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 }