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Java example source code file (LinkedBindingImpl.java)

This example Java source code file (LinkedBindingImpl.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, internalfactory, key, linkedbindingimpl, linkedkeybinding, object, override, scoping, set, string, util

The LinkedBindingImpl.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,
 * 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 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.LinkedKeyBinding;

import java.util.Set;

public final class LinkedBindingImpl<T> extends BindingImpl implements LinkedKeyBinding, HasDependencies {

  final Key<? extends T> targetKey;

  public LinkedBindingImpl(InjectorImpl injector, Key<T> key, Object source,
      InternalFactory<? extends T> internalFactory, Scoping scoping,
      Key<? extends T> targetKey) {
    super(injector, key, source, internalFactory, scoping);
    this.targetKey = targetKey;
  }

  public LinkedBindingImpl(Object source, Key<T> key, Scoping scoping, Key targetKey) {
    super(source, key, scoping);
    this.targetKey = targetKey;
  }

  public <V> V acceptTargetVisitor(BindingTargetVisitor visitor) {
    return visitor.visit(this);
  }

  public Key<? extends T> getLinkedKey() {
    return targetKey;
  }

  public Set<Dependency getDependencies() {
    return ImmutableSet.<Dependencyof(Dependency.get(targetKey));
  }

  public BindingImpl<T> withScoping(Scoping scoping) {
    return new LinkedBindingImpl<T>(getSource(), getKey(), scoping, targetKey);
  }

  public BindingImpl<T> withKey(Key key) {
    return new LinkedBindingImpl<T>(getSource(), key, getScoping(), targetKey);
  }

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

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

  @Override
  public boolean equals(Object obj) {
    if(obj instanceof LinkedBindingImpl) {
      LinkedBindingImpl<?> o = (LinkedBindingImpl)obj;
      return getKey().equals(o.getKey())
        && getScoping().equals(o.getScoping())
        && Objects.equal(targetKey, o.targetKey);
    } else {
      return false;
    }
  }

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

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