1 files changed, 73 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..34debaf29
--- /dev/null
+++ b/java/com/android/voicemail/impl/scheduling/Tasks.java
@@ -0,0 +1,73 @@
+/*
+ * 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 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}
+   */
+  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, TaskSchedulerService.class);
+    intent.putExtra(EXTRA_CLASS_NAME, task.getName());
+    return intent;
+  }
+}