/*
 * 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.spi;

import com.google.inject.TypeLiteral;

Listens for Guice to encounter injectable types. If a given type has its constructor injected in one situation but only its methods and fields injected in another, Guice will notify this listener once.

Useful for extra type checking, registering injection listeners, and binding method interceptors.

Since:2.0
/** * Listens for Guice to encounter injectable types. If a given type has its constructor injected in * one situation but only its methods and fields injected in another, Guice will notify this * listener once. * * <p>Useful for extra type checking, {@linkplain TypeEncounter#register(InjectionListener) * registering injection listeners}, and {@linkplain TypeEncounter#bindInterceptor( * com.google.inject.matcher.Matcher, org.aopalliance.intercept.MethodInterceptor[]) binding method * interceptors}. * * @since 2.0 */
public interface TypeListener {
Invoked when Guice encounters a new type eligible for constructor or members injection. Called during injector creation (or afterwards if Guice encounters a type at run time and creates a JIT binding).
Params:
  • type – encountered by Guice
  • encounter – context of this encounter, enables reporting errors, registering injection listeners and binding method interceptors for type.
Type parameters:
  • <I> – the injectable type
/** * Invoked when Guice encounters a new type eligible for constructor or members injection. Called * during injector creation (or afterwards if Guice encounters a type at run time and creates a * JIT binding). * * @param type encountered by Guice * @param encounter context of this encounter, enables reporting errors, registering injection * listeners and binding method interceptors for {@code type}. * @param <I> the injectable type */
<I> void hear(TypeLiteral<I> type, TypeEncounter<I> encounter); }