/*
 * 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.jpa.config.xml;

import org.w3c.dom.Element;

import org.springframework.beans.BeanMetadataElement;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.parsing.BeanComponentDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.integration.config.xml.AbstractPollingInboundChannelAdapterParser;
import org.springframework.integration.config.xml.IntegrationNamespaceUtils;
import org.springframework.integration.jpa.inbound.JpaPollingChannelAdapter;

/**
 * The JPA Inbound Channel adapter parser
 *
 * @author Amol Nayak
 * @author Gunnar Hillert
 * @author Artem Bilan
 * @since 2.2
 */
public class JpaInboundChannelAdapterParser extends AbstractPollingInboundChannelAdapterParser {

	@Override
	protected BeanMetadataElement parseSource(Element element, ParserContext parserContext) {

		final BeanDefinitionBuilder jpaPollingChannelAdapterBuilder = BeanDefinitionBuilder
				.genericBeanDefinition(JpaPollingChannelAdapter.class);

		final BeanDefinitionBuilder jpaExecutorBuilder = JpaParserUtils.getJpaExecutorBuilder(element, parserContext);

		BeanDefinition definition = IntegrationNamespaceUtils
				.createExpressionDefinitionFromValueOrExpression("max-results", "max-results-expression",
						parserContext, element, false);
		if (definition != null) {
			jpaExecutorBuilder.addPropertyValue("maxResultsExpression", definition);
		}
		IntegrationNamespaceUtils.setValueIfAttributeDefined(jpaExecutorBuilder, element, "delete-after-poll");
		IntegrationNamespaceUtils.setValueIfAttributeDefined(jpaExecutorBuilder, element, "flush-after-delete", "flush");
		IntegrationNamespaceUtils.setValueIfAttributeDefined(jpaExecutorBuilder, element, "delete-in-batch");
		IntegrationNamespaceUtils.setValueIfAttributeDefined(jpaExecutorBuilder, element, "expect-single-result");
		IntegrationNamespaceUtils.setReferenceIfAttributeDefined(jpaExecutorBuilder, element, "parameter-source");

		final BeanDefinition jpaExecutorBuilderBeanDefinition = jpaExecutorBuilder.getBeanDefinition();
		final String channelAdapterId = this.resolveId(element, jpaPollingChannelAdapterBuilder.getRawBeanDefinition(), parserContext);
		final String jpaExecutorBeanName = channelAdapterId + ".jpaExecutor";

		parserContext.registerBeanComponent(new BeanComponentDefinition(jpaExecutorBuilderBeanDefinition, jpaExecutorBeanName));

		jpaPollingChannelAdapterBuilder.addConstructorArgReference(jpaExecutorBeanName);

		return jpaPollingChannelAdapterBuilder.getBeanDefinition();
	}

}