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; 018 019 import org.apache.camel.spi.ClassResolver; 020 import org.apache.camel.util.ObjectHelper; 021 022 /** 023 * Default class resolver that uses regular class loader to load classes. 024 */ 025 public class DefaultClassResolver implements ClassResolver { 026 027 public Class resolveClass(String name) { 028 return loadClass(name, DefaultClassResolver.class.getClassLoader()); 029 } 030 031 @SuppressWarnings("unchecked") 032 public <T> Class<T> resolveClass(String name, Class<T> type) { 033 Class answer = loadClass(name, DefaultClassResolver.class.getClassLoader()); 034 return (Class<T>) answer; 035 } 036 037 public Class resolveClass(String name, ClassLoader loader) { 038 return loadClass(name, loader); 039 } 040 041 @SuppressWarnings("unchecked") 042 public <T> Class<T> resolveClass(String name, Class<T> type, ClassLoader loader) { 043 Class answer = loadClass(name, loader); 044 return (Class<T>) answer; 045 } 046 047 public Class resolveMandatoryClass(String name) throws ClassNotFoundException { 048 Class answer = resolveClass(name); 049 if (answer == null) { 050 throw new ClassNotFoundException(name); 051 } 052 return answer; 053 } 054 055 public <T> Class<T> resolveMandatoryClass(String name, Class<T> type) throws ClassNotFoundException { 056 Class<T> answer = resolveClass(name, type); 057 if (answer == null) { 058 throw new ClassNotFoundException(name); 059 } 060 return answer; 061 } 062 063 public Class resolveMandatoryClass(String name, ClassLoader loader) throws ClassNotFoundException { 064 Class answer = resolveClass(name, loader); 065 if (answer == null) { 066 throw new ClassNotFoundException(name); 067 } 068 return answer; 069 } 070 071 public <T> Class<T> resolveMandatoryClass(String name, Class<T> type, ClassLoader loader) throws ClassNotFoundException { 072 Class<T> answer = resolveClass(name, type, loader); 073 if (answer == null) { 074 throw new ClassNotFoundException(name); 075 } 076 return answer; 077 } 078 079 protected Class loadClass(String name, ClassLoader loader) { 080 ObjectHelper.notEmpty(name, "name"); 081 return ObjectHelper.loadClass(name, loader); 082 } 083 084 }