1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
5 * in compliance with the License. You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software distributed under the License
10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
11 * or implied. See the License for the specific language governing permissions and limitations under
12 * the License.
13 */
14
15package com.android.contacts.common.extensions;
16
17import android.content.Context;
18import android.support.annotation.NonNull;
19import android.support.annotation.VisibleForTesting;
20import com.android.dialer.common.Assert;
21
22/** Accessor for the phone directory extender singleton. */
23public final class PhoneDirectoryExtenderAccessor {
24
25  private static PhoneDirectoryExtender instance;
26
27  private PhoneDirectoryExtenderAccessor() {}
28
29  @VisibleForTesting
30  public static void setForTesting(PhoneDirectoryExtender extender) {
31    instance = extender;
32  }
33
34  @NonNull
35  public static PhoneDirectoryExtender get(@NonNull Context context) {
36    Assert.isNotNull(context);
37    if (instance != null) {
38      return instance;
39    }
40
41    Context application = context.getApplicationContext();
42    if (application instanceof PhoneDirectoryExtenderFactory) {
43      instance = ((PhoneDirectoryExtenderFactory) application).newPhoneDirectoryExtender();
44    }
45
46    if (instance == null) {
47      instance = new PhoneDirectoryExtenderStub();
48    }
49    return instance;
50  }
51}
52