| /* |
| * 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. |
| */ |
| |
| package flex.messaging.io; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| /** |
| * A simple registry that maps an alias to a concrete class name. This registry |
| * mimics the ActionScript 3 flash.net.registerClassAlias() functionality |
| * of the Flash Player. The registry is checked when deserializing AMF object |
| * types. |
| */ |
| public class ClassAliasRegistry |
| { |
| private Map aliasRegistry = new HashMap(); |
| private static final ClassAliasRegistry registry = new ClassAliasRegistry(); |
| |
| /** |
| * Constructs an empty registry. |
| */ |
| private ClassAliasRegistry() |
| { |
| } |
| |
| /** |
| * Returns the registry singleton. |
| */ |
| public static ClassAliasRegistry getRegistry() |
| { |
| return registry; |
| } |
| |
| /** |
| * Looks for a concrete class name for an alias. |
| * |
| * @param alias The alias used to search the registry. |
| * @return a concrete class name, if registered for this alias, otherwise |
| * null. |
| */ |
| public String getClassName(String alias) |
| { |
| return (String)aliasRegistry.get(alias); |
| } |
| |
| /** |
| * Clears all items from the registry. |
| */ |
| public void clear() |
| { |
| synchronized(aliasRegistry) |
| { |
| aliasRegistry.clear(); |
| } |
| } |
| |
| /** |
| * Registers a custom alias for a class name. |
| * |
| * @param alias The alias for the class name. |
| * @param className The concrete class name. |
| */ |
| public void registerAlias(String alias, String className) |
| { |
| synchronized(aliasRegistry) |
| { |
| aliasRegistry.put(alias, className); |
| } |
| } |
| |
| /** |
| * Removes a class alias from the registry. |
| * |
| * @param alias The alias to be removed from the registry. |
| */ |
| public void unregisterAlias(String alias) |
| { |
| synchronized(aliasRegistry) |
| { |
| aliasRegistry.remove(alias); |
| } |
| } |
| } |