001/* 002 * Copyright 2002-2018 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.scripting.config; 018 019import org.springframework.beans.factory.config.BeanDefinition; 020import org.springframework.beans.factory.support.BeanDefinitionRegistry; 021import org.springframework.beans.factory.support.RootBeanDefinition; 022import org.springframework.scripting.support.ScriptFactoryPostProcessor; 023 024/** 025 * Utilities for use with {@link LangNamespaceHandler}. 026 * 027 * @author Rob Harrop 028 * @author Mark Fisher 029 * @since 2.5 030 */ 031public abstract class LangNamespaceUtils { 032 033 /** 034 * The unique name under which the internally managed {@link ScriptFactoryPostProcessor} is 035 * registered in the {@link BeanDefinitionRegistry}. 036 */ 037 private static final String SCRIPT_FACTORY_POST_PROCESSOR_BEAN_NAME = 038 "org.springframework.scripting.config.scriptFactoryPostProcessor"; 039 040 041 /** 042 * Register a {@link ScriptFactoryPostProcessor} bean definition in the supplied 043 * {@link BeanDefinitionRegistry} if the {@link ScriptFactoryPostProcessor} hasn't 044 * already been registered. 045 * @param registry the {@link BeanDefinitionRegistry} to register the script processor with 046 * @return the {@link ScriptFactoryPostProcessor} bean definition (new or already registered) 047 */ 048 public static BeanDefinition registerScriptFactoryPostProcessorIfNecessary(BeanDefinitionRegistry registry) { 049 BeanDefinition beanDefinition; 050 if (registry.containsBeanDefinition(SCRIPT_FACTORY_POST_PROCESSOR_BEAN_NAME)) { 051 beanDefinition = registry.getBeanDefinition(SCRIPT_FACTORY_POST_PROCESSOR_BEAN_NAME); 052 } 053 else { 054 beanDefinition = new RootBeanDefinition(ScriptFactoryPostProcessor.class); 055 registry.registerBeanDefinition(SCRIPT_FACTORY_POST_PROCESSOR_BEAN_NAME, beanDefinition); 056 } 057 return beanDefinition; 058 } 059 060}