1/*
2 * Copyright (c) 2005, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package javax.imageio.plugins.tiff;
27
28import java.util.ArrayList;
29import java.util.List;
30
31/**
32 * A class representing the tags found in an Exif Interoperability IFD.
33 *
34 * @since 9
35 * @see   ExifTIFFTagSet
36 */
37public final class ExifInteroperabilityTagSet extends TIFFTagSet {
38    /**
39     * A tag indicating the identification of the Interoperability rule
40     * (type ASCII).
41     *
42     * @see #INTEROPERABILITY_INDEX_R98
43     * @see #INTEROPERABILITY_INDEX_THM
44     */
45    public static final int TAG_INTEROPERABILITY_INDEX = 1;
46
47    /**
48     * A value to be used with the "InteroperabilityIndex" tag. Indicates
49     * a file conforming to the R98 file specification of Recommended Exif
50     * Interoperability Rules (ExifR98) or to the DCF basic file stipulated
51     * by the Design Rule for Camera File System (type ASCII).
52     *
53     * @see #TAG_INTEROPERABILITY_INDEX
54     */
55    public static final String INTEROPERABILITY_INDEX_R98 = "R98";
56
57    /**
58     * A value to be used with the "InteroperabilityIndex" tag. Indicates
59     * a file conforming to the DCF thumbnail file stipulated by the Design
60     * rule for Camera File System (type ASCII).
61     *
62     * @see #TAG_INTEROPERABILITY_INDEX
63     */
64    public static final String INTEROPERABILITY_INDEX_THM = "THM";
65
66    private static ExifInteroperabilityTagSet theInstance = null;
67
68    static class InteroperabilityIndex extends TIFFTag {
69
70        public InteroperabilityIndex() {
71            super("InteroperabilityIndex",
72                  TAG_INTEROPERABILITY_INDEX,
73                  1 << TIFFTag.TIFF_ASCII);
74        }
75    }
76
77    private static List<TIFFTag> tags;
78
79    private static void initTags() {
80        tags = new ArrayList<TIFFTag>(42);
81
82        tags.add(new ExifInteroperabilityTagSet.InteroperabilityIndex());
83    }
84
85    private ExifInteroperabilityTagSet() {
86        super(tags);
87    }
88
89    /**
90     * Returns the shared instance of
91     * {@code ExifInteroperabilityTagSet}.
92     *
93     * @return the {@code ExifInteroperabilityTagSet} instance.
94     */
95    public synchronized static ExifInteroperabilityTagSet getInstance() {
96        if (theInstance == null) {
97            initTags();
98            theInstance = new ExifInteroperabilityTagSet();
99            tags = null;
100        }
101        return theInstance;
102    }
103}
104