1 files changed, 112 insertions, 0 deletions
diff --git a/android/app/AppComponentFactory.java b/android/app/AppComponentFactory.java
new file mode 100644
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+++ b/android/app/AppComponentFactory.java
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+/*
+ * 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 android.app;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.content.BroadcastReceiver;
+import android.content.ContentProvider;
+import android.content.Intent;
+
+/**
+ * Interface used to control the instantiation of manifest elements.
+ *
+ * @see #instantiateApplication
+ * @see #instantiateActivity
+ * @see #instantiateService
+ * @see #instantiateReceiver
+ * @see #instantiateProvider
+ */
+public class AppComponentFactory {
+
+    /**
+     * Allows application to override the creation of the application object. This can be used to
+     * perform things such as dependency injection or class loader changes to these
+     * classes.
+     *
+     * @param cl        The default classloader to use for instantiation.
+     * @param className The class to be instantiated.
+     */
+    public @NonNull Application instantiateApplication(@NonNull ClassLoader cl,
+            @NonNull String className)
+            throws InstantiationException, IllegalAccessException, ClassNotFoundException {
+        return (Application) cl.loadClass(className).newInstance();
+    }
+
+    /**
+     * Allows application to override the creation of activities. This can be used to
+     * perform things such as dependency injection or class loader changes to these
+     * classes.
+     *
+     * @param cl        The default classloader to use for instantiation.
+     * @param className The class to be instantiated.
+     * @param intent    Intent creating the class.
+     */
+    public @NonNull Activity instantiateActivity(@NonNull ClassLoader cl, @NonNull String className,
+            @Nullable Intent intent)
+            throws InstantiationException, IllegalAccessException, ClassNotFoundException {
+        return (Activity) cl.loadClass(className).newInstance();
+    }
+
+    /**
+     * Allows application to override the creation of receivers. This can be used to
+     * perform things such as dependency injection or class loader changes to these
+     * classes.
+     *
+     * @param cl        The default classloader to use for instantiation.
+     * @param className The class to be instantiated.
+     * @param intent    Intent creating the class.
+     */
+    public @NonNull BroadcastReceiver instantiateReceiver(@NonNull ClassLoader cl,
+            @NonNull String className, @Nullable Intent intent)
+            throws InstantiationException, IllegalAccessException, ClassNotFoundException {
+        return (BroadcastReceiver) cl.loadClass(className).newInstance();
+    }
+
+    /**
+     * Allows application to override the creation of services. This can be used to
+     * perform things such as dependency injection or class loader changes to these
+     * classes.
+     *
+     * @param cl        The default classloader to use for instantiation.
+     * @param className The class to be instantiated.
+     * @param intent    Intent creating the class.
+     */
+    public @NonNull Service instantiateService(@NonNull ClassLoader cl,
+            @NonNull String className, @Nullable Intent intent)
+            throws InstantiationException, IllegalAccessException, ClassNotFoundException {
+        return (Service) cl.loadClass(className).newInstance();
+    }
+
+    /**
+     * Allows application to override the creation of providers. This can be used to
+     * perform things such as dependency injection or class loader changes to these
+     * classes.
+     *
+     * @param cl        The default classloader to use for instantiation.
+     * @param className The class to be instantiated.
+     */
+    public @NonNull ContentProvider instantiateProvider(@NonNull ClassLoader cl,
+            @NonNull String className)
+            throws InstantiationException, IllegalAccessException, ClassNotFoundException {
+        return (ContentProvider) cl.loadClass(className).newInstance();
+    }
+
+    /**
+     * @hide
+     */
+    public static AppComponentFactory DEFAULT = new AppComponentFactory();
+}