117 lines
3.9 KiB
Java
117 lines
3.9 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.content.Context;
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import android.content.ContextWrapper;
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import android.os.Bundle;
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import androidx.fragment.app.Fragment;
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import android.view.LayoutInflater;
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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.ActivityComponent;
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import dagger.hilt.android.internal.builders.FragmentComponentBuilder;
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import dagger.hilt.internal.GeneratedComponentManager;
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import dagger.hilt.internal.Preconditions;
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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 Fragment.
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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 FragmentComponentManager implements GeneratedComponentManager<Object> {
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/** Entrypoint for {@link FragmentComponentBuilder}. */
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@EntryPoint
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@InstallIn(ActivityComponent.class)
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public interface FragmentComponentBuilderEntryPoint {
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FragmentComponentBuilder fragmentComponentBuilder();
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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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private final Fragment fragment;
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public FragmentComponentManager(Fragment fragment) {
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this.fragment = fragment;
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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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private Object createComponent() {
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Preconditions.checkNotNull(
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fragment.getHost(),
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"Hilt Fragments must be attached before creating the component.");
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Preconditions.checkState(
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fragment.getHost() instanceof GeneratedComponentManager,
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"Hilt Fragments must be attached to an @AndroidEntryPoint Activity. Found: %s",
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fragment.getHost().getClass());
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validate(fragment);
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return EntryPoints.get(fragment.getHost(), FragmentComponentBuilderEntryPoint.class)
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.fragmentComponentBuilder()
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.fragment(fragment)
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.build();
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}
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/** Returns the fragments bundle, creating a new one if none exists. */
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public static final void initializeArguments(Fragment fragment) {
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Preconditions.checkNotNull(fragment);
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if (fragment.getArguments() == null) {
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fragment.setArguments(new Bundle());
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}
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}
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public static final Context findActivity(Context context) {
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while (context instanceof ContextWrapper
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&& !(context instanceof Activity)) {
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context = ((ContextWrapper) context).getBaseContext();
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}
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return context;
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}
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public static ContextWrapper createContextWrapper(Context base, Fragment fragment) {
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return new ViewComponentManager.FragmentContextWrapper(base, fragment);
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}
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public static ContextWrapper createContextWrapper(
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LayoutInflater baseInflater, Fragment fragment) {
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return new ViewComponentManager.FragmentContextWrapper(baseInflater, fragment);
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}
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/** Called immediately before component creation to allow validation on the Fragment. */
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protected void validate(Fragment fragment) {
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}
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}
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