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

Go to download
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.InjectionPoint;
import com.google.inject.spi.ProviderInstanceBinding;
import com.google.inject.spi.ProviderWithExtensionVisitor;

import java.util.Set;

class ProviderInstanceBindingImpl extends BindingImpl implements ProviderInstanceBinding {

    private final javax.inject.Provider providerInstance;

    private final ImmutableSet injectionPoints;

    ProviderInstanceBindingImpl(InjectorImpl injector, Key key,
                                       Object source, InternalFactory internalFactory, Scoping scoping,
                                       javax.inject.Provider providerInstance,
                                       Set injectionPoints) {
        super(injector, key, source, internalFactory, scoping);
        this.providerInstance = providerInstance;
        this.injectionPoints = ImmutableSet.copyOf(injectionPoints);
    }

    ProviderInstanceBindingImpl(Object source, Key key, Scoping scoping,
                                       Set injectionPoints, javax.inject.Provider providerInstance) {
        super(source, key, scoping);
        this.injectionPoints = ImmutableSet.copyOf(injectionPoints);
        this.providerInstance = providerInstance;
    }

    @SuppressWarnings("unchecked") // the extension type is always consistent with the provider type
    public  V acceptTargetVisitor(BindingTargetVisitor visitor) {
        if (providerInstance instanceof ProviderWithExtensionVisitor) {
            return ((ProviderWithExtensionVisitor) providerInstance)
                    .acceptExtensionVisitor(visitor, this);
        } else {
            return visitor.visit(this);
        }
    }

    public javax.inject.Provider getUserSuppliedProvider() {
        return providerInstance;
    }

    public Set getInjectionPoints() {
        return injectionPoints;
    }

    public Set> getDependencies() {
        return providerInstance instanceof HasDependencies
                ? ImmutableSet.copyOf(((HasDependencies) providerInstance).getDependencies())
                : Dependency.forInjectionPoints(injectionPoints);
    }

    public BindingImpl withScoping(Scoping scoping) {
        return new ProviderInstanceBindingImpl<>(getSource(), getKey(), scoping, injectionPoints, providerInstance);
    }

    public BindingImpl withKey(Key key) {
        return new ProviderInstanceBindingImpl<>(getSource(), key, getScoping(), injectionPoints, providerInstance);
    }

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

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

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

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