| /* |
| * Copyright (C) 2014 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.internal.codegen.binding; |
| |
| import static dagger.internal.codegen.base.MoreAnnotationMirrors.unwrapOptionalEquivalence; |
| import static dagger.internal.codegen.binding.ContributionBinding.FactoryCreationStrategy.CLASS_CONSTRUCTOR; |
| import static dagger.internal.codegen.binding.ContributionBinding.FactoryCreationStrategy.DELEGATE; |
| import static dagger.internal.codegen.binding.ContributionBinding.FactoryCreationStrategy.SINGLETON_INSTANCE; |
| import static java.util.Arrays.asList; |
| |
| import com.google.auto.common.MoreElements; |
| import com.google.common.base.Equivalence; |
| import com.google.common.base.Preconditions; |
| import com.google.errorprone.annotations.CanIgnoreReturnValue; |
| import com.google.errorprone.annotations.CheckReturnValue; |
| import dagger.internal.codegen.base.ContributionType; |
| import dagger.internal.codegen.base.ContributionType.HasContributionType; |
| import dagger.internal.codegen.base.MapType; |
| import dagger.internal.codegen.base.SetType; |
| import dagger.model.BindingKind; |
| import dagger.model.DependencyRequest; |
| import dagger.model.Key; |
| import java.util.Optional; |
| import javax.lang.model.element.AnnotationMirror; |
| import javax.lang.model.element.Element; |
| import javax.lang.model.element.ExecutableElement; |
| import javax.lang.model.element.TypeElement; |
| import javax.lang.model.type.DeclaredType; |
| import javax.lang.model.type.TypeMirror; |
| |
| /** |
| * An abstract class for a value object representing the mechanism by which a {@link Key} can be |
| * contributed to a dependency graph. |
| */ |
| public abstract class ContributionBinding extends Binding implements HasContributionType { |
| |
| /** Returns the type that specifies this' nullability, absent if not nullable. */ |
| public abstract Optional<DeclaredType> nullableType(); |
| |
| public abstract Optional<Equivalence.Wrapper<AnnotationMirror>> wrappedMapKeyAnnotation(); |
| |
| public final Optional<AnnotationMirror> mapKeyAnnotation() { |
| return unwrapOptionalEquivalence(wrappedMapKeyAnnotation()); |
| } |
| |
| /** If {@link #bindingElement()} is a method that returns a primitive type, returns that type. */ |
| public final Optional<TypeMirror> contributedPrimitiveType() { |
| return bindingElement() |
| .filter(bindingElement -> bindingElement instanceof ExecutableElement) |
| .map(bindingElement -> MoreElements.asExecutable(bindingElement).getReturnType()) |
| .filter(type -> type.getKind().isPrimitive()); |
| } |
| |
| @Override |
| public boolean requiresModuleInstance() { |
| return !isContributingModuleKotlinObject().orElse(false) && super.requiresModuleInstance(); |
| } |
| |
| @Override |
| public final boolean isNullable() { |
| return nullableType().isPresent(); |
| } |
| |
| /** |
| * Returns {@code true} if the contributing module is a Kotlin object. Note that a companion |
| * object is also considered a Kotlin object. |
| */ |
| abstract Optional<Boolean> isContributingModuleKotlinObject(); |
| |
| /** The strategy for getting an instance of a factory for a {@link ContributionBinding}. */ |
| public enum FactoryCreationStrategy { |
| /** The factory class is a single instance. */ |
| SINGLETON_INSTANCE, |
| /** The factory must be created by calling the constructor. */ |
| CLASS_CONSTRUCTOR, |
| /** The factory is simply delegated to another. */ |
| DELEGATE, |
| } |
| |
| /** |
| * Returns the {@link FactoryCreationStrategy} appropriate for a binding. |
| * |
| * <p>Delegate bindings use the {@link FactoryCreationStrategy#DELEGATE} strategy. |
