1/*
2 * Copyright (C) 2013 DroidDriver committers
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 io.appium.droiddriver.uiautomation;
18
19import android.annotation.TargetApi;
20import android.app.Instrumentation;
21import android.app.UiAutomation;
22import android.view.accessibility.AccessibilityNodeInfo;
23
24import io.appium.droiddriver.base.DroidDriverContext;
25import io.appium.droiddriver.exceptions.UnrecoverableException;
26
27@TargetApi(18)
28public class UiAutomationContext extends
29    DroidDriverContext<AccessibilityNodeInfo, UiAutomationElement> {
30  private final UiAutomation uiAutomation;
31
32  public UiAutomationContext(Instrumentation instrumentation, UiAutomationDriver driver) {
33    super(instrumentation, driver);
34    this.uiAutomation = instrumentation.getUiAutomation();
35  }
36
37  @Override
38  public UiAutomationDriver getDriver() {
39    return (UiAutomationDriver) super.getDriver();
40  }
41
42  public interface UiAutomationCallable<T> {
43    T call(UiAutomation uiAutomation);
44  }
45
46  /**
47   * Wraps calls to UiAutomation API. Currently supports fail-fast if
48   * UiAutomation throws IllegalStateException, which occurs when the connection
49   * to UiAutomation service is lost.
50   */
51  public <T> T callUiAutomation(UiAutomationCallable<T> uiAutomationCallable) {
52    try {
53      return uiAutomationCallable.call(uiAutomation);
54    } catch (IllegalStateException e) {
55      throw new UnrecoverableException(e);
56    }
57  }
58}
59