/*
* Copyright 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 biz.c24.io.spring.integration.config;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.ManagedMap;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.integration.config.xml.AbstractTransformerParser;
import org.springframework.integration.config.xml.IntegrationNamespaceUtils;
import org.springframework.util.StringUtils;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
/**
* Parser for <xpath-header-enricher> elements.
*
* @author Mark Fisher
* @since 2.0
*/
public class XPathHeaderEnricherParser extends AbstractTransformerParser {
@Override
protected final String getTransformerClassName() {
return "biz.c24.io.spring.integration.transformer.C24XPathHeaderEnricher";
}
@Override
protected void parseTransformer(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
ManagedMap<String, Object> headers = new ManagedMap<String, Object>();
this.processHeaders(element, headers, parserContext);
builder.addConstructorArgValue(headers);
IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, element, "default-overwrite");
IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, element, "should-skip-nulls");
}
protected void processHeaders(Element element, ManagedMap<String, Object> headers, ParserContext parserContext) {
Object source = parserContext.extractSource(element);
NodeList childNodes = element.getChildNodes();
for (int i = 0; i < childNodes.getLength(); i++) {
Node node = childNodes.item(i);
if (node.getNodeType() == Node.ELEMENT_NODE) {
Element headerElement = (Element) node;
String elementName = node.getLocalName();
if ("header".equals(elementName)) {
BeanDefinitionBuilder builder = BeanDefinitionBuilder.genericBeanDefinition(
"biz.c24.io.spring.integration.transformer.C24XPathHeaderEnricher$XPathExpressionEvaluatingHeaderValueMessageProcessor");
String expressionString = headerElement.getAttribute("xpath-statement");
String expressionRef = headerElement.getAttribute("xpath-statement-ref");
boolean isExpressionString = StringUtils.hasText(expressionString);
boolean isExpressionRef = StringUtils.hasText(expressionRef);
if (!(isExpressionString ^ isExpressionRef)) {
parserContext.getReaderContext().error(
"Exactly one of the 'xpath-statement' or 'xpath-statement-ref' attributes is required.", source);
}
if (isExpressionString) {
builder.addConstructorArgValue(expressionString);
}
else {
builder.addConstructorArgReference(expressionRef);
}
IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, headerElement, "evaluation-type");
IntegrationNamespaceUtils.setValueIfAttributeDefined(builder, headerElement, "overwrite");
String headerName = headerElement.getAttribute("name");
headers.put(headerName, builder.getBeanDefinition());
}
}
}
}
}