NdefMessageParser.java revision 081de56bfdd18f47025ef7af85b45592db244233 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.apps.tag.message;
18
19import android.nfc.NdefMessage;
20import android.nfc.NdefRecord;
21
22import com.android.apps.tag.record.ImageRecord;
23import com.android.apps.tag.record.MimeRecord;
24import com.android.apps.tag.record.ParsedNdefRecord;
25import com.android.apps.tag.record.SmartPoster;
26import com.android.apps.tag.record.TextRecord;
27import com.android.apps.tag.record.UriRecord;
28
29import java.util.ArrayList;
30import java.util.List;
31
32/**
33 * Utility class for creating {@link ParsedNdefMessage}s.
34 */
35public class NdefMessageParser {
36
37    // Utility class
38    private NdefMessageParser() { }
39
40    /** Parse an NdefMessage */
41    public static ParsedNdefMessage parse(NdefMessage message) {
42        List<ParsedNdefRecord> elements = getRecords(message);
43
44        if (elements.isEmpty()) {
45            return new EmptyMessage();
46        }
47
48        ParsedNdefRecord first = elements.get(0);
49
50        if (elements.size() == 1) {
51            if (first instanceof SmartPoster) {
52                return new SmartPosterMessage((SmartPoster) first, elements);
53            }
54            if (first instanceof TextRecord) {
55                return new TextMessage((TextRecord) first, elements);
56            }
57            if (first instanceof UriRecord) {
58                return new UriMessage((UriRecord) first, elements);
59            }
60        }
61
62        return new UnknownMessage(elements);
63    }
64
65    public static List<ParsedNdefRecord> getRecords(NdefMessage message) {
66        List<ParsedNdefRecord> elements = new ArrayList<ParsedNdefRecord>();
67        for (NdefRecord record : message.getRecords()) {
68            if (UriRecord.isUri(record)) {
69                elements.add(UriRecord.parse(record));
70            } else if (TextRecord.isText(record)) {
71                elements.add(TextRecord.parse(record));
72            } else if (SmartPoster.isPoster(record)) {
73                elements.add(SmartPoster.parse(record));
74            } else if (ImageRecord.isImage(record)) {
75                elements.add(ImageRecord.parse(record));
76            } else if (MimeRecord.isMime(record)) {
77                elements.add(MimeRecord.parse(record));
78            }
79        }
80        return elements;
81    }
82}
83