XPATH for retrieving element - web-services

Question

I have this wsdl
<definitions targetNamespace="http://testwork/" name="HelloWorldService"
xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd"
xmlns:wsp="http://www.w3.org/ns/ws-policy" xmlns:wsp1_2="http://schemas.xmlsoap.org/ws/2004/09/policy"
xmlns:wsam="http://www.w3.org/2007/05/addressing/metadata"
xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
xmlns:tns="http://testwork/" xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns="http://schemas.xmlsoap.org/wsdl/" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/">
<types>
<xsd:schema>
<xsd:import namespace="http://soapServlet/" schemaLocation="http://localhost:8085/testwork/soapServlet?xsd=1"/>
</xsd:schema>
</types>
<message name="sayHelloWorldFrom">
<part name="parameters" element="tns:sayHelloWorldFrom"/>
</message>
<message name="sayHelloWorldFromResponse">
<part name="parameters" element="tns:sayHelloWorldFromResponse"/>
</message>
<message name="additionalFault">
<wsdl:part name="error" element="tns:responseFault"/>
</message>
<portType name="HelloWorld">
<operation name="sayHelloWorldFrom">
<input wsam:Action="http://testwork/HelloWorld/sayHelloWorldFromRequest" message="tns:sayHelloWorldFrom"/>
<output wsam:Action="http://testwork/HelloWorld/sayHelloWorldFromResponse" message="tns:sayHelloWorldFromResponse"/>
<wsdl:fault name="error" message="additionalFault"/>
</operation>
</portType>
<binding name="HelloWorldPortBinding" type="tns:HelloWorld">
<soap:binding transport="http://schemas.xmlsoap.org/soap/http" style="document"/>
<operation name="sayHelloWorldFrom">
<soap:operation soapAction=""/>
<input>
<soap:body use="literal"/>
</input>
<output>
<soap:body use="literal"/>
</output>
<fault name="error">
<soap:fault name="error" use="literal"/>
</fault>
</operation>
</binding>
<service name="HelloWorldService">
<port name="HelloWorldPort" binding="tns:HelloWorldPortBinding">
<soap:address location="http://localhost:8085/testwork/soapServlet"/>
</port>
</service>
</definitions>
I want to check if this element "sayHelloWorldFrom" really exists in this schema. I use XPath for searching, this is my snippet of code
InputStream isr = IOUtils.toInputStream(wsdl);
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setNamespaceAware(false);
try {
org.w3c.dom.Document doc = factory.newDocumentBuilder().parse(isr);
XPathFactory xFactory = XPathFactory.newInstance();
XPath xPath = xFactory.newXPath();
org.w3c.dom.Element element = (org.w3c.dom.Element) xPath.compile(
"definitions/portType/operation[#name='" + funcName +
"']").evaluate(doc, XPathConstants.NODE);
log.info("element " + element);
if (element == null) {
throw new ServiceException(ErrorCode.SOAP_EXCEPTION_005);
}
But the element == null for some reason, but I saw via debug that funcName is really sayHelloWorldFrom. Thus what is the problem?

Answer 1

I don't know why, but when I removed this part:
xmlns="http://schemas.xmlsoap.org/wsdl/"
xpath worked (maybe because xmlns means something for xml or xpath)
definitions/portType/operation[#name='sayHelloWorldFrom']
you can check it here http://www.xpathtester.com/obj/2403e210-fac4-4dd2-be63-69fcba8e0ac1