com.google.inject.internal.LinkedProviderBindingImpl Maven / Gradle / Ivy

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package com.google.inject.internal;

import com.google.common.base.MoreObjects;
import com.google.common.base.Objects;
import com.google.common.collect.ImmutableSet;
import com.google.inject.Binder;
import com.google.inject.Key;
import com.google.inject.spi.BindingTargetVisitor;
import com.google.inject.spi.Dependency;
import com.google.inject.spi.HasDependencies;
import com.google.inject.spi.ProviderKeyBinding;

import java.util.Set;

final class LinkedProviderBindingImpl
        extends BindingImpl implements ProviderKeyBinding, HasDependencies, DelayedInitialize {

    private final Key> providerKey;

    private final DelayedInitialize delayedInitializer;

    private LinkedProviderBindingImpl(InjectorImpl injector, Key key, Object source,
                                      InternalFactory internalFactory, Scoping scoping,
                                      Key> providerKey,
                                      DelayedInitialize delayedInitializer) {
        super(injector, key, source, internalFactory, scoping);
        this.providerKey = providerKey;
        this.delayedInitializer = delayedInitializer;
    }

    LinkedProviderBindingImpl(InjectorImpl injector, Key key, Object source,
                                     InternalFactory internalFactory, Scoping scoping,
                                     Key> providerKey) {
        this(injector, key, source, internalFactory, scoping, providerKey, null);
    }

    LinkedProviderBindingImpl(Object source, Key key, Scoping scoping,
                              Key> providerKey) {
        super(source, key, scoping);
        this.providerKey = providerKey;
        this.delayedInitializer = null;
    }

    static  LinkedProviderBindingImpl createWithInitializer(InjectorImpl injector, Key key,
                                                                  Object source, InternalFactory internalFactory, Scoping scoping,
                                                                  Key> providerKey,
                                                                  DelayedInitialize delayedInitializer) {
        return new LinkedProviderBindingImpl<>(injector, key, source, internalFactory, scoping,
                providerKey, delayedInitializer);
    }

    @Override
    public  V acceptTargetVisitor(BindingTargetVisitor visitor) {
        return visitor.visit(this);
    }

    @Override
    public Key> getProviderKey() {
        return providerKey;
    }

    @Override
    public void initialize(InjectorImpl injector, Errors errors) throws ErrorsException {
        if (delayedInitializer != null) {
            delayedInitializer.initialize(injector, errors);
        }
    }

    @Override
    public Set> getDependencies() {
        return ImmutableSet.of(Dependency.get(providerKey));
    }

    @Override
    public BindingImpl withScoping(Scoping scoping) {
        return new LinkedProviderBindingImpl<>(getSource(), getKey(), scoping, providerKey);
    }

    @Override
    public BindingImpl withKey(Key key) {
        return new LinkedProviderBindingImpl<>(getSource(), key, getScoping(), providerKey);
    }

    @Override
    public void applyTo(Binder binder) {
        getScoping().applyTo(binder.withSource(getSource())
                .bind(getKey()).toProvider(getProviderKey()));
    }

    @Override
    public String toString() {
        return MoreObjects.toStringHelper(ProviderKeyBinding.class)
                .add("key", getKey())
                .add("source", getSource())
                .add("scope", getScoping())
                .add("provider", providerKey)
                .toString();
    }

    @Override
    public boolean equals(Object obj) {
        if (obj instanceof LinkedProviderBindingImpl) {
            LinkedProviderBindingImpl o = (LinkedProviderBindingImpl) obj;
            return getKey().equals(o.getKey())
                    && getScoping().equals(o.getScoping())
                    && Objects.equal(providerKey, o.providerKey);
        } else {
            return false;
        }
    }

    @Override
    public int hashCode() {
        return Objects.hashCode(getKey(), getScoping(), providerKey);
    }
}