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.impl; 018 019import java.io.InputStream; 020import java.net.URL; 021import java.util.Enumeration; 022 023import org.apache.camel.spi.ClassResolver; 024import org.apache.camel.util.CastUtils; 025import org.apache.camel.util.ObjectHelper; 026 027/** 028 * Default class resolver that uses regular class loader to load classes. 029 */ 030public class DefaultClassResolver implements ClassResolver { 031 032 public Class<?> resolveClass(String name) { 033 return loadClass(name, DefaultClassResolver.class.getClassLoader()); 034 } 035 036 public <T> Class<T> resolveClass(String name, Class<T> type) { 037 Class<T> answer = CastUtils.cast(loadClass(name, DefaultClassResolver.class.getClassLoader())); 038 return answer; 039 } 040 041 public Class<?> resolveClass(String name, ClassLoader loader) { 042 return loadClass(name, loader); 043 } 044 045 public <T> Class<T> resolveClass(String name, Class<T> type, ClassLoader loader) { 046 Class<T> answer = CastUtils.cast(loadClass(name, loader)); 047 return answer; 048 } 049 050 public Class<?> resolveMandatoryClass(String name) throws ClassNotFoundException { 051 Class<?> answer = resolveClass(name); 052 if (answer == null) { 053 throw new ClassNotFoundException(name); 054 } 055 return answer; 056 } 057 058 public <T> Class<T> resolveMandatoryClass(String name, Class<T> type) throws ClassNotFoundException { 059 Class<T> answer = resolveClass(name, type); 060 if (answer == null) { 061 throw new ClassNotFoundException(name); 062 } 063 return answer; 064 } 065 066 public Class<?> resolveMandatoryClass(String name, ClassLoader loader) throws ClassNotFoundException { 067 Class<?> answer = resolveClass(name, loader); 068 if (answer == null) { 069 throw new ClassNotFoundException(name); 070 } 071 return answer; 072 } 073 074 public <T> Class<T> resolveMandatoryClass(String name, Class<T> type, ClassLoader loader) throws ClassNotFoundException { 075 Class<T> answer = resolveClass(name, type, loader); 076 if (answer == null) { 077 throw new ClassNotFoundException(name); 078 } 079 return answer; 080 } 081 082 public InputStream loadResourceAsStream(String uri) { 083 ObjectHelper.notEmpty(uri, "uri"); 084 return ObjectHelper.loadResourceAsStream(uri); 085 } 086 087 public URL loadResourceAsURL(String uri) { 088 ObjectHelper.notEmpty(uri, "uri"); 089 return ObjectHelper.loadResourceAsURL(uri); 090 } 091 092 public Enumeration<URL> loadResourcesAsURL(String uri) { 093 return loadAllResourcesAsURL(uri); 094 } 095 096 @Override 097 public Enumeration<URL> loadAllResourcesAsURL(String uri) { 098 ObjectHelper.notEmpty(uri, "uri"); 099 return ObjectHelper.loadResourcesAsURL(uri); 100 } 101 102 protected Class<?> loadClass(String name, ClassLoader loader) { 103 ObjectHelper.notEmpty(name, "name"); 104 return ObjectHelper.loadClass(name, loader); 105 } 106}