/*
 * Copyright 2002-2016 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.integration.gemfire.config.xml;

import org.w3c.dom.Element;

import org.springframework.beans.factory.support.AbstractBeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.integration.config.xml.AbstractChannelAdapterParser;
import org.springframework.integration.config.xml.IntegrationNamespaceUtils;
import org.springframework.integration.gemfire.inbound.CacheListeningMessageProducer;

/**
 * @author David Turanski
 * @author Gary Russell
 * @author Artem Bilan
 * @since 2.1
 */
public class GemfireInboundChannelAdapterParser extends AbstractChannelAdapterParser {

	private static final String ERROR_CHANNEL_ATTRIBUTE = "error-channel";

	private static final String OUTPUT_CHANNEL_PROPERTY = "outputChannel";

	private static final String REGION_ATTRIBUTE = "region";

	private static final String EXPRESSION_ATTRIBUTE = "expression";

	private static final String SUPPORTED_EVENT_TYPES_PROPERTY = "supportedEventTypes";

	private static final String CACHE_EVENTS_ATTRIBUTE = "cache-events";

	@Override
	protected AbstractBeanDefinition doParse(Element element, ParserContext parserContext, String channelName) {
		BeanDefinitionBuilder listeningMessageProducer =
				BeanDefinitionBuilder.genericBeanDefinition(CacheListeningMessageProducer.class);
		IntegrationNamespaceUtils.setValueIfAttributeDefined(listeningMessageProducer, element,
				EXPRESSION_ATTRIBUTE, "payloadExpressionString");
		IntegrationNamespaceUtils.setValueIfAttributeDefined(listeningMessageProducer, element,
				CACHE_EVENTS_ATTRIBUTE, SUPPORTED_EVENT_TYPES_PROPERTY);

		if (!element.hasAttribute(REGION_ATTRIBUTE)) {
			parserContext.getReaderContext().error("'region' attribute is required.", element);
		}

		listeningMessageProducer.addConstructorArgReference(element.getAttribute(REGION_ATTRIBUTE));

		listeningMessageProducer.addPropertyReference(OUTPUT_CHANNEL_PROPERTY, channelName);
		IntegrationNamespaceUtils.setReferenceIfAttributeDefined(listeningMessageProducer, element,
				ERROR_CHANNEL_ATTRIBUTE);
		return listeningMessageProducer.getBeanDefinition();
	}

}