/*

 * 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;

    }

}