content: /*
   * Copyright (C) 2020 ActiveJ LLC.
   *
   * 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 io.activej.inject;
  
  import io.activej.inject.annotation.Transient;
  
  /**
   * A provider, unlike other DI frameworks, is just a version of {@link Injector#getInstance} with a baked in key.
   * If you need a function that returns a new object each time then you need to make your binding {@link Transient transient}.
   * <p>
   * The main reason for its existence is that it can be fluently requested by {@link io.activej.inject.annotation.Provides provider methods} etc.
   * <p>
   * Also, it can be used for lazy dependency cycle resolution.
   */
  public interface InstanceProvider<T> {
  	Key<T> key();
  
  	T get();
  }
  