mobile/android/base/tests/helpers/FrameworkHelper.java@6474c204b198
mobile/android/base/tests/helpers/FrameworkHelper.java
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
1 /* This Source Code Form is subject to the terms of the Mozilla Public
2 * License, v. 2.0. If a copy of the MPL was not distributed with this
3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5 package org.mozilla.gecko.tests.helpers;
7 import static org.mozilla.gecko.tests.helpers.AssertionHelper.fFail;
9 import java.lang.reflect.Field;
11 import android.content.Context;
12 import android.view.View;
14 /**
15 * Provides helper functions for accessing Android framework features
16 *
17 * This class uses reflection to access framework functionalities that are
18 * unavailable through the regular Android API. Using reflection in this
19 * case is okay because it does not touch Gecko classes that go through
20 * ProGuard.
21 */
22 public final class FrameworkHelper {
24 private FrameworkHelper() { /* To disallow instantiation. */ }
26 private static Field getClassField(final Class<?> clazz, final String fieldName)
27 throws NoSuchFieldException {
28 Class<?> cls = clazz;
29 do {
30 try {
31 return cls.getDeclaredField(fieldName);
32 } catch (final NoSuchFieldException e) {
33 cls = cls.getSuperclass();
34 }
35 } while (cls != null);
36 // We tried getDeclaredField before; now try getField instead.
37 // getField behaves differently in that getField traverses the inheritance
38 // list, but it only works on public fields. While getField won't get us
39 // anything new, it makes code cleaner by throwing an exception for us.
40 return clazz.getField(fieldName);
41 }
43 private static Object getField(final Object obj, final String fieldName) {
44 try {
45 final Field field = getClassField(obj.getClass(), fieldName);
46 final boolean accessible = field.isAccessible();
47 field.setAccessible(true);
48 final Object ret = field.get(obj);
49 field.setAccessible(accessible);
50 return ret;
51 } catch (final NoSuchFieldException e) {
52 // We expect a valid field name; if it's not valid,
53 // the caller is doing something wrong and should be fixed.
54 fFail("Argument field should be a valid field name: " + e.toString());
55 } catch (final IllegalAccessException e) {
56 // This should not happen. If it does, setAccessible above is not working.
57 fFail("Field should be accessible: " + e.toString());
58 }
59 throw new IllegalStateException("Should not continue from previous failures");
60 }
62 private static void setField(final Object obj, final String fieldName, final Object value) {
63 try {
64 final Field field = getClassField(obj.getClass(), fieldName);
65 final boolean accessible = field.isAccessible();
66 field.setAccessible(true);
67 field.set(obj, value);
68 field.setAccessible(accessible);
69 return;
70 } catch (final NoSuchFieldException e) {
71 // We expect a valid field name; if it's not valid,
72 // the caller is doing something wrong and should be fixed.
73 fFail("Argument field should be a valid field name: " + e.toString());
74 } catch (final IllegalAccessException e) {
75 // This should not happen. If it does, setAccessible above is not working.
76 fFail("Field should be accessible: " + e.toString());
77 }
78 throw new IllegalStateException("Cannot continue from previous failures");
79 }
81 public static Context getViewContext(final View v) {
82 return (Context) getField(v, "mContext");
83 }
85 public static void setViewContext(final View v, final Context c) {
86 setField(v, "mContext", c);
87 }
88 }