| * |
| * <p>Bindings without dependencies that don't require a module instance use the {@link |
| * FactoryCreationStrategy#SINGLETON_INSTANCE} strategy. |
| * |
| * <p>All other bindings use the {@link FactoryCreationStrategy#CLASS_CONSTRUCTOR} strategy. |
| */ |
| public final FactoryCreationStrategy factoryCreationStrategy() { |
| switch (kind()) { |
| case DELEGATE: |
| return DELEGATE; |
| case PROVISION: |
| return dependencies().isEmpty() && !requiresModuleInstance() |
| ? SINGLETON_INSTANCE |
| : CLASS_CONSTRUCTOR; |
| case INJECTION: |
| case MULTIBOUND_SET: |
| case MULTIBOUND_MAP: |
| return dependencies().isEmpty() ? SINGLETON_INSTANCE : CLASS_CONSTRUCTOR; |
| default: |
| return CLASS_CONSTRUCTOR; |
| } |
| } |
| |
| /** |
| * The {@link TypeMirror type} for the {@code Factory<T>} or {@code Producer<T>} which is created |
| * for this binding. Uses the binding's key, V in the case of {@code Map<K, FrameworkClass<V>>>}, |
| * and E {@code Set<E>} for {@link dagger.multibindings.IntoSet @IntoSet} methods. |
| */ |
| public final TypeMirror contributedType() { |
| switch (contributionType()) { |
| case MAP: |
| return MapType.from(key()).unwrappedFrameworkValueType(); |
| case SET: |
| return SetType.from(key()).elementType(); |
| case SET_VALUES: |
| case UNIQUE: |
| return key().type(); |
| } |
| throw new AssertionError(); |
| } |
| |
| /** |
| * Returns {@link BindingKind#MULTIBOUND_SET} or {@link |
| * BindingKind#MULTIBOUND_MAP} if the key is a set or map. |
| * |
| * @throws IllegalArgumentException if {@code key} is neither a set nor a map |
| */ |
| static BindingKind bindingKindForMultibindingKey(Key key) { |
| if (SetType.isSet(key)) { |
| return BindingKind.MULTIBOUND_SET; |
| } else if (MapType.isMap(key)) { |
| return BindingKind.MULTIBOUND_MAP; |
| } else { |
| throw new IllegalArgumentException(String.format("key is not for a set or map: %s", key)); |
| } |
| } |
| |
| public abstract Builder<?, ?> toBuilder(); |
| |
| /** |
| * Base builder for {@link com.google.auto.value.AutoValue @AutoValue} subclasses of {@link |
| * ContributionBinding}. |
| */ |
| @CanIgnoreReturnValue |
| public abstract static class Builder<C extends ContributionBinding, B extends Builder<C, B>> { |
| public abstract B dependencies(Iterable<DependencyRequest> dependencies); |
| |
| public B dependencies(DependencyRequest... dependencies) { |
| return dependencies(asList(dependencies)); |
| } |
| |
| public abstract B unresolved(C unresolved); |
| |
| public abstract B contributionType(ContributionType contributionType); |
| |
| public abstract B bindingElement(Element bindingElement); |
| |
| abstract B bindingElement(Optional<Element> bindingElement); |
| |
| public final B clearBindingElement() { |
| return bindingElement(Optional.empty()); |
| }; |
| |
| abstract B contributingModule(TypeElement contributingModule); |
| |
| abstract B isContributingModuleKotlinObject(boolean isModuleKotlinObject); |
| |
| public abstract B key(Key key); |
| |
| public abstract B nullableType(Optional<DeclaredType> nullableType); |
| |
| abstract B wrappedMapKeyAnnotation( |
| Optional<Equivalence.Wrapper<AnnotationMirror>> wrappedMapKeyAnnotation); |
| |
| public abstract B kind(BindingKind kind); |
| |
| @CheckReturnValue |
| abstract C autoBuild(); |
| |
| @CheckReturnValue |
| public C build() { |
| C binding = autoBuild(); |
| Preconditions.checkState( |
| binding.contributingModule().isPresent() |
| == binding.isContributingModuleKotlinObject().isPresent(), |
| "The contributionModule and isModuleKotlinObject must both be set together."); |
| return binding; |
| } |
| } |
| } |