/*
* Copyright 2002-2011 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.xml.config;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.integration.config.xml.AbstractRouterParser;
import org.springframework.integration.config.xml.IntegrationNamespaceUtils;
import org.springframework.integration.xml.router.XPathRouter;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
/**
* Parser for the <xpath-router/> element.
*
* @author Jonas Partner
* @author Mark Fisher
* @author Oleg Zhurakousky
*/
public class XPathRouterParser extends AbstractRouterParser {
private final XPathExpressionParser xpathParser = new XPathExpressionParser();
@Override
protected BeanDefinition doParseRouter(Element element, ParserContext parserContext) {
BeanDefinitionBuilder xpathRouterBuilder = BeanDefinitionBuilder.genericBeanDefinition(XPathRouter.class);
NodeList xPathExpressionNodes = element.getElementsByTagNameNS(element.getNamespaceURI(), "xpath-expression");
Assert.isTrue(xPathExpressionNodes.getLength() <= 1, "At most one xpath-expression child may be specified.");
String xPathExpressionRef = element.getAttribute("xpath-expression-ref");
IntegrationNamespaceUtils.setValueIfAttributeDefined(xpathRouterBuilder, element, "evaluate-as-string");
boolean xPathExpressionChildPresent = (xPathExpressionNodes.getLength() == 1);
boolean xPathReferencePresent = StringUtils.hasText(xPathExpressionRef);
Assert.isTrue(xPathExpressionChildPresent ^ xPathReferencePresent,
"Exactly one of 'xpath-expression' or 'xpath-expression-ref' is required.");
if (xPathExpressionChildPresent) {
BeanDefinition beanDefinition = this.xpathParser.parse((Element) xPathExpressionNodes.item(0), parserContext);
xpathRouterBuilder.addConstructorArgValue(beanDefinition);
}
else {
xpathRouterBuilder.addConstructorArgReference(xPathExpressionRef);
}
IntegrationNamespaceUtils.setReferenceIfAttributeDefined(xpathRouterBuilder, element, "converter");
return xpathRouterBuilder.getBeanDefinition();
}
}