diff options
Diffstat (limited to 'java/com/android/voicemail/impl/scheduling/Tasks.java')
-rw-r--r-- | java/com/android/voicemail/impl/scheduling/Tasks.java | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/java/com/android/voicemail/impl/scheduling/Tasks.java b/java/com/android/voicemail/impl/scheduling/Tasks.java new file mode 100644 index 000000000..76da3d7f6 --- /dev/null +++ b/java/com/android/voicemail/impl/scheduling/Tasks.java @@ -0,0 +1,76 @@ +/* + * Copyright (C) 2017 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License + */ + +package com.android.voicemail.impl.scheduling; + +import android.content.Context; +import android.content.Intent; +import android.os.Bundle; +import android.support.annotation.NonNull; +import com.android.voicemail.impl.VvmLog; + +/** Common operations on {@link Task} */ +final class Tasks { + + private Tasks() {} + + static final String EXTRA_CLASS_NAME = "extra_class_name"; + + /** + * Create a task from a bundle. The bundle is created either with {@link #toBundle(Task)} or + * {@link #createIntent(Context, Class)} from the target {@link Task} + */ + @NonNull + public static Task createTask(Context context, Bundle extras) { + // The extra contains custom parcelables which cannot be unmarshalled by the framework class + // loader. + extras.setClassLoader(context.getClassLoader()); + String className = extras.getString(EXTRA_CLASS_NAME); + VvmLog.i("Task.createTask", "create task:" + className); + if (className == null) { + throw new IllegalArgumentException("EXTRA_CLASS_NAME expected"); + } + try { + Task task = (Task) Class.forName(className).getDeclaredConstructor().newInstance(); + task.onCreate(context, extras); + return task; + } catch (ReflectiveOperationException e) { + throw new IllegalArgumentException(e); + } + } + + /** + * Serializes necessary states to a bundle that can be used to restore the task with {@link + * #createTask(Context, Bundle)} + */ + public static Bundle toBundle(Task task) { + Bundle result = task.toBundle(); + result.putString(EXTRA_CLASS_NAME, task.getClass().getName()); + return result; + } + + /** + * Create an intent that when called with {@link Context#startService(Intent)}, will queue the + * <code>task</code>. Implementations of {@link Task} should use the result of this and fill in + * necessary information. + */ + public static Intent createIntent(Context context, Class<? extends Task> task) { + Intent intent = new Intent(context, TaskReceiver.class); + intent.setPackage(context.getPackageName()); + intent.putExtra(EXTRA_CLASS_NAME, task.getName()); + return intent; + } +} |