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 */ 017 package org.apache.camel.impl.converter; 018 019 /** 020 * A caching proxy 021 * 022 * @version $Revision: 37863 $ 023 */ 024 public class CachingInjector<T> { 025 private final TypeConverterRegistry repository; 026 private final Class<T> type; 027 private T instance; 028 029 public CachingInjector(TypeConverterRegistry repository, Class<T> type) { 030 this.repository = repository; 031 this.type = type; 032 } 033 034 public synchronized T newInstance() { 035 if (instance == null) { 036 instance = createInstance(type); 037 } 038 return instance; 039 } 040 041 protected T createInstance(Class<T> t) { 042 return repository.getInjector().newInstance(t); 043 } 044 }