Examples of javax.imageio.plugins.jpeg.JPEGHuffmanTable

javax.imageio.plugins.jpeg.JPEGHuffmanTable
A class encapsulating a single JPEG Huffman table. Fields are provided for the "standard" tables taken from Annex K of the JPEG specification. These are the tables used as defaults.
For more information about the operation of the standard JPEG plug-in, see the JPEG metadata format specification and usage notes

        JPEGQTable[] result = {qtable_luma, qtable_chroma};
        return result;
    }


    private JPEGHuffmanTable[] createACHuffmanTables() {
        JPEGHuffmanTable acChm = new JPEGHuffmanTable(RFC2035.chm_ac_codelens, RFC2035.chm_ac_symbols);
        JPEGHuffmanTable acLum = new JPEGHuffmanTable(RFC2035.lum_ac_codelens, RFC2035.lum_ac_symbols);
        JPEGHuffmanTable[] result = {acLum, acChm};
        return result;


    }

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        return result;


    }


    private JPEGHuffmanTable[] createDCHuffmanTables() {
        JPEGHuffmanTable dcChm = new JPEGHuffmanTable(RFC2035.chm_dc_codelens, RFC2035.chm_dc_symbols);
        JPEGHuffmanTable dcLum = new JPEGHuffmanTable(RFC2035.lum_dc_codelens, RFC2035.lum_dc_symbols);
        JPEGHuffmanTable[] result = {dcLum, dcChm};
        return result;
    }

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    return result;
  }
  
  private JPEGHuffmanTable[] createACHuffmanTables()
  {
    JPEGHuffmanTable acChm = new JPEGHuffmanTable(RFC2035.chm_ac_codelens, RFC2035.chm_ac_symbols);
    JPEGHuffmanTable acLum = new JPEGHuffmanTable(RFC2035.lum_ac_codelens, RFC2035.lum_ac_symbols);
    JPEGHuffmanTable[] result = {acLum, acChm};
    return result;
  }

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    return result;
  }
  
  private JPEGHuffmanTable[] createDCHuffmanTables()
  {
    JPEGHuffmanTable dcChm = new JPEGHuffmanTable(RFC2035.chm_dc_codelens, RFC2035.chm_dc_symbols);
    JPEGHuffmanTable dcLum = new JPEGHuffmanTable(RFC2035.lum_dc_codelens, RFC2035.lum_dc_symbols);
    JPEGHuffmanTable[] result = {dcLum, dcChm};
    return result;
  }

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 */
public class TestJPEGHuffmanTable implements Testlet
{
  public void test(TestHarness h)
  {
    JPEGHuffmanTable t = null;
    boolean constructionFailed = false;


    // Some valid data for construction testing.
    short[] ACChrominanceLengths =
      {
        0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77
      };


    short[] ACChrominanceValues =
      {
        0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, 0x31, 0x06,
        0x12, 0x41, 0x51, 0x07, 0x61, 0x71, 0x13, 0x22, 0x32, 0x81,
        0x08, 0x14, 0x42, 0x91, 0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33,
        0x52, 0xf0, 0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
        0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26, 0x27, 0x28,
        0x29, 0x2a, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x43, 0x44,
        0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56,
        0x57, 0x58, 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
        0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a,
        0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x92,
        0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3,
        0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
        0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
        0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6,
        0xd7, 0xd8, 0xd9, 0xda, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
        0xe8, 0xe9, 0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
        0xf9, 0xfa
      };


    short[] ACLuminanceLengths =
      {
        0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d
      };


    short[] ACLuminanceValues =
      {
        0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31,
        0x41, 0x06, 0x13, 0x51, 0x61, 0x07, 0x22, 0x71, 0x14, 0x32,
        0x81, 0x91, 0xa1, 0x08, 0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52,
        0xd1, 0xf0, 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
        0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a,
        0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x43, 0x44, 0x45,
        0x46, 0x47, 0x48, 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57,
        0x58, 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
        0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x83,
        0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94,
        0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
        0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
        0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
        0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8,
        0xd9, 0xda, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8,
        0xe9, 0xea, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
        0xf9, 0xfa
      };


    short[] DCChrominanceLengths =
      {
        0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0
      };


    short[] DCChrominanceValues =
      {
        0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
      };


    short[] DCLuminanceLengths =
      {
        0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0
      };


    short[] DCLuminanceValues =
      {
        0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
      };


    // Test that it is impossible to construct an invalid Huffman table.
    // Both arguments are null.
    try
      {
        t = new JPEGHuffmanTable(null, null);
      }
    catch (IllegalArgumentException e)
      {
        constructionFailed = true;
      }
    h.check(constructionFailed);


