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Java example source code file (ProviderInstanceBindingImpl.java)

This example Java source code file (ProviderInstanceBindingImpl.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

hasdependencies, immutableset, internalfactory, key, object, override, providerinstancebindingimpl, providerwithextensionvisitor, scoping, set, string, suppresswarnings, util

The ProviderInstanceBindingImpl.java Java example source code

 * Copyright (C) 2007 Google Inc.
 * 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,
 * See the License for the specific language governing permissions and
 * limitations under the License.

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.Provider;
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 com.google.inject.util.Providers;

import java.util.Set;

class ProviderInstanceBindingImpl<T> extends BindingImpl implements ProviderInstanceBinding {

  final javax.inject.Provider<? extends T> providerInstance;
  final ImmutableSet<InjectionPoint> injectionPoints;

  public ProviderInstanceBindingImpl(InjectorImpl injector, Key<T> key,
      Object source, InternalFactory<? extends T> internalFactory, Scoping scoping,
      javax.inject.Provider<? extends T> providerInstance,
      Set<InjectionPoint> injectionPoints) {
    super(injector, key, source, internalFactory, scoping);
    this.providerInstance = providerInstance;
    this.injectionPoints = ImmutableSet.copyOf(injectionPoints);

  public ProviderInstanceBindingImpl(Object source, Key<T> key, Scoping scoping,
      Set<InjectionPoint> 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> V acceptTargetVisitor(BindingTargetVisitor visitor) {
    if(providerInstance instanceof ProviderWithExtensionVisitor) {
      return ((ProviderWithExtensionVisitor<? extends T>) providerInstance)
          .acceptExtensionVisitor(visitor, this);
    } else {
      return visitor.visit(this);

  public Provider<? extends T> getProviderInstance() {
    return Providers.guicify(providerInstance);
  public javax.inject.Provider<? extends T> getUserSuppliedProvider() {
    return providerInstance;

  public Set<InjectionPoint> getInjectionPoints() {
    return injectionPoints;

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

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

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

  public void applyTo(Binder binder) {

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

  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;

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

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