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Java example source code file (DefaultBindingScopingVisitor.java)

This example Java source code file (DefaultBindingScopingVisitor.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

annotation, bindingscopingvisitor, defaultbindingscopingvisitor

The DefaultBindingScopingVisitor.java Java example source code

/**
 * 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 com.google.inject.spi;

import com.google.inject.Scope;

import java.lang.annotation.Annotation;

/**
 * No-op visitor for subclassing. All interface methods simply delegate to
 * {@link #visitOther()}, returning its result.
 *
 * @param <V> any type to be returned by the visit method. Use {@link Void} with
 *     {@code return null} if no return type is needed.
 * 
 * @author jessewilson@google.com (Jesse Wilson)
 * @since 2.0
 */
public class DefaultBindingScopingVisitor<V> implements BindingScopingVisitor {

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

  public V visitEagerSingleton() {
    return visitOther();
  }

  public V visitScope(Scope scope) {
    return visitOther();
  }

  public V visitScopeAnnotation(Class<? extends Annotation> scopeAnnotation) {
    return visitOther();
  }

  public V visitNoScoping() {
    return visitOther();
  }
}

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