| package org.apache.commons.ognl; |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| /** |
| * Default class resolution. Uses ClassLoader.loadClass() to look up classes by name. It also looks in the "java.lang" |
| * package |
| * if the class named does not give a package specifier, allowing easier usage of these classes. |
| */ |
| public class DefaultClassResolver |
| implements ClassResolver |
| { |
| private final Map<String, Class<?>> classes = new HashMap<String, Class<?>>( 101 ); |
| |
| /** |
| * Resolves a class for a given className |
| * |
| * @param className The name of the Class |
| * @return The resulting Class object |
| * @throws ClassNotFoundException If the class could not be found |
| */ |
| public Class<?> classForName( String className ) |
| throws ClassNotFoundException |
| { |
| return classForName( className, null ); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public Class<?> classForName( String className, Map<String, Object> unused ) |
| throws ClassNotFoundException |
| { |
| Class<?> result = classes.get( className ); |
| |
| if ( result == null ) |
| { |
| ClassLoader classLoader = ClassLoader.getSystemClassLoader(); |
| try |
| { |
| result = classLoader.loadClass( className ); |
| } |
| catch ( ClassNotFoundException ex ) |
| { |
| if ( className.indexOf( '.' ) == -1 ) |
| { |
| result = classLoader.loadClass( "java.lang." + className ); |
| classes.put( "java.lang." + className, result ); |
| } |
| } |
| classes.put( className, result ); |
| } |
| return result; |
| } |
| } |