https://github.com/google/guice/guice: Guice is a lightweight dependency injection framework for Java 6 and above (Google, Inc.) 
/*
 * Copyright (C) 2009 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.inject.spi.ProvisionListenerBinding;
import com.google.inject.spi.TypeListenerBinding;


Handles Binder#bindListener commands. 
Author:jessewilson@google.com (Jesse Wilson)
/**
 * Handles {@code Binder#bindListener} commands.
 *
 * @author jessewilson@google.com (Jesse Wilson)
 */
final class ListenerBindingProcessor extends AbstractProcessor {

  ListenerBindingProcessor(Errors errors) {
    super(errors);
  }

  @Override
  public Boolean visit(TypeListenerBinding binding) {
    injector.state.addTypeListener(binding);
    return true;
  }

  @Override
  public Boolean visit(ProvisionListenerBinding binding) {
    injector.state.addProvisionListener(binding);
    return true;
  }
}