pngmetadataformat.java

java1.6众多例子参考

                     Arrays.asList(PNGMetadata.unitSpecifierNames));

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

        // root -> sBIT -> sBIT_Grayscale
        addElement("sBIT_Grayscale", "sBIT",
                   CHILD_POLICY_EMPTY);

        addAttribute("sBIT_Grayscale", "gray",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_255, true, true);

        // root -> sBIT -> sBIT_GrayAlpha
        addElement("sBIT_GrayAlpha", "sBIT",
                   CHILD_POLICY_EMPTY);

        addAttribute("sBIT_GrayAlpha", "gray",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_255, true, true);

        addAttribute("sBIT_GrayAlpha", "alpha",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_255, true, true);

        // root -> sBIT -> sBIT_RGB
        addElement("sBIT_RGB", "sBIT",
                   CHILD_POLICY_EMPTY);

        addAttribute("sBIT_RGB", "red",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_255, true, true);

        addAttribute("sBIT_RGB", "green",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_255, true, true);

        addAttribute("sBIT_RGB", "blue",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_255, true, true);

        // root -> sBIT -> sBIT_RGBAlpha
        addElement("sBIT_RGBAlpha", "sBIT",
                   CHILD_POLICY_EMPTY);

        addAttribute("sBIT_RGBAlpha", "red",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_255, true, true);

        addAttribute("sBIT_RGBAlpha", "green",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_255, true, true);

        addAttribute("sBIT_RGBAlpha", "blue",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_255, true, true);

        addAttribute("sBIT_RGBAlpha", "alpha",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_255, true, true);

        // root -> sBIT -> sBIT_Palette
        addElement("sBIT_Palette", "sBIT",
                   CHILD_POLICY_EMPTY);

        addAttribute("sBIT_Palette", "red",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_255, true, true);

        addAttribute("sBIT_Palette", "green",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_255, true, true);

        addAttribute("sBIT_Palette", "blue",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_255, true, true);

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

        // root -> sPLT -> sPLTEntry
        addElement("sPLTEntry", "sPLT",
                   CHILD_POLICY_EMPTY);

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

        addAttribute("sPLTEntry", "red",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_255, true, true);

        addAttribute("sPLTEntry", "green",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_255, true, true);

        addAttribute("sPLTEntry", "blue",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_255, true, true);

        addAttribute("sPLTEntry", "alpha",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_255, true, true);

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

        addAttribute("sRGB", "renderingIntent",
                     DATATYPE_STRING, true, null,
                     Arrays.asList(PNGMetadata.renderingIntentNames));

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

        // root -> tEXt -> tEXtEntry
        addElement("tEXtEntry", "tEXt",
                   CHILD_POLICY_EMPTY);

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

        addAttribute("tEXtEntry", "value",
                     DATATYPE_STRING, true, null);

        // root -> tIME
        addElement("tIME", PNGMetadata.nativeMetadataFormatName,
                   CHILD_POLICY_EMPTY);
        
        addAttribute("tIME", "year",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_MAX_16, true, true);

        addAttribute("tIME", "month",
                     DATATYPE_INTEGER, true, null,
                     VALUE_1, VALUE_12, true, true);

        addAttribute("tIME", "day",
                     DATATYPE_INTEGER, true, null,
                     VALUE_1, VALUE_31, true, true);

        addAttribute("tIME", "hour",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_23, true, true);

        addAttribute("tIME", "minute",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_59, true, true);

        addAttribute("tIME", "second",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_60, true, true);

        // root -> tRNS
        addElement("tRNS", PNGMetadata.nativeMetadataFormatName,
                   CHILD_POLICY_CHOICE);
        
        // root -> tRNS -> tRNS_Grayscale
        addElement("tRNS_Grayscale", "tRNS",
                   CHILD_POLICY_EMPTY);

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

        // root -> tRNS -> tRNS_RGB
        addElement("tRNS_RGB", "tRNS",
                   CHILD_POLICY_EMPTY);

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

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

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

        // root -> tRNS -> tRNS_Palette
        addElement("tRNS_Palette", "tRNS",
                   CHILD_POLICY_EMPTY);

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

        addAttribute("tRNS_Palette", "alpha",
                     DATATYPE_INTEGER, true, null,
                     VALUE_0, VALUE_255, true, true);

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

        // root -> zTXt -> zTXtEntry
        addElement("zTXtEntry", "zTXt",
                   CHILD_POLICY_EMPTY);

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

        addAttribute("zTXtEntry", "compressionMethod",
                     DATATYPE_STRING, true, null,
                     Arrays.asList(PNGMetadata.zTXt_compressionMethodNames));

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

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

        // root -> UnknownChunks -> UnknownChunk
        addElement("UnknownChunk", "UnknownChunks",
                   CHILD_POLICY_EMPTY);

        addAttribute("UnknownChunk", "type",
                     DATATYPE_STRING, true, null);

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

    public boolean canNodeAppear(String elementName,
                                 ImageTypeSpecifier imageType) {
        return true;
    }
    
    public static synchronized IIOMetadataFormat getInstance() {
        if (instance == null) {
            instance = new PNGMetadataFormat();
        }
        return instance;
    }
}