    // values argument is null.
    constructionFailed = false;
    try
      {
        t = new JPEGHuffmanTable(ACLuminanceLengths, null);
      }
    catch (IllegalArgumentException e)
      {
        constructionFailed = true;
      }
    h.check(constructionFailed);


    // lengths argument is null.
    constructionFailed = false;
    try
      {
        t = new JPEGHuffmanTable(null, ACLuminanceValues);
      }
    catch (IllegalArgumentException e)
      {
        constructionFailed = true;
      }
    h.check(constructionFailed);


    // lengths argument has length > 16.
    short[] boguslengths = { 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1,
                             0x7d, 5 };


    constructionFailed = false;
    try
      {
        t = new JPEGHuffmanTable(boguslengths, ACLuminanceValues);
      }
    catch (IllegalArgumentException e)
      {
        constructionFailed = true;
      }
    h.check(constructionFailed);


    // values argument has length > 256.
    short[] bogusvalues = new short[257];
    System.arraycopy(ACLuminanceValues, 0, bogusvalues, 0, 128);
    System.arraycopy(ACLuminanceValues, 0, bogusvalues, 128, 128);
    bogusvalues[256] = 0x4a;


    constructionFailed = false;
    try
      {
        t = new JPEGHuffmanTable(ACLuminanceLengths, bogusvalues);
      }
    catch (IllegalArgumentException e)
      {
        constructionFailed = true;
      }
    h.check(constructionFailed);


    // check bogus length value
    ACLuminanceLengths[3] = 16;
    constructionFailed = false;
    try
      {
        t = new JPEGHuffmanTable(ACLuminanceLengths, ACLuminanceValues);
      }
    catch (IllegalArgumentException e)
      {
        constructionFailed = true;
      }
    h.check(constructionFailed);
    // restore original value
    ACLuminanceLengths[3] = 3;


    // check bogus length total
    ACLuminanceLengths[9] = 6;
    constructionFailed = false;
    try
      {
        t = new JPEGHuffmanTable(ACLuminanceLengths, ACLuminanceValues);
      }
    catch (IllegalArgumentException e)
      {
        constructionFailed = true;
      }
    h.check(constructionFailed);
    // restore original value
    ACLuminanceLengths[9] = 5;


    // check bogus number of values
    short[] valueslessone = new short[ACLuminanceValues.length - 1];
    System.arraycopy(ACLuminanceValues, 0, valueslessone, 0,
                     ACLuminanceValues.length - 1);
    constructionFailed = false;
    try
      {
        t = new JPEGHuffmanTable(ACLuminanceLengths, valueslessone);
      }
    catch (IllegalArgumentException e)
      {
        constructionFailed = true;
      }

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                for (int j = 0; j < tables.size(); j++) {
                    if (htables[j].tableID == i) {
                        if (retval[i] != null) {
                            throw new IIOException("Metadata has duplicate Htables!");
                        }
                        retval[i] = new JPEGHuffmanTable(htables[j].numCodes,
                                                         htables[j].values);
                    }
                }
            }
        }

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        IIOMetadataNode getNativeNode() {
            IIOMetadataNode node = new IIOMetadataNode("dhtable");
            node.setAttribute("class", Integer.toString(tableClass));
            node.setAttribute("htableId", Integer.toString(tableID));


            node.setUserObject(new JPEGHuffmanTable(numCodes, values));


            return node;
        }

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            System.out.println("Huffman Table");
            System.out.println("table class: "
                               + ((tableClass == 0) ? "DC":"AC"));
            System.out.println("table id: " + Integer.toString(tableID));


            (new JPEGHuffmanTable(numCodes, values)).toString();
            /*
              System.out.print("Lengths:");
              for (int i=0; i<16; i++) {
              System.out.print(" " + Integer.toString(numCodes[i]));
              }

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                for (int j = 0; j < tables.size(); j++) {
                    if (htables[j].tableID == i) {
                        if (retval[i] != null) {
                            throw new IIOException("Metadata has duplicate Htables!");
                        }
                        retval[i] = new JPEGHuffmanTable(htables[j].numCodes, 
                                                         htables[j].values);
                    }
                }
            }
        }

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                }
                tableClass = getAttributeValue(node, attrs, "class", 0, 1, true);
                tableID = getAttributeValue(node, attrs, "htableId", 0, 3, true);
                if (node instanceof IIOMetadataNode) {
                    IIOMetadataNode ourNode = (IIOMetadataNode) node;
                    JPEGHuffmanTable table = 
                        (JPEGHuffmanTable) ourNode.getUserObject();
                    if (table == null) {
                        throw new IIOInvalidTreeException
                            ("dhtable node must have user object", node);
                    }
                    numCodes = table.getLengths();
                    values = table.getValues();
                } else {
                    throw new IIOInvalidTreeException
                        ("dhtable node must have user object", node);
                }
            } else {

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