| package org.apache.commons.ognl.internal; |
| |
| /* |
| * 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. |
| */ |
| |
| /* |
| * $Id$ |
| */ |
| public class ClassCacheHandler |
| { |
| |
| private ClassCacheHandler() |
| { |
| } |
| |
| public static <T> T getHandler( Class<?> forClass, ClassCache<T> handlers ) |
| throws CacheException |
| { |
| T answer; |
| |
| synchronized ( handlers ) |
| { |
| answer = handlers.get( forClass ); |
| if ( answer == null ) |
| { |
| Class<?> keyFound; |
| |
| if ( forClass.isArray() ) |
| { |
| answer = handlers.get( Object[].class ); |
| keyFound = null; |
| } |
| else |
| { |
| keyFound = forClass; |
| outer: |
| for ( Class<?> clazz = forClass; clazz != null; clazz = clazz.getSuperclass() ) |
| { |
| answer = handlers.get( clazz ); |
| if ( answer != null ) { |
| keyFound = clazz; |
| break; |
| } |
| Class<?>[] interfaces = clazz.getInterfaces(); |
| for ( Class<?> iface : interfaces ) |
| { |
| answer = handlers.get( iface ); |
| if ( answer == null ) |
| { |
| /* Try super-interfaces */ |
| answer = getHandler( iface, handlers ); |
| } |
| if ( answer != null ) |
| { |
| keyFound = iface; |
| break outer; |
| } |
| } |
| } |
| } |
| if ( answer != null && keyFound != forClass ) |
| { |
| handlers.put( forClass, answer ); |
| } |
| } |
| } |
| return answer; |
| |
| } |
| } |