Examples of com.drew.imaging.jpeg.JpegSegmentData

com.drew.imaging.jpeg.JpegSegmentData
Holds a collection of Jpeg data segments. This need not necessarily be all segments within the Jpeg. For example, it may be convenient to port about only the non-image segments when analysing (or serializing) metadata.

        TestHelper.assertEqualArrays(segmentBytes2, segmentData.getSegment(segmentMarker, 0));
    }


    public void testRemoveSegment() throws Exception
    {
        JpegSegmentData segmentData = new JpegSegmentData();


        byte segmentMarker = (byte)12;
        byte[] segmentBytes1 = new byte[] { 1,2,3 };
        byte[] segmentBytes2 = new byte[] { 3,2,1 };


        segmentData.addSegment(segmentMarker, segmentBytes1);
        segmentData.addSegment(segmentMarker, segmentBytes2);


        assertEquals(2, segmentData.getSegmentCount(segmentMarker));
        assertTrue(segmentData.containsSegment(segmentMarker));


        TestHelper.assertEqualArrays(segmentBytes1, segmentData.getSegment(segmentMarker, 0));


        segmentData.removeSegment(segmentMarker);


        assertTrue(!segmentData.containsSegment(segmentMarker));
        assertEquals(0, segmentData.getSegmentCount(segmentMarker));
    }

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        assertEquals(0, segmentData.getSegmentCount(segmentMarker));
    }


    public void testToAndFromFile() throws Exception
    {
        JpegSegmentData segmentData = new JpegSegmentData();
        byte segmentMarker = (byte)12;
        byte[] segmentBytes = new byte[] { 1,2,3 };


        segmentData.addSegment(segmentMarker, segmentBytes);
        assertTrue(segmentData.containsSegment(segmentMarker));


        File tempFile = File.createTempFile("JpegSegmentDataTest", "tmp");
        JpegSegmentData.ToFile(tempFile, segmentData);
        assertTrue(tempFile.exists());
        assertTrue(tempFile.length() > 0);
        segmentData = JpegSegmentData.FromFile(tempFile);


        tempFile.delete();
        assertTrue(!tempFile.exists());


        assertNotNull(segmentData);
        assertTrue(segmentData.containsSegment(segmentMarker));
        TestHelper.assertEqualArrays(segmentBytes, segmentData.getSegment(segmentMarker));
    }

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