/*
 * Copyright 2002-2017 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.cache.config;

import org.w3c.dom.Element;

import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.RuntimeBeanReference;
import org.springframework.beans.factory.xml.NamespaceHandlerSupport;
import org.springframework.util.StringUtils;

NamespaceHandler allowing for the configuration of declarative cache management using either XML or using annotations. 
This namespace handler is the central piece of functionality in the
Spring cache management facilities.
Author:
Costin Leau
Since:
3.1/**
 * {@code NamespaceHandler} allowing for the configuration of declarative
 * cache management using either XML or using annotations.
 *
 * <p>This namespace handler is the central piece of functionality in the
 * Spring cache management facilities.
 *
 * @author Costin Leau
 * @since 3.1
 */
public class CacheNamespaceHandler extends NamespaceHandlerSupport {

	static final String CACHE_MANAGER_ATTRIBUTE = "cache-manager";

	static final String DEFAULT_CACHE_MANAGER_BEAN_NAME = "cacheManager";


	static String extractCacheManager(Element element) {
		return (element.hasAttribute(CacheNamespaceHandler.CACHE_MANAGER_ATTRIBUTE) ?
				element.getAttribute(CacheNamespaceHandler.CACHE_MANAGER_ATTRIBUTE) :
				CacheNamespaceHandler.DEFAULT_CACHE_MANAGER_BEAN_NAME);
	}

	static BeanDefinition parseKeyGenerator(Element element, BeanDefinition def) {
		String name = element.getAttribute("key-generator");
		if (StringUtils.hasText(name)) {
			def.getPropertyValues().add("keyGenerator", new RuntimeBeanReference(name.trim()));
		}
		return def;
	}


	@Override
	public void init() {
		registerBeanDefinitionParser("annotation-driven", new AnnotationDrivenCacheBeanDefinitionParser());
		registerBeanDefinitionParser("advice", new CacheAdviceParser());
	}

}