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 CDI to perform dependency injection. 023 */ 024public interface Injector { 025 026 /** 027 * Instantiates a new instance of the given type; possibly injecting values 028 * into the object in the process (bean post processing) 029 * 030 * @param type the type of object to create 031 * @return a newly created instance 032 */ 033 <T> T newInstance(Class<T> type); 034 035 /** 036 * Instantiates a new instance of the given type by using the factory method 037 * (this will not perform bean post processing) 038 * 039 * @param type the type of object to create 040 * @param factoryMethod to create the new instance via factory method which must be public static and return the type 041 * @return a newly created instance 042 */ 043 <T> T newInstance(Class<T> type, String factoryMethod); 044 045 /** 046 * Instantiates a new instance of the given type; possibly injecting values 047 * into the object in the process (bean post processing if enabled) 048 * 049 * @param type the type of object to create 050 * @param postProcessBean whether to post process the bean 051 * @return a newly created instance 052 */ 053 <T> T newInstance(Class<T> type, boolean postProcessBean); 054 055 /** 056 * Whether the injector supports creating new instances using auto-wiring. 057 * If this is possible then bean instances is attempt first to be created this way 058 * and if not, then the bean can only be created if there is a public no-arg constructor. 059 */ 060 boolean supportsAutoWiring(); 061 062}