Re: cxf advanced examples

[Anthony Fryer]

I have a simple cxf interceptor in a project that just forces the text of an
xml element in a web service response to be wrapped in a CDATA element.  It
would probably make for a good example.

There's 2 classes I have to implement the interceptor...

public class CDataContentWriter extends DelegatingXMLStreamWriter {
        private static final Pattern XML_CHARS = Pattern.compile("[&<>]");
        private String currentElementLocalName;

        public CDataContentWriter(XMLStreamWriter writer) {
                super(writer);
        }

        @Override
        public void writeCharacters(String text) throws XMLStreamException {
                boolean useCData = XML_CHARS.matcher(text).find();
                if (useCData) {
                        super.writeCData(text);
                } else {
                        super.writeCharacters(text);
                }
        }

        @Override
        public void writeStartElement(String prefix, String local, String uri)
                        throws XMLStreamException {
                currentElementLocalName = local;
                super.writeStartElement(prefix, local, uri);
        }
}

public class CDataWriterInterceptor extends
AbstractPhaseInterceptor<Message> {

        public CDataWriterInterceptor() {
                super(Phase.PRE_STREAM);
                addAfter(AttachmentOutInterceptor.class.getName());
        }

        @Override
        public void handleMessage(Message message) throws Fault {
                message.put("disable.outputstream.optimization", Boolean.TRUE);
                XMLStreamWriter writer =
StaxUtils.createXMLStreamWriter(message.getContent(OutputStream.class));
                message.setContent(XMLStreamWriter.class, new 
CDataContentWriter(writer));
        }
}

Then in my resources.xml (or you could use tomee.xml) i declare the
interceptor as a service...

<resources>
    ....
   <Service id="cdataWriterInterceptor"
class-name="au.com.cyberavenue.cxf.CDataWriterInterceptor"/>
   
</resources> 

Lastly, I had to create an openejb-jar.xml (located in my WEB-INF folder)
which is where i hook up the interceptor service to individual web
services...

<openejb-jar xmlns="http://www.openejb.org/openejb-jar/1.1";>

  <ejb-deployment ejb-name="GetBoardingPassDataImpl">
    <properties>
      cxf.jaxws.out-interceptors = cdataWriterInterceptor
    </properties>
  </ejb-deployment>
  
  <ejb-deployment ejb-name="BoardingPassBarCodeImpl">
    <properties>
      cxf.jaxws.out-interceptors = cdataWriterInterceptor
    </properties>
  </ejb-deployment>
  
</openejb-jar>

So I ended up with 2 webservices where the response xml will have CDATA
elements instead of escaped strings.  Hope this helps.

Regards,

Anthony





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