/*
* 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.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.FilterFactoryBean;
import org.springframework.integration.config.xml.AbstractConsumerEndpointParser;
import org.springframework.integration.config.xml.IntegrationNamespaceUtils;
import org.springframework.integration.xml.selector.BooleanTestXPathMessageSelector;
import org.springframework.integration.xml.selector.RegexTestXPathMessageSelector;
import org.springframework.integration.xml.selector.StringValueTestXPathMessageSelector;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
/**
* Parser for the <xpath-filter> element.
*
* @author Mark Fisher
* @since 2.1
*/
public class XPathFilterParser extends AbstractConsumerEndpointParser {
private final XPathExpressionParser xpathParser = new XPathExpressionParser();
@Override
protected BeanDefinitionBuilder parseHandler(Element element, ParserContext parserContext) {
final BeanDefinitionBuilder selectorBuilder = BeanDefinitionBuilder.genericBeanDefinition();
selectorBuilder.getBeanDefinition().setBeanClass(BooleanTestXPathMessageSelector.class);
this.configureXPathExpression(element, selectorBuilder, parserContext);
if (element.hasAttribute("match-value")) {
selectorBuilder.addConstructorArgValue(element.getAttribute("match-value"));
String matchType = element.getAttribute("match-type");
if ("exact".equals(matchType)) {
selectorBuilder.getBeanDefinition().setBeanClass(StringValueTestXPathMessageSelector.class);
}
else if ("case-insensitive".equals(matchType)) {
selectorBuilder.getBeanDefinition().setBeanClass(StringValueTestXPathMessageSelector.class);
selectorBuilder.addPropertyValue("caseSensitive", false);
}
else if ("regex".equals(matchType)) {
selectorBuilder.getBeanDefinition().setBeanClass(RegexTestXPathMessageSelector.class);
}
}
BeanDefinitionBuilder builder = BeanDefinitionBuilder.genericBeanDefinition(FilterFactoryBean.class);
builder.addPropertyValue("targetObject", selectorBuilder.getBeanDefinition());
IntegrationNamespaceUtils.setReferenceIfAttributeDefined(builder, element, "discard-channel");
IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, element, "throw-exception-on-rejection");
IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, element, "send-timeout");
return builder;
}
private void configureXPathExpression(Element element, BeanDefinitionBuilder selectorBuilder, ParserContext parserContext) {
String xPathExpressionRef = element.getAttribute("xpath-expression-ref");
NodeList xPathExpressionNodes = element.getElementsByTagNameNS(element.getNamespaceURI(), "xpath-expression");
Assert.isTrue(xPathExpressionNodes.getLength() <= 1, "At most one xpath-expression child may be specified.");
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);
selectorBuilder.addConstructorArgValue(beanDefinition);
}
else {
selectorBuilder.addConstructorArgReference(xPathExpressionRef);
}
}
}