Examples of org.apache.derby.client.am.ByteArrayCombinerStream

org.apache.derby.client.am.ByteArrayCombinerStream
A stream whose source is a list of byte arrays. This class was created when first implementing the JDBC 4 length less overloads in the client driver. The reason was missing support for streaming data with unknown length from the client to the server. The purpose of the stream is to avoid having to repeatedly copy data to grow the byte buffer, or doing a single big copy to combine the byte arrays in the end. This is important for the temporary solution, since we must materialize the stream to find the length anyway. If there is less data available than the specified length, an exception is thrown. Available data is determined by the length of the byte arrays, not the contents of them. A byte array with all 0's is considered valid data. Besides from truncation, this stream does not change the underlying data in any way.

        super(name);
    }


    public void testCombineNullRead()
            throws IOException {
        combiner = new ByteArrayCombinerStream(null, 0);
        assertEquals(-1, combiner.read());
    }

View Full Code Here

        assertEquals(-1, combiner.read());
    }


    public void testCombineNullReadArray()
            throws IOException {
        combiner = new ByteArrayCombinerStream(null, 0);
        assertEquals(-1, combiner.read(new byte[10], 0, 10));
    }

View Full Code Here

        assertEquals(-1, combiner.read(new byte[10], 0, 10));
    }


    public void testCombineAvailableNull()
            throws IOException {
        combiner = new ByteArrayCombinerStream(null, 0);
        assertEquals(0, combiner.available());
    }

View Full Code Here

    public void testCombineAvailable4bytes()
            throws IOException {
        byte[] array = {65,66,77,79};
        ArrayList list = new ArrayList(1);
        list.add(array);
        combiner = new ByteArrayCombinerStream(list, 4);
        assertEquals(4, combiner.available());
    }

View Full Code Here

            throws IOException {
        byte[] array = {65,66,77,79};
        ArrayList list = new ArrayList(2);
        list.add(array);
        list.add(new byte[4]);
        combiner = new ByteArrayCombinerStream(list, array.length);
        byte[] resArray = new byte[array.length];
        assertEquals(array.length,
                     combiner.read(resArray, 0, resArray.length));
        assertTrue(combiner.read() == -1);
    }

View Full Code Here


    public void testCombineOneArray()
            throws IOException {
        ArrayList list = new ArrayList(1);
        list.add(defaultArray);
        combiner = new ByteArrayCombinerStream(list, defaultArray.length);
        byte[] resArray = new byte[defaultArray.length];
        assertEquals(defaultArray.length,
                     combiner.read(resArray,0, resArray.length));
        assertTrue(combiner.read() == -1);
        assertTrue(Arrays.equals(defaultArray, resArray));

View Full Code Here

        int offset = 0;
        for (int i=0; i < arrays; i++) {
            System.arraycopy(array, 0, targetArray, offset, array.length);
            offset += array.length;
        }
        combiner = new ByteArrayCombinerStream(list, length);
        byte[] resArray = new byte[(int)length];
        assertEquals(length, combiner.read(resArray, 0, resArray.length));
        assertTrue(combiner.read() == -1);
        assertTrue(combiner.read() == -1);
        assertTrue(Arrays.equals(targetArray, resArray));

View Full Code Here

        list.add(defaultArray);
        byte[] targetArray = new byte[length];
        System.arraycopy(defaultArray, 0,
                         targetArray, 0, length);
        byte[] resArray = new byte[length];
        combiner = new ByteArrayCombinerStream(list, length);
        assertEquals(length, combiner.read(resArray, 0, length));
        assertTrue(combiner.read() == -1);
        assertTrue(Arrays.equals(targetArray, resArray));
    }

View Full Code Here

                         targetArray, 0, defaultArray.length);
        System.arraycopy(defaultArray, 0,
                         targetArray, defaultArray.length,
                         length - defaultArray.length);
        byte[] resArray = new byte[length];
        combiner = new ByteArrayCombinerStream(list, length);
        assertEquals(length, combiner.read(resArray, 0, length));
        assertTrue(combiner.read() == -1);
        assertTrue(Arrays.equals(targetArray, resArray));
    }

View Full Code Here

     */
    public void testTooLittleDataNoCombine() {
        ArrayList list = new ArrayList(1);
        list.add(new byte[5]);
        try {
            combiner = new ByteArrayCombinerStream(list, 10);
            fail("An IllegalArgumentException singalling too little data " +
                    "should have been thrown");
        } catch (IllegalArgumentException iae) {
            // This should happen, continue.
        }

View Full Code Here

0 1 2 3

TOP

Related Classes of org.apache.derby.client.am.ByteArrayCombinerStream

org.apache.derbyTesting.functionTests.tests.derbynet.ByteArrayCombinerStreamTest

java.util.ArrayList

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.