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; 018 019/** 020 * An interface to represent an object which wishes to be injected with 021 * a {@link Component}. 022 */ 023public interface ComponentAware { 024 025 /** 026 * Injects the {@link Component} 027 * 028 * @param component the component 029 */ 030 void setComponent(Component component); 031 032 /** 033 * Get the {@link Component} 034 * 035 * @return the component 036 */ 037 Component getComponent(); 038 039 /** 040 * Get the {@link Component} as the specified type. 041 * 042 * @param type the proprietary class or interface of the underlying concrete Component. 043 * @return an instance of the underlying concrete Component as the required type. 044 * @throws IllegalArgumentException if the component class can't be cast to required type, 045 */ 046 default <T extends Component> T getComponent(Class<T> type) { 047 final Component component = getComponent(); 048 049 if (component == null) { 050 return null; 051 } 052 053 if (Component.class.isAssignableFrom(type)) { 054 return type.cast(component); 055 } 056 057 throw new IllegalArgumentException( 058 "Unable to unwrap the Component type (" + component.getClass() + ") to the required type (" + type + ")" 059 ); 060 } 061}