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/*
 * 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 shaded.shaded.com.google.inject.internal;

import static shaded.shaded.com.google.inject.internal.GuiceInternal.GUICE_INTERNAL;
import static shaded.shaded.com.google.inject.spi.Elements.withTrustedSource;

import shaded.shaded.com.google.common.base.MoreObjects;
import shaded.shaded.com.google.common.base.Objects;
import shaded.shaded.com.google.common.collect.ImmutableSet;
import shaded.shaded.com.google.inject.Binder;
import shaded.shaded.com.google.inject.Key;
import shaded.shaded.com.google.inject.spi.BindingTargetVisitor;
import shaded.shaded.com.google.inject.spi.Dependency;
import shaded.shaded.com.google.inject.spi.HasDependencies;
import shaded.shaded.com.google.inject.spi.LinkedKeyBinding;
import java.util.Set;

final class LinkedBindingImpl extends BindingImpl
    implements LinkedKeyBinding, HasDependencies {

  final Key targetKey;

  LinkedBindingImpl(
      InjectorImpl injector,
      Key key,
      Object source,
      InternalFactory internalFactory,
      Scoping scoping,
      Key targetKey) {
    super(injector, key, source, internalFactory, scoping);
    this.targetKey = targetKey;
  }

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

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

  @Override
  public Key getLinkedKey() {
    return targetKey;
  }

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

  @Override
  public BindingImpl withScoping(Scoping scoping) {
    return new LinkedBindingImpl(getSource(), getKey(), scoping, targetKey);
  }

  @Override
  public BindingImpl withKey(Key key) {
    return new LinkedBindingImpl(getSource(), key, getScoping(), targetKey);
  }

  @Override
  public void applyTo(Binder binder) {
    getScoping()
        .applyTo(
            withTrustedSource(GUICE_INTERNAL, binder, 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);
  }
}