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Java example source code file (Collector.java)

This example Java source code file (Collector.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

collector, defaultbindingtargetvisitor, mapbinderbinding, multibinderbinding, multibindingstargetvisitor, object, optionalbinderbinding, override

The Collector.java Java example source code

 * Copyright (C) 2014 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.multibindings;

import com.google.inject.spi.DefaultBindingTargetVisitor;

class Collector extends DefaultBindingTargetVisitor<Object, Object> implements
    MultibindingsTargetVisitor<Object, Object> {
  MapBinderBinding<? extends Object> mapbinding;
  MultibinderBinding<? extends Object> setbinding;
  OptionalBinderBinding<? extends Object> optionalbinding;

  public Object visit(MapBinderBinding<? extends Object> mapbinding) {
    this.mapbinding = mapbinding;
    return null;

  public Object visit(MultibinderBinding<? extends Object> multibinding) {
   this.setbinding = multibinding;
   return null;
  public Object visit(OptionalBinderBinding<? extends Object> optionalbinding) {
    this.optionalbinding = optionalbinding;
    return null;

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