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/*
 * Copyright (C) 2008 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.spi;

import shaded.shaded.com.google.inject.Binding;

/**
 * No-op visitor for subclassing. All interface methods simply delegate to {@link
 * #visitOther(Binding)}, returning its result.
 *
 * @param  any type to be returned by the visit method. Use {@link Void} with {@code return null}
 *     if no return type is needed.
 * @author [email protected] (Jesse Wilson)
 * @since 2.0
 */
public abstract class DefaultBindingTargetVisitor implements BindingTargetVisitor {

  /** Default visit implementation. Returns {@code null}. */
  protected V visitOther(Binding binding) {
    return null;
  }

  @Override
  public V visit(InstanceBinding instanceBinding) {
    return visitOther(instanceBinding);
  }

  @Override
  public V visit(ProviderInstanceBinding providerInstanceBinding) {
    return visitOther(providerInstanceBinding);
  }

  @Override
  public V visit(ProviderKeyBinding providerKeyBinding) {
    return visitOther(providerKeyBinding);
  }

  @Override
  public V visit(LinkedKeyBinding linkedKeyBinding) {
    return visitOther(linkedKeyBinding);
  }

  @Override
  public V visit(ExposedBinding exposedBinding) {
    return visitOther(exposedBinding);
  }

  @Override
  public V visit(UntargettedBinding untargettedBinding) {
    return visitOther(untargettedBinding);
  }

  @Override
  public V visit(ConstructorBinding constructorBinding) {
    return visitOther(constructorBinding);
  }

  @Override
  public V visit(ConvertedConstantBinding convertedConstantBinding) {
    return visitOther(convertedConstantBinding);
  }

  @Override
  @SuppressWarnings("unchecked")
  public V visit(ProviderBinding providerBinding) {
    // TODO(cushon): remove raw (Binding) cast when we don't care about javac 6 anymore
    return visitOther((Binding) (Binding) providerBinding);
  }
}