().length);
        assertEquals(98, meta1.getMessage()[0]);
        assertEquals(-9, meta1.getMessage()[1]);
        assertEquals(-56, meta1.getMessage()[2]);
        assertEquals(-16, meta1.getMessage()[3]);
        assertEquals(-3, meta1.getMessage()[4]);
        assertEquals( 2, meta1.getData().length ); //!!!
        assertEquals(-16, meta1.getData()[0]);   //!!! 
        assertEquals(-3, meta1.getData()[1]);    //!!!
        byte[] nb = meta1.getData();
        nb[0] = 1;
        nb[1] = 2;
        /**
         * and here values don't change...
         */
        assertEquals(-16, meta1.getData()[0]);
        assertEquals(-3, meta1.getData()[1]);
        
        bt = new byte[] {17, -9, -23, -45, -56};
        MetaMessage1 meta4 = new MetaMessage1(bt);
        assertEquals(5, meta4.getLength());
        assertEquals(17, meta4.getStatus());
        assertEquals(247, meta4.getType());
        assertEquals(5, meta4.getMessage().length);
        assertEquals(17, meta4.getMessage()[0]);
        assertEquals(-9, meta4.getMessage()[1]);
        assertEquals(-23, meta4.getMessage()[2]);
        assertEquals(-45, meta4.getMessage()[3]);
        assertEquals(-56, meta4.getMessage()[4]);
        try {
            assertEquals(0, meta4.getData().length);
            fail("NegativeArraySizeException expected");
        } catch (NegativeArraySizeException e) {}


        meta.setMessage(10, new byte[100000], 16385);


        meta1 = new MetaMessage1(meta.getMessage());
        assertEquals(16390, meta1.getLength());
        assertEquals(255, meta1.getStatus());
        assertEquals(10, meta1.getType());
        assertEquals(16390, meta1.getMessage().length);
        assertEquals(-1, meta1.getMessage()[0]);

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     * Test method setMessage( int, byte[], int ) of 
     * class MetaMessage with parameters and without its.
     * Class was created using constructor MetaMessage()
     */
    public void test_setMessage1() throws Exception {
        MetaMessage meta = new MetaMessage();
        try {
            meta.setMessage(10, new byte[] { 1, 2, 3 }, 4);
            fail("InvalidMidiDataException expected");
        } catch (InvalidMidiDataException e) {
        }


        try {
            meta.setMessage(10, new byte[] { 1, 2, 3 }, -5);
            fail("InvalidMidiDataException expected");
        } catch (InvalidMidiDataException e) {
        }


        try {
            meta.setMessage(-1, new byte[] { 1, 2, 3 }, 3);
            fail("InvalidMidiDataException expected");
        } catch (InvalidMidiDataException e) {
        }


        try {
            meta.setMessage(128, new byte[] { 1, 2, 3 }, 3);
            fail("InvalidMidiDataException expected");
        } catch (InvalidMidiDataException e) {
        }


        meta.setMessage(18, new byte[] { 1, 2, 3 }, 0);


        assertEquals(3, meta.getLength());
        assertEquals(3, meta.getMessage().length);
        assertEquals(-1, meta.getMessage()[0]);
        assertEquals(18, meta.getMessage()[1]);
        assertEquals(0, meta.getMessage()[2]);
        assertEquals(0, meta.getData().length);


        meta.setMessage(10, new byte[100000], 65535);
        assertEquals(65540, meta.getLength());
        assertEquals(65540, meta.getMessage().length);
        assertEquals(-1, meta.getMessage()[0]);
        assertEquals(10, meta.getMessage()[1]);
        assertEquals(-125, meta.getMessage()[2]);
        assertEquals(-1, meta.getMessage()[3]);
        assertEquals(127, meta.getMessage()[4]);


        meta.setMessage(10, new byte[100000], 16385);
        assertEquals(16390, meta.getLength());
        assertEquals(16390, meta.getMessage().length);
        assertEquals(-1, meta.getMessage()[0]);
        assertEquals(10, meta.getMessage()[1]);
        assertEquals(-127, meta.getMessage()[2]);
        assertEquals(-128, meta.getMessage()[3]);
        assertEquals(1, meta.getMessage()[4]);


