001/** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.camel.spi; 018 019/** 020 * A pluggable strategy for creating and possibly dependency injecting objects 021 * which could be implemented using straight forward reflection or using Spring 022 * or Guice to perform dependency injection. 023 * 024 * @version 025 */ 026public interface Injector { 027 028 /** 029 * Instantiates a new instance of the given type possibly injecting values 030 * into the object in the process 031 * 032 * @param type the type of object to create 033 * @return a newly created instance 034 */ 035 <T> T newInstance(Class<T> type); 036 037 /** 038 * Instantiates a new instance of the given object type possibly injecting values 039 * into the object in the process 040 * 041 * @param type the type of object to create 042 * @param instance an instance of the type to create 043 * @return a newly created instance 044 */ 045 <T> T newInstance(Class<T> type, Object instance); 046 047 /** 048 * Whether the injector supports creating new instances using auto-wiring. 049 * If this is possible then bean instances is attempt first to be created this way 050 * and if not, then the bean can only be created if there is a public no-arg constructor. 051 */ 052 boolean supportsAutoWiring(); 053 054}