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/*
* Copyright (C) 2015 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 com.google.common.base.Preconditions.checkArgument;
import static com.google.common.collect.Iterables.getOnlyElement;
import androidx.room.compiler.processing.XTypeElement;
import com.google.auto.value.AutoValue;
import com.google.auto.value.extension.memoized.Memoized;
import com.google.common.collect.ImmutableCollection;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.ImmutableSetMultimap;
import com.google.common.collect.Multimap;
import dagger.internal.codegen.model.Key;
/**
* The collection of bindings that have been resolved for a key. For valid graphs, contains exactly
* one binding.
*
* <p>Separate {@link ResolvedBindings} instances should be used if a {@link
* MembersInjectionBinding} and a {@link ProvisionBinding} for the same key exist in the same
* component. (This will only happen if a type has an {@code @Inject} constructor and members, the
* component has a members injection method, and the type is also requested normally.)
*/
@AutoValue
abstract class ResolvedBindings {
/** The binding key for which the {@link #bindings()} have been resolved. */
abstract Key key();
/**
* The {@link ContributionBinding}s for {@link #key()} indexed by the component that owns the
* binding. Each key in the multimap is a part of the same component ancestry.
*/
abstract ImmutableSetMultimap<XTypeElement, ContributionBinding> allContributionBindings();
/**
* The {@link MembersInjectionBinding}s for {@link #key()} indexed by the component that owns the
* binding. Each key in the map is a part of the same component ancestry.
*/
abstract ImmutableMap<XTypeElement, MembersInjectionBinding> allMembersInjectionBindings();
/** The multibinding declarations for {@link #key()}. */
abstract ImmutableSet<MultibindingDeclaration> multibindingDeclarations();
/** The subcomponent declarations for {@link #key()}. */
abstract ImmutableSet<SubcomponentDeclaration> subcomponentDeclarations();
/** The optional binding declarations for {@link #key()}. */
abstract ImmutableSet<OptionalBindingDeclaration> optionalBindingDeclarations();
// Computing the hash code is an expensive operation.
@Memoized
@Override
public abstract int hashCode();
// Suppresses ErrorProne warning that hashCode was overridden w/o equals
@Override
public abstract boolean equals(Object other);
/** All bindings for {@link #key()}, indexed by the component that owns the binding. */
final ImmutableSetMultimap<XTypeElement, ? extends Binding> allBindings() {
return !allMembersInjectionBindings().isEmpty()
? allMembersInjectionBindings().asMultimap()
: allContributionBindings();
}
/** All bindings for {@link #key()}, regardless of which component owns them. */
final ImmutableCollection<? extends Binding> bindings() {
return allBindings().values();
}
/**
* {@code true} if there are no {@link #bindings()}, {@link #multibindingDeclarations()}, {@link
* #optionalBindingDeclarations()}, or {@link #subcomponentDeclarations()}.
*/
final boolean isEmpty() {
return allMembersInjectionBindings().isEmpty()
&& allContributionBindings().isEmpty()
&& multibindingDeclarations().isEmpty()
&& optionalBindingDeclarations().isEmpty()
&& subcomponentDeclarations().isEmpty();
}
/** All bindings for {@link #key()} that are owned by a component. */
ImmutableSet<? extends Binding> bindingsOwnedBy(ComponentDescriptor component) {
return allBindings().get(component.typeElement());
}
/**
* All contribution bindings, regardless of owning component. Empty if this is a members-injection
* binding.
*/
@Memoized
ImmutableSet<ContributionBinding> contributionBindings() {
// TODO(ronshapiro): consider optimizing ImmutableSet.copyOf(Collection) for small immutable
// collections so that it doesn't need to call toArray(). Even though this method is memoized,
// toArray() can take ~150ms for large components, and there are surely other places in the
// processor that can benefit from this.
return ImmutableSet.copyOf(allContributionBindings().values());
}
/** The component that owns {@code binding}. */
final XTypeElement owningComponent(ContributionBinding binding) {
checkArgument(
contributionBindings().contains(binding),
"binding is not resolved for %s: %s",
key(),
binding);
return getOnlyElement(allContributionBindings().inverse().get(binding));
}
/** Creates a {@link ResolvedBindings} for contribution bindings. */
static ResolvedBindings forContributionBindings(
Key key,
Multimap<XTypeElement, ContributionBinding> contributionBindings,
Iterable<MultibindingDeclaration> multibindings,
Iterable<SubcomponentDeclaration> subcomponentDeclarations,
Iterable<OptionalBindingDeclaration> optionalBindingDeclarations) {
return new AutoValue_ResolvedBindings(
key,
ImmutableSetMultimap.copyOf(contributionBindings),
ImmutableMap.of(),
ImmutableSet.copyOf(multibindings),
ImmutableSet.copyOf(subcomponentDeclarations),
ImmutableSet.copyOf(optionalBindingDeclarations));
}
/**
* Creates a {@link ResolvedBindings} for members injection bindings.
*/
static ResolvedBindings forMembersInjectionBinding(
Key key,
ComponentDescriptor owningComponent,
MembersInjectionBinding ownedMembersInjectionBinding) {
return new AutoValue_ResolvedBindings(
key,
ImmutableSetMultimap.of(),
ImmutableMap.of(owningComponent.typeElement(), ownedMembersInjectionBinding),
ImmutableSet.of(),
ImmutableSet.of(),
ImmutableSet.of());
}
/**
* Creates a {@link ResolvedBindings} appropriate for when there are no bindings for the key.
*/
static ResolvedBindings noBindings(Key key) {
return new AutoValue_ResolvedBindings(
key,
ImmutableSetMultimap.of(),
ImmutableMap.of(),
ImmutableSet.of(),
ImmutableSet.of(),
ImmutableSet.of());
}
}
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