/*
 * Copyright 2002-2007 the original author or authors.
 *
 * Licensed 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.springframework.aop.config;

import org.springframework.aop.aspectj.AspectJExpressionPointcut;
import org.springframework.beans.factory.xml.BeanDefinitionParser;
import org.springframework.beans.factory.xml.NamespaceHandlerSupport;

/**
 * <code>NamespaceHandler</code> for the <code>aop</code> namespace.
 *
 * <p>Provides a {@link org.springframework.beans.factory.xml.BeanDefinitionParser} for the
 * <code><aop:config></code> tag. A <code>config</code> tag can include nested
 * <code>pointcut</code>, <code>advisor</code> and <code>aspect</code> tags.
 *
 * <p>The <code>pointcut</code> tag allows for creation of named
 * {@link AspectJExpressionPointcut} beans using a simple syntax:
 * <pre class="code">
 * <aop:pointcut id="getNameCalls" expression="execution(* *..ITestBean.getName(..))"/>
 * </pre>
 *
 * <p>Using the <code>advisor</code> tag you can configure an {@link org.springframework.aop.Advisor}
 * and have it applied to all relevant beans in you {@link org.springframework.beans.factory.BeanFactory}
 * automatically. The <code>advisor</code> tag supports both in-line and referenced
 * {@link org.springframework.aop.Pointcut Pointcuts}:
 *
 * <pre class="code">
 * <aop:advisor id="getAgeAdvisor"
 *     pointcut="execution(* *..ITestBean.getAge(..))"
 *     advice-ref="getAgeCounter"/>
 *
 * <aop:advisor id="getNameAdvisor"
 *     pointcut-ref="getNameCalls"
 *     advice-ref="getNameCounter"/></pre>
 *
 * @author Rob Harrop
 * @author Adrian Colyer
 * @author Juergen Hoeller
 * @since 2.0
 */
public class AopNamespaceHandler extends NamespaceHandlerSupport {

	/**
	 * Register the {@link BeanDefinitionParser BeanDefinitionParsers} for the
	 * '<code>config</code>', '<code>spring-configured</code>', '<code>aspectj-autoproxy</code>'
	 * and '<code>scoped-proxy</code>' tags.
	 */
	public void init() {
		// In 2.0 XSD as well as in 2.1 XSD.
		registerBeanDefinitionParser("config", new ConfigBeanDefinitionParser());
		registerBeanDefinitionParser("aspectj-autoproxy", new AspectJAutoProxyBeanDefinitionParser());
		registerBeanDefinitionDecorator("scoped-proxy", new ScopedProxyBeanDefinitionDecorator());

		// Only in 2.0 XSD: moved to context namespace as of 2.1
		registerBeanDefinitionParser("spring-configured", new SpringConfiguredBeanDefinitionParser());
	}

}