src/share/classes/com/sun/imageio/plugins/png/PNGMetadataFormat.java - toolchain/jdk/jdk9_jdk - Git at Google

 /*
  * Copyright (c) 2001, 2004, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle in the LICENSE file that accompanied this code.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */

 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,
                      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;
     }
 }
	/*
	* Copyright (c) 2001, 2004, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	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,
	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;
	}
	}