93 lines
3.3 KiB
Java
93 lines
3.3 KiB
Java
/*
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* Copyright (C) 2019 The Dagger Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package dagger.hilt.android.internal.managers;
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import android.app.Activity;
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import android.app.Application;
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import androidx.activity.ComponentActivity;
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import dagger.hilt.EntryPoint;
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import dagger.hilt.EntryPoints;
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import dagger.hilt.InstallIn;
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import dagger.hilt.android.components.ActivityRetainedComponent;
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import dagger.hilt.android.internal.builders.ActivityComponentBuilder;
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import dagger.hilt.internal.GeneratedComponentManager;
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/**
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* Do not use except in Hilt generated code!
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*
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* <p>A manager for the creation of components that live in the Activity.
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*
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* <p>Note: This class is not typed since its type in generated code is always <?> or <Object>. This
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* is mainly due to the fact that we don't know the components at the time of generation, and
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* because even the injector interface type is not a valid type if we have a hilt base class.
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*
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*/
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public class ActivityComponentManager implements GeneratedComponentManager<Object> {
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/** Entrypoint for {@link ActivityComponentBuilder}. */
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@EntryPoint
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@InstallIn(ActivityRetainedComponent.class)
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public interface ActivityComponentBuilderEntryPoint {
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ActivityComponentBuilder activityComponentBuilder();
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}
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private volatile Object component;
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private final Object componentLock = new Object();
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protected final Activity activity;
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private final GeneratedComponentManager<ActivityRetainedComponent>
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activityRetainedComponentManager;
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public ActivityComponentManager(Activity activity) {
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this.activity = activity;
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this.activityRetainedComponentManager =
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new ActivityRetainedComponentManager((ComponentActivity) activity);
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}
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@Override
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public Object generatedComponent() {
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if (component == null) {
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synchronized (componentLock) {
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if (component == null) {
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component = createComponent();
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}
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}
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}
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return component;
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}
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protected Object createComponent() {
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if (!(activity.getApplication() instanceof GeneratedComponentManager)) {
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if (Application.class.equals(activity.getApplication().getClass())) {
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throw new IllegalStateException(
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"Hilt Activity must be attached to an @HiltAndroidApp Application. "
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+ "Did you forget to specify your Application's class name in your manifest's "
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+ "<application />'s android:name attribute?");
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}
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throw new IllegalStateException(
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"Hilt Activity must be attached to an @AndroidEntryPoint Application. Found: "
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+ activity.getApplication().getClass());
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}
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return EntryPoints.get(
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activityRetainedComponentManager, ActivityComponentBuilderEntryPoint.class)
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.activityComponentBuilder()
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.activity(activity)
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.build();
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}
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}
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