Simples Assim

https://bugs.eclipse.org/bugs/show_bug.cgi?id=354709 (vote for it!)

http://www.xqdt.org/

As per section 3.10 of the spec, the else-expression is required, but you can write it as:

if (true())
then
  <Element>Text</Element>
else
  ()

It can’t be realized without custom processors because although several expression languages can retrieve the exception message, neither the XQuery or XSLT components work with fault messages.

WSDL

<wsdl:definitions targetNamespace="http://www.fernandoribeiro.eti.br/ws/sample" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:tns="http://www.fernandoribeiro.eti.br/ws/sample" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/">
    <wsdl:types>
        <xs:schema elementFormDefault="qualified" targetNamespace="http://www.fernandoribeiro.eti.br/ws/sample" xmlns:xs="http://www.w3.org/2001/XMLSchema">
            ...
            <xs:element name="SampleFault"> <!-- great opportunity for a common type -->
                <xs:complexType>
                    <xs:sequence>
                        <xs:element name="Message" type="xs:string" />
                    </xs:sequence>
                </xs:complexType>
            </xs:element>
        </xs:schema>
    </wsdl:types>
    ...
    <wsdl:message name="SampleFault">
        <wsdl:part name="SampleFault" element="tns:SampleFault" />
    </wsdl:message>
    <wsdl:portType name="SamplePortType">
        <wsdl:operation name="SampleOperation">
            ...
            <wsdl:fault name="SampleFault" message="tns:SampleFault" />
        </wsdl:operation>
    </wsdl:portType>
    <wsdl:binding name="SampleSoapBinding" type="tns:SamplePortType">
        <soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http" />
        ...
        <wsdl:operation name="SampleOperation">
            <soap:operation ... />
            ...
            <wsdl:fault name="SampleFault">
                <soap:fault name="SampleFault" use="literal" />
            </wsdl:fault>
        </wsdl:operation>
    </wsdl:binding>
    <wsdl:service name="SampleService">
        <wsdl:port name="SamplePort" binding="tns:SampleSoapBinding">
            <soap:address location="http://ws.fernandoribeiro.eti.br/SampleService/" />
        </wsdl:port>
    </wsdl:service>
</wsdl:definitions>

RouteBuilder

package br.eti.fernandoribeiro.ws.sample;

import org.apache.camel.builder.RouteBuilder;

public final class SampleRouteBuilder extends RouteBuilder {

    @Override
    public void configure() throws Exception {
        onException(Exception.class).process(new SampleFaultProcessor());

        ...
    }

}

Processor

package br.eti.fernandoribeiro.ws.sample;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

public final class SampleFaultProcessor implements Processor {
    private static final DocumentBuilderFactory FACTORY = DocumentBuilderFactory.newInstance();

    private DocumentBuilder builder;

    public SampleFaultProcessor() throws ParserConfigurationException {
        builder = FACTORY.newDocumentBuilder();
    }

    public void process(final Exchange exch) throws ParserConfigurationException {
        final Document doc = builder.newDocument();

        final Element root = doc.createElementNS("http://www.fernandoribeiro.eti.br/ws/sample", "SampleFault");

        final Element msg = doc.createElementNS("http://www.fernandoribeiro.eti.br/ws/sample", "Message");

        msg.setTextContent(exch.getException().getMessage());

        root.appendChild(msg);

        doc.appendChild(root);

        exch.getFault().setBody(doc);
    }

}

SOAP Response

<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
   <SOAP-ENV:Body>
      <SOAP-ENV:Fault>
         <faultcode>SOAP-ENV:Server</faultcode>
         <faultstring/>
         <detail>
            <SampleFault xmlns="http://www.fernandoribeiro.eti.br/ws/sample">
               <Message>Sample Message</Message>
            </SampleFault>
         </detail>
      </SOAP-ENV:Fault>
   </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

It still misses support for XQuery.

https://jira.jboss.org/jira/browse/JBESB-3074 (vote for it!)

http://www.w3.org/TR/xquery/#id-flwor-expressions

Before you deploy routes with XQuery, you need to install the camel-saxon feature, as well as adding it to your POMs.

http://camel.apache.org/xquery.html

When using it, you may need to iterate through several element lists:

import org.apache.xmlbeans.XmlCursor;
...
final XmlCursor cur = el.newCursor();

cur.selectPath("declare namespace simplesassim='http://fernandoribeiro.eti.br'; simplesassim:Element1 | simplesassim:Element2");

while (cur.toNextSelection()) {
  final Object obj = cur.getObject();
  ...
}

http://xmlbeans.apache.org/docs/2.0.0/guide/conSelectingXMLwithXQueryPathXPath.html

With the DataDirect Shadow product’s patent-pending design, processing associated with SOA integration and data queries can be diverted from the mainframe’s General Purpose Processor (GPP) to be handled by the zIIP specialty engine – which does the work without using any of the mainframe licensed MIPs capacity.

Wouldn’t it be great if Progress Sonic ESB and DataDirect Shadow z/Services were integrated? There could also be service types for DataDirect XQuery and DataDirect XML Converters.

It ain’t really bad news for ESBs that web services can be created downstream, there is plenty to do in the middle.

http://www.businesswire.com/portal/site/google/?ndmViewId=news_view&newsId=20090505005528&newsLang=en

XSLT

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <xsl:template match="/Root">
    <Root>
      <Element>
        <xsl:attribute name="xsi:nil">true</xsl:attribute>
      </Element>
    </Root>
  </xsl:template>
</xsl:stylesheet>

XQuery

declare namespace xsi= "http://www.w3.org/2001/XMLSchema-instance";

<Root>
  <Element>
    {
      attribute xsi:nil {true()}
    }
  </Element>
</Root>

http://www.w3.org/TR/xquery/#id-computedAttributes

http://www.w3.org/TR/xpath-functions/