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 java.io.InputStream; 020 021 import org.apache.camel.spi.ClassResolver; 022 import org.apache.camel.util.ObjectHelper; 023 024 /** 025 * Default class resolver that uses regular class loader to load classes. 026 */ 027 public class DefaultClassResolver implements ClassResolver { 028 029 public Class resolveClass(String name) { 030 return loadClass(name, DefaultClassResolver.class.getClassLoader()); 031 } 032 033 @SuppressWarnings("unchecked") 034 public <T> Class<T> resolveClass(String name, Class<T> type) { 035 Class answer = loadClass(name, DefaultClassResolver.class.getClassLoader()); 036 return (Class<T>) answer; 037 } 038 039 public Class resolveClass(String name, ClassLoader loader) { 040 return loadClass(name, loader); 041 } 042 043 @SuppressWarnings("unchecked") 044 public <T> Class<T> resolveClass(String name, Class<T> type, ClassLoader loader) { 045 Class answer = loadClass(name, loader); 046 return (Class<T>) answer; 047 } 048 049 public Class resolveMandatoryClass(String name) throws ClassNotFoundException { 050 Class answer = resolveClass(name); 051 if (answer == null) { 052 throw new ClassNotFoundException(name); 053 } 054 return answer; 055 } 056 057 public <T> Class<T> resolveMandatoryClass(String name, Class<T> type) throws ClassNotFoundException { 058 Class<T> answer = resolveClass(name, type); 059 if (answer == null) { 060 throw new ClassNotFoundException(name); 061 } 062 return answer; 063 } 064 065 public Class resolveMandatoryClass(String name, ClassLoader loader) throws ClassNotFoundException { 066 Class answer = resolveClass(name, loader); 067 if (answer == null) { 068 throw new ClassNotFoundException(name); 069 } 070 return answer; 071 } 072 073 public <T> Class<T> resolveMandatoryClass(String name, Class<T> type, ClassLoader loader) throws ClassNotFoundException { 074 Class<T> answer = resolveClass(name, type, loader); 075 if (answer == null) { 076 throw new ClassNotFoundException(name); 077 } 078 return answer; 079 } 080 081 public InputStream loadResourceAsStream(String uri) { 082 ObjectHelper.notEmpty(uri, "uri"); 083 return ObjectHelper.loadResourceAsStream(uri); 084 } 085 086 protected Class loadClass(String name, ClassLoader loader) { 087 ObjectHelper.notEmpty(name, "name"); 088 return ObjectHelper.loadClass(name, loader); 089 } 090 091 }