The Tor Browser / file comparison
comparison: mobile/android/base/tests/helpers/FrameworkHelper.java
mobile/android/base/tests/helpers/FrameworkHelper.java
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:8f034f889266 |
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| 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/. */ | |
| 4 | |
| 5 package org.mozilla.gecko.tests.helpers; | |
| 6 | |
| 7 import static org.mozilla.gecko.tests.helpers.AssertionHelper.fFail; | |
| 8 | |
| 9 import java.lang.reflect.Field; | |
| 10 | |
| 11 import android.content.Context; | |
| 12 import android.view.View; | |
| 13 | |
| 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 { | |
| 23 | |
| 24 private FrameworkHelper() { /* To disallow instantiation. */ } | |
| 25 | |
| 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 } | |
| 42 | |
| 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 } | |
| 61 | |
| 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 } | |
| 80 | |
| 81 public static Context getViewContext(final View v) { | |
| 82 return (Context) getField(v, "mContext"); | |
| 83 } | |
| 84 | |
| 85 public static void setViewContext(final View v, final Context c) { | |
| 86 setField(v, "mContext", c); | |
| 87 } | |
| 88 } |
