Another reason to do this at the Axiom level - I think we can build support into the Jaxen XPath helper so that it efficiently computes XPaths on Beans/Rowsets/recursive Maps.
Paul On 9/14/07, Paul Fremantle <[EMAIL PROTECTED]> wrote: > I recently added a PayloadHelper class to Synapse. > http://svn.apache.org/repos/asf/webservices/synapse/trunk/java/modules/core/src/main/java/org/apache/synapse/util/PayloadHelper.java > > It can help get/set the following datatypes from a MessageContext: > > XML (OMElement) > XML (StAX) > Binary (DataHandler) > Text (String) > Map (I created a class called SimpleMap which only allows certain > simple datatypes as parameters - e.g. Int, Double, etc). see > http://svn.apache.org/repos/asf/webservices/synapse/trunk/java/modules/core/src/main/java/org/apache/synapse/util/SimpleMap.java > The map needs to have SimpleMap as a further data type allowing some > recursion. This would also allow Beans and JSON to be handled. > > You can also find out what payload type the message is. These messages > are all stored as XML in the Body element using various tags. > > for example binary data is always stored as: <ax:binary > xmlns:ax="http://ws.apache.org/commons/ns/binary";>MTOM > here</ax:binary> > > I'd like to move this support directly into the MessageContext class, > which will make it much easier to write mediators. > > Secondly, I'd like to convert the Map model to use an OMSourcedElement > which would allow us to be more efficient about handling this type. In > other words, if I put in a Map and get it as a Map, