/* * 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.gif; import java.util.Arrays;import javax.imageio.ImageTypeSpecifier;import javax.imageio.metadata.IIOMetadataFormat;import javax.imageio.metadata.IIOMetadataFormatImpl; public class GIFStreamMetadataFormat extends IIOMetadataFormatImpl {     private static IIOMetadataFormat instance = null;     private GIFStreamMetadataFormat() {        super(GIFStreamMetadata.nativeMetadataFormatName,              CHILD_POLICY_SOME);         // root -> Version        addElement("Version", GIFStreamMetadata.nativeMetadataFormatName,                   CHILD_POLICY_EMPTY);        addAttribute("Version", "value",                     DATATYPE_STRING, true, null,                     Arrays.asList(GIFStreamMetadata.versionStrings));         // root -> LogicalScreenDescriptor        addElement("LogicalScreenDescriptor",                   GIFStreamMetadata.nativeMetadataFormatName,                   CHILD_POLICY_EMPTY);        addAttribute("LogicalScreenDescriptor", "logicalScreenWidth",                     DATATYPE_INTEGER, true, null,                     "1", "65535", true, true);        addAttribute("LogicalScreenDescriptor", "logicalScreenHeight",                     DATATYPE_INTEGER, true, null,                     "1", "65535", true, true);        addAttribute("LogicalScreenDescriptor", "colorResolution",                     DATATYPE_INTEGER, true, null,                     "1", "8", true, true);        addAttribute("LogicalScreenDescriptor", "pixelAspectRatio",                     DATATYPE_INTEGER, true, null,                     "0", "255", true, true);         // root -> GlobalColorTable        addElement("GlobalColorTable",                   GIFStreamMetadata.nativeMetadataFormatName,                   2, 256);        addAttribute("GlobalColorTable", "sizeOfGlobalColorTable",                     DATATYPE_INTEGER, true, null,                     Arrays.asList(GIFStreamMetadata.colorTableSizes));        addAttribute("GlobalColorTable", "backgroundColorIndex",                     DATATYPE_INTEGER, true, null,                     "0", "255", true, true);        addBooleanAttribute("GlobalColorTable", "sortFlag",                            false, false);         // root -> GlobalColorTable -> ColorTableEntry        addElement("ColorTableEntry", "GlobalColorTable",                   CHILD_POLICY_EMPTY);        addAttribute("ColorTableEntry", "index",                     DATATYPE_INTEGER, true, null,                     "0", "255", true, true);        addAttribute("ColorTableEntry", "red",                     DATATYPE_INTEGER, true, null,                     "0", "255", true, true);        addAttribute("ColorTableEntry", "green",                     DATATYPE_INTEGER, true, null,                     "0", "255", true, true);        addAttribute("ColorTableEntry", "blue",                     DATATYPE_INTEGER, true, null,                     "0", "255", true, true);    }     public boolean canNodeAppear(String elementName,                                 ImageTypeSpecifier imageType) {        return true;    }     public static synchronized IIOMetadataFormat getInstance() {        if (instance == null) {            instance = new GIFStreamMetadataFormat();        }        return instance;    }}