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

import shaded.shaded.com.google.inject.Binder;
import shaded.shaded.com.google.inject.TypeLiteral;
import shaded.shaded.com.google.inject.matcher.Matcher;

/**
 * Binds types (picked using a Matcher) to an type listener. Registrations are created explicitly in
 * a module using {@link shaded.shaded.com.google.inject.Binder#bindListener(Matcher, TypeListener)} statements:
 *
 *  *     register(only(new TypeLiteral<PaymentService<CreditCard>>() {}), listener);
 *
 * @author [email protected] (Jesse Wilson)
 * @since 2.0
 */
public final class TypeListenerBinding implements Element {

  private final Object source;
  private final Matcher> typeMatcher;
  private final TypeListener listener;

  TypeListenerBinding(
      Object source, TypeListener listener, Matcher> typeMatcher) {
    this.source = source;
    this.listener = listener;
    this.typeMatcher = typeMatcher;
  }

  /** Returns the registered listener. */
  public TypeListener getListener() {
    return listener;
  }

  /** Returns the type matcher which chooses which types the listener should be notified of. */
  public Matcher> getTypeMatcher() {
    return typeMatcher;
  }

  @Override
  public Object getSource() {
    return source;
  }

  @Override
  public  T acceptVisitor(ElementVisitor visitor) {
    return visitor.visit(this);
  }

  @Override
  public void applyTo(Binder binder) {
    binder.withSource(getSource()).bindListener(typeMatcher, listener);
  }
}