1/*
2 * Copyright (C) 2011 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.contacts.util;
18
19import android.content.ContentResolver;
20import android.content.ContentUris;
21import android.net.Uri;
22import android.provider.Contacts;
23import android.provider.ContactsContract;
24import android.provider.ContactsContract.RawContacts;
25
26/**
27 * Utility methods for the {@link ContactLoader}.
28 */
29public final class ContactLoaderUtils {
30
31    /** Static helper, not instantiable. */
32    private ContactLoaderUtils() {}
33
34    /**
35     * Transforms the given Uri and returns a Lookup-Uri that represents the contact.
36     * For legacy contacts, a raw-contact lookup is performed. An {@link IllegalArgumentException}
37     * can be thrown if the URI is null or the authority is not recognized.
38     *
39     * Do not call from the UI thread.
40     */
41    @SuppressWarnings("deprecation")
42    public static Uri ensureIsContactUri(final ContentResolver resolver, final Uri uri)
43            throws IllegalArgumentException {
44        if (uri == null) throw new IllegalArgumentException("uri must not be null");
45
46        final String authority = uri.getAuthority();
47
48        // Current Style Uri?
49        if (ContactsContract.AUTHORITY.equals(authority)) {
50            final String type = resolver.getType(uri);
51            // Contact-Uri? Good, return it
52            if (ContactsContract.Contacts.CONTENT_ITEM_TYPE.equals(type)) {
53                return uri;
54            }
55
56            // RawContact-Uri? Transform it to ContactUri
57            if (RawContacts.CONTENT_ITEM_TYPE.equals(type)) {
58                final long rawContactId = ContentUris.parseId(uri);
59                return RawContacts.getContactLookupUri(resolver,
60                        ContentUris.withAppendedId(RawContacts.CONTENT_URI, rawContactId));
61            }
62
63            // Anything else? We don't know what this is
64            throw new IllegalArgumentException("uri format is unknown");
65        }
66
67        // Legacy Style? Convert to RawContact
68        final String OBSOLETE_AUTHORITY = Contacts.AUTHORITY;
69        if (OBSOLETE_AUTHORITY.equals(authority)) {
70            // Legacy Format. Convert to RawContact-Uri and then lookup the contact
71            final long rawContactId = ContentUris.parseId(uri);
72            return RawContacts.getContactLookupUri(resolver,
73                    ContentUris.withAppendedId(RawContacts.CONTENT_URI, rawContactId));
74        }
75
76        throw new IllegalArgumentException("uri authority is unknown");
77    }
78}
79