/*

 * Copyright (c) 2005, 2015, 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

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 */

package javax.imageio.plugins.tiff;

import java.util.ArrayList;

import java.util.List;

/**

 * A class representing the tags found in an Exif Interoperability IFD.

 *

 * @since 1.9

 * @see   ExifTIFFTagSet

 */

public class ExifInteroperabilityTagSet extends TIFFTagSet {

    /**

     * A tag indicating the identification of the Interoperability rule

     * (type ASCII).

     *

     * @see #INTEROPERABILITY_INDEX_R98

     * @see #INTEROPERABILITY_INDEX_THM

     */

    public static final int TAG_INTEROPERABILITY_INDEX = 1;

    /**

     * A value to be used with the "InteroperabilityIndex" tag. Indicates

     * a file conforming to the R98 file specification of Recommended Exif

     * Interoperability Rules (ExifR98) or to the DCF basic file stipulated

     * by the Design Rule for Camera File System (type ASCII).

     *

     * @see #TAG_INTEROPERABILITY_INDEX

     */

    public static final String INTEROPERABILITY_INDEX_R98 = "R98";

    /**

     * A value to be used with the "InteroperabilityIndex" tag. Indicates

     * a file conforming to the DCF thumbnail file stipulated by the Design

     * rule for Camera File System (type ASCII).

     *

     * @see #TAG_INTEROPERABILITY_INDEX

     */

    public static final String INTEROPERABILITY_INDEX_THM = "THM";

    private static ExifInteroperabilityTagSet theInstance = null;

    static class InteroperabilityIndex extends TIFFTag {

        public InteroperabilityIndex() {

            super("InteroperabilityIndex",

                  TAG_INTEROPERABILITY_INDEX,

                  1 << TIFFTag.TIFF_ASCII);

        }

    }

    private static List<TIFFTag> tags;

    private static void initTags() {

        tags = new ArrayList<TIFFTag>(42);

        tags.add(new ExifInteroperabilityTagSet.InteroperabilityIndex());

    }

    private ExifInteroperabilityTagSet() {

        super(tags);

    }

    /**

     * Returns the shared instance of

     * <code>ExifInteroperabilityTagSet</code>.

     *

     * @return the <code>ExifInteroperabilityTagSet</code> instance.

     */

    public synchronized static ExifInteroperabilityTagSet getInstance() {

        if (theInstance == null) {

            initTags();

            theInstance = new ExifInteroperabilityTagSet();

            tags = null;

        }

        return theInstance;

    }

}