/*
* 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.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.IntegrationNamespaceUtils;
import org.springframework.integration.jpa.support.OutboundGatewayType;
import org.springframework.util.CollectionUtils;
import org.springframework.util.StringUtils;
import org.springframework.util.xml.DomUtils;
/**
* The Parser for the Retrieving Jpa Outbound Gateway.
*
* @author Amol Nayak
* @author Gunnar Hillert
* @author Artem Bilan
* @since 2.2
*/
public class RetrievingJpaOutboundGatewayParser extends AbstractJpaOutboundGatewayParser {
@Override
protected BeanDefinitionBuilder parseHandler(Element gatewayElement, ParserContext parserContext) {
final BeanDefinitionBuilder jpaOutboundGatewayBuilder = super.parseHandler(gatewayElement, parserContext);
final BeanDefinitionBuilder jpaExecutorBuilder =
JpaParserUtils.getOutboundGatewayJpaExecutorBuilder(gatewayElement, parserContext);
BeanDefinition firstResultExpression = IntegrationNamespaceUtils
.createExpressionDefinitionFromValueOrExpression("first-result", "first-result-expression",
parserContext, gatewayElement, false);
if (firstResultExpression != null) {
jpaExecutorBuilder.addPropertyValue("firstResultExpression", firstResultExpression);
}
BeanDefinition maxResultsExpression = IntegrationNamespaceUtils
.createExpressionDefinitionFromValueOrExpression("max-results", "max-results-expression",
parserContext, gatewayElement, false);
if (maxResultsExpression != null) {
jpaExecutorBuilder.addPropertyValue("maxResultsExpression", maxResultsExpression);
}
if (StringUtils.hasText(gatewayElement.getAttribute("id-expression"))) {
String[] otherAttributes = {"jpa-query", "native-query", "named-query", "first-result",
"first-result-expression", "max-results", "max-results-expression", "delete-in-batch",
"expect-single-result", "parameter-source-factory", "use-payload-as-parameter-source"};
StringBuilder others = new StringBuilder();
for (String otherAttribute : otherAttributes) {
if (gatewayElement.hasAttribute(otherAttribute) &&
StringUtils.hasText(gatewayElement.getAttribute(otherAttribute))) {
if (others.length() > 0) {
others.append(", ");
}
others.append(otherAttribute);
}
}
boolean childElementsExist = !CollectionUtils.isEmpty(DomUtils.getChildElementsByTagName(gatewayElement,
"parameter"));
if (others.length() > 0 || childElementsExist) {
parserContext.getReaderContext().error(
(others.length() == 0 ? "" : "'" + others.toString() + "' "
+ (childElementsExist ? "and " : ""))
+ (childElementsExist ? "child elements " : "")
+ "not allowed with an 'id-expression' attribute.",
gatewayElement);
}
BeanDefinition idExpressionDef =
IntegrationNamespaceUtils.createExpressionDefIfAttributeDefined("id-expression", gatewayElement);
jpaExecutorBuilder.addPropertyValue("idExpression", idExpressionDef);
}
IntegrationNamespaceUtils.setValueIfAttributeDefined(jpaExecutorBuilder, gatewayElement, "delete-after-poll");
IntegrationNamespaceUtils.setValueIfAttributeDefined(
jpaExecutorBuilder, gatewayElement, "flush-after-delete", "flush");
IntegrationNamespaceUtils.setValueIfAttributeDefined(jpaExecutorBuilder, gatewayElement, "delete-in-batch");
IntegrationNamespaceUtils.setValueIfAttributeDefined(jpaExecutorBuilder, gatewayElement, "expect-single-result");
final BeanDefinition jpaExecutorBuilderBeanDefinition = jpaExecutorBuilder.getBeanDefinition();
final String gatewayId = resolveId(gatewayElement, jpaOutboundGatewayBuilder.getRawBeanDefinition(), parserContext);
final String jpaExecutorBeanName = gatewayId + ".jpaExecutor";
parserContext.registerBeanComponent(
new BeanComponentDefinition(jpaExecutorBuilderBeanDefinition, jpaExecutorBeanName));
return jpaOutboundGatewayBuilder.addPropertyReference("jpaExecutor", jpaExecutorBeanName)
.addPropertyValue("gatewayType", OutboundGatewayType.RETRIEVING);
}
}