        byte[] bt = new byte[] { 1, 2, 3, 4 };
        meta.setMessage(10, bt, 4);
        assertEquals(7, meta.getLength());
        assertEquals(255, meta.getStatus());
        assertEquals(10, meta.getType());
        assertEquals(4, meta.getData().length);
        assertEquals(1, meta.getData()[0]);
        assertEquals(2, meta.getData()[1]);
        assertEquals(3, meta.getData()[2]);
        assertEquals(4, meta.getData()[3]);
        assertEquals(7, meta.getMessage().length);
        assertEquals(-1, meta.getMessage()[0]);
        assertEquals(10, meta.getMessage()[1]);
        assertEquals(4, meta.getMessage()[2]);
        assertEquals(1, meta.getMessage()[3]);
        assertEquals(2, meta.getMessage()[4]);
        assertEquals(3, meta.getMessage()[5]);
        assertEquals(4, meta.getMessage()[6]);
        bt[0] = 0;
        bt[1] = 1;
        bt[2] = 2;
        bt[3] = 3;
        /**
         * values don't change
         */
        assertEquals(7, meta.getLength());
        assertEquals(255, meta.getStatus());
        assertEquals(10, meta.getType());
        assertEquals(4, meta.getData().length);
        assertEquals(1, meta.getData()[0]);
        assertEquals(2, meta.getData()[1]);
        assertEquals(3, meta.getData()[2]);
        assertEquals(4, meta.getData()[3]);
        assertEquals(7, meta.getMessage().length);
        assertEquals(-1, meta.getMessage()[0]);
        assertEquals(10, meta.getMessage()[1]);
        assertEquals(4, meta.getMessage()[2]);
        assertEquals(1, meta.getMessage()[3]);
        assertEquals(2, meta.getMessage()[4]);
        assertEquals(3, meta.getMessage()[5]);
        assertEquals(4, meta.getMessage()[6]);


        meta.setMessage(12, null, 0);


        assertEquals(3, meta.getLength());
        assertEquals(255, meta.getStatus());
        assertEquals(12, meta.getType());
        assertEquals(0, meta.getData().length);
        assertEquals(3, meta.getMessage().length);
        assertEquals(-1, meta.getMessage()[0]);
        assertEquals(12, meta.getMessage()[1]);
        assertEquals(0, meta.getMessage()[2]);


        /**
         * I will testing following condition after throw out exception;
         * it must be the same after it 
         */
        try {
            meta.setMessage(10, new byte[] { 1, 2, 3, 4 }, 4);
        } catch (InvalidMidiDataException e) {}


        try {
            meta.setMessage(12, new byte[0], 9);
            fail("InvalidMidiDataException expected");
        } catch (InvalidMidiDataException e) {}
        assertEquals(7, meta.getLength());
        assertEquals(255, meta.getStatus());
        assertEquals(10, meta.getType());
        assertEquals(4, meta.getData().length);
        assertEquals(1, meta.getData()[0]);
        assertEquals(2, meta.getData()[1]);
        assertEquals(3, meta.getData()[2]);
        assertEquals(4, meta.getData()[3]);
        assertEquals(7, meta.getMessage().length);
        assertEquals(-1, meta.getMessage()[0]);
        assertEquals(10, meta.getMessage()[1]);
        assertEquals(4, meta.getMessage()[2]);
        assertEquals(1, meta.getMessage()[3]);
        assertEquals(2, meta.getMessage()[4]);
        assertEquals(3, meta.getMessage()[5]);
        assertEquals(4, meta.getMessage()[6]);


        try {
            meta.setMessage(12, null, 9);
            fail("NullPointerException expected");
        } catch (NullPointerException e) {}
        assertEquals(7, meta.getLength());
        assertEquals(255, meta.getStatus());
        assertEquals(10, meta.getType());
        assertEquals(4, meta.getData().length);
        assertEquals(1, meta.getData()[0]);
        assertEquals(2, meta.getData()[1]);
        assertEquals(3, meta.getData()[2]);
        assertEquals(4, meta.getData()[3]);
        assertEquals(7, meta.getMessage().length);
        assertEquals(-1, meta.getMessage()[0]);
        assertEquals(10, meta.getMessage()[1]);
        assertEquals(4, meta.getMessage()[2]);
        assertEquals(1, meta.getMessage()[3]);
        assertEquals(2, meta.getMessage()[4]);
        assertEquals(3, meta.getMessage()[5]);
        assertEquals(4, meta.getMessage()[6]);


        try {
            meta.setMessage(12, null, -9);
            fail("InvalidMidiDataException expected");
        } catch (InvalidMidiDataException e) {}
        assertEquals(7, meta.getLength());
        assertEquals(255, meta.getStatus());
        assertEquals(10, meta.getType());
        assertEquals(4, meta.getData().length);
        assertEquals(1, meta.getData()[0]);
        assertEquals(2, meta.getData()[1]);
        assertEquals(3, meta.getData()[2]);
        assertEquals(4, meta.getData()[3]);
        assertEquals(7, meta.getMessage().length);
        assertEquals(-1, meta.getMessage()[0]);
        assertEquals(10, meta.getMessage()[1]);
        assertEquals(4, meta.getMessage()[2]);
        assertEquals(1, meta.getMessage()[3]);
        assertEquals(2, meta.getMessage()[4]);
        assertEquals(3, meta.getMessage()[5]);
        assertEquals(4, meta.getMessage()[6]);
    }

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