pngmetadataformat.java

java1.6众多例子参考

/*
 * @(#)PNGMetadataFormat.java	1.10 05/11/17
 *
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package com.sun.imageio.plugins.png;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.ListResourceBundle;
import javax.imageio.ImageTypeSpecifier;
import javax.imageio.metadata.IIOMetadataFormat;
import javax.imageio.metadata.IIOMetadataFormatImpl;

public class PNGMetadataFormat extends IIOMetadataFormatImpl {

    private static IIOMetadataFormat instance = null;

    private static String VALUE_0 = "0";
    private static String VALUE_1 = "1";
    private static String VALUE_12 = "12";
    private static String VALUE_23 = "23";
    private static String VALUE_31 = "31";
    private static String VALUE_59 = "59";
    private static String VALUE_60 = "60";
    private static String VALUE_255 = "255";
    private static String VALUE_MAX_16 = "65535"; // 2^16 - 1
    private static String VALUE_MAX_32 = "2147483647"; // 2^32 - 1

    private PNGMetadataFormat() {
        super(PNGMetadata.nativeMetadataFormatName,
              CHILD_POLICY_SOME);

        // root -> IHDR
        addElement("IHDR", PNGMetadata.nativeMetadataFormatName,
                   CHILD_POLICY_EMPTY);

        addAttribute("IHDR", "width", 
                     DATATYPE_INTEGER, true, null, 
                     VALUE_1, VALUE_MAX_32, true, true);

        addAttribute("IHDR", "height", 
                     DATATYPE_INTEGER, true, null, 
                     VALUE_1, VALUE_MAX_32, true, true);

        addAttribute("IHDR", "bitDepth", 
                     DATATYPE_INTEGER, true, null,
                     Arrays.asList(PNGMetadata.IHDR_bitDepths));

        String[] colorTypes = {
            "Grayscale", "RGB", "Palette", "GrayAlpha", "RGBAlpha"
        };
        addAttribute("IHDR", "colorType", 
                     DATATYPE_STRING, true, null,
                     Arrays.asList(colorTypes));

        addAttribute("IHDR", "compressionMethod",
                     DATATYPE_STRING, true, null,
                     Arrays.asList(PNGMetadata.IHDR_compressionMethodNames));

        addAttribute("IHDR", "filterMethod",
                     DATATYPE_STRING, true, null,
                     Arrays.asList(PNGMetadata.IHDR_filterMethodNames));

        addAttribute("IHDR", "interlaceMethod",
                     DATATYPE_STRING, true, null,
                     Arrays.asList(PNGMetadata.IHDR_interlaceMethodNames));

        // root -> PLTE
        addElement("PLTE", PNGMetadata.nativeMetadataFormatName,
                   1, 256);
        
        // root -> PLTE -> PLTEEntry
        addElement("PLTEEntry", "PLTE",
                   CHILD_POLICY_EMPTY);

        addAttribute("PLTEEntry", "index",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_255, true, true);
        
        addAttribute("PLTEEntry", "red",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_255, true, true);
        
        addAttribute("PLTEEntry", "green",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_255, true, true);
        
        addAttribute("PLTEEntry", "blue",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_255, true, true);

        // root -> bKGD
        addElement("bKGD", PNGMetadata.nativeMetadataFormatName,
                   CHILD_POLICY_CHOICE);

        // root -> bKGD -> bKGD_Grayscale
        addElement("bKGD_Grayscale", "bKGD",
                   CHILD_POLICY_EMPTY);

        addAttribute("bKGD_Grayscale", "gray",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_MAX_16, true, true);

        // root -> bKGD -> bKGD_RGB
        addElement("bKGD_RGB", "bKGD",
                   CHILD_POLICY_EMPTY);

        addAttribute("bKGD_RGB", "red",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_MAX_16, true, true);

        addAttribute("bKGD_RGB", "green",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_MAX_16, true, true);

        addAttribute("bKGD_RGB", "blue",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_MAX_16, true, true);

        // root -> bKGD -> bKGD_Palette
        addElement("bKGD_Palette", "bKGD",
                   CHILD_POLICY_EMPTY);

        addAttribute("bKGD_Palette", "index",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_255, true, true);

        // root -> cHRM
        addElement("cHRM", PNGMetadata.nativeMetadataFormatName,
                   CHILD_POLICY_EMPTY);

        addAttribute("cHRM", "whitePointX",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_MAX_16, true, true);

        addAttribute("cHRM", "whitePointY",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_MAX_16, true, true);

        addAttribute("cHRM", "redX",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_MAX_16, true, true);

        addAttribute("cHRM", "redY",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_MAX_16, true, true);

        addAttribute("cHRM", "greenX",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_MAX_16, true, true);

        addAttribute("cHRM", "greenY",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_MAX_16, true, true);

        addAttribute("cHRM", "blueX",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_MAX_16, true, true);

        addAttribute("cHRM", "blueY",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_MAX_16, true, true);

        // root -> gAMA
        addElement("gAMA", PNGMetadata.nativeMetadataFormatName,
                   CHILD_POLICY_EMPTY);

        addAttribute("gAMA", "value",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_MAX_32, true, true);

        // root -> hIST
        addElement("hIST", PNGMetadata.nativeMetadataFormatName,
                   1, 256);

        // root -> hISTEntry
        addElement("hISTEntry", "hIST",
                   CHILD_POLICY_EMPTY);

        addAttribute("hISTEntry", "index",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_255, true, true);

        addAttribute("hISTEntry", "value",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_MAX_16, true, true);

        // root -> iCCP
        addElement("iCCP", PNGMetadata.nativeMetadataFormatName,
                   CHILD_POLICY_EMPTY);

        addAttribute("iCCP", "profileName",
                     DATATYPE_STRING, true, null);

        addAttribute("iCCP", "compressionMethod",
                     DATATYPE_STRING, true, null,
                     Arrays.asList(PNGMetadata.iCCP_compressionMethodNames));

        addObjectValue("iCCP", byte.class, 0, Integer.MAX_VALUE);

        // root -> iTXt
        addElement("iTXt", PNGMetadata.nativeMetadataFormatName,
                   1, Integer.MAX_VALUE);

        // root -> iTXt -> iTXtEntry
        addElement("iTXtEntry", "iTXt",
                   CHILD_POLICY_EMPTY);

        addAttribute("iTXtEntry", "keyword",
                     DATATYPE_STRING, true, null);

        addBooleanAttribute("iTXtEntry", "compressionFlag",
                            false, false);

        addAttribute("iTXtEntry", "compressionMethod",
                     DATATYPE_STRING, true, null);

        addAttribute("iTXtEntry", "languageTag",
                     DATATYPE_STRING, true, null);

        addAttribute("iTXtEntry", "translatedKeyword",
                     DATATYPE_STRING, true, null);

        addAttribute("iTXtEntry", "text",
                     DATATYPE_STRING, true, null);

        // root -> pHYS
        addElement("pHYS", PNGMetadata.nativeMetadataFormatName,
                   CHILD_POLICY_EMPTY);

        addAttribute("pHYS", "pixelsPerUnitXAxis",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_MAX_32, true, true);
        addAttribute("pHYS", "pixelsPerUnitYAxis",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_MAX_32, true, true);
        addAttribute("pHYS", "unitSpecifier",
                     DATATYPE_STRING, true, null,