| /** |
| * 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 org.apache.activemq.jndi; |
| |
| import javax.naming.NameNotFoundException; |
| import javax.naming.NamingException; |
| |
| /** |
| * Allows users to dynamically create items |
| * |
| * |
| */ |
| public abstract class LazyCreateContext extends ReadOnlyContext { |
| public Object lookup(String name) throws NamingException { |
| try { |
| return super.lookup(name); |
| } catch (NameNotFoundException e) { |
| Object answer = createEntry(name); |
| if (answer == null) { |
| throw e; |
| } |
| internalBind(name, answer); |
| return answer; |
| } |
| } |
| |
| protected abstract Object createEntry(String name); |
| } |