/*
 * 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.amqp.rabbit.config;

import org.w3c.dom.Element;

import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.util.StringUtils;

/**
 * Parser for <rabbit:admin/>.
 * @author Tomas Lukosius
 * @since 1.0
 */
class AdminParser extends AbstractSingleBeanDefinitionParser {

	private static final String CONNECTION_FACTORY_ATTRIBUTE = "connection-factory";

	private static final String AUTO_STARTUP_ATTRIBUTE = "auto-startup";

	private static final String IGNORE_DECLARATION_EXCEPTIONS = "ignore-declaration-exceptions";

	@Override
	protected String getBeanClassName(Element element) {
		return "org.springframework.amqp.rabbit.core.RabbitAdmin";
	}

	@Override
	protected boolean shouldGenerateId() {
		return false;
	}

	@Override
	protected boolean shouldGenerateIdAsFallback() {
		return true;
	}

	@Override
	protected void doParse(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
		String connectionFactoryRef = element.getAttribute(CONNECTION_FACTORY_ATTRIBUTE);

		// At least one of 'templateRef' or 'connectionFactoryRef' attribute must be set.
		if (!StringUtils.hasText(connectionFactoryRef)) {
			parserContext.getReaderContext().error("A '" + CONNECTION_FACTORY_ATTRIBUTE + "' attribute must be set.",
					element);
		}

		if (StringUtils.hasText(connectionFactoryRef)) {
			// Use constructor with connectionFactory parameter
			builder.addConstructorArgReference(connectionFactoryRef);
		}

		String attributeValue;
		attributeValue = element.getAttribute(AUTO_STARTUP_ATTRIBUTE);
		if (StringUtils.hasText(attributeValue)) {
			builder.addPropertyValue("autoStartup", attributeValue);
		}

		NamespaceUtils.setValueIfAttributeDefined(builder, element, IGNORE_DECLARATION_EXCEPTIONS);
	}
}