unplugged-system/external/dagger2/java/dagger/hilt/android/migration/CustomInject.java

56 lines
2.0 KiB
Java

/*
* Copyright (C) 2021 The Dagger Authors.
*
* 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 dagger.hilt.android.migration;
import java.lang.annotation.ElementType;
import java.lang.annotation.Target;
/**
* When used on a {@link dagger.hilt.android.HiltAndroidApp}-annotated application, this causes the
* application to no longer inject itself in onCreate and instead allows it to be injected at some
* other time.
*
* <p>When using this annotation, you can use {@link CustomInjection#inject} to inject the
* application class. Additionally, this annotation will also cause a method, {@code customInject}
* to be generated in the Hilt base class as well, that behaves the same as
* {@link CustomInjection#inject}. The method is available to users that extend the Hilt base class
* directly and don't use the Gradle plugin.
*
* <p> Example usage:
*
* <pre><code>
* {@literal @}CustomInject
* {@literal @}HiltAndroidApp(Application.class)
* public final class MyApplication extends Hilt_MyApplication {
*
* {@literal @}Inject Foo foo;
*
* {@literal @}Override
* public void onCreate() {
* // Injection would normally happen in this super.onCreate() call, but won't now because this
* // is using CustomInject.
* super.onCreate();
* doSomethingBeforeInjection();
* // This call now injects the fields in the Application, like the foo field above.
* CustomInject.inject(this);
* }
* }
* </code></pre>
*/
@Target(ElementType.TYPE)
public @interface CustomInject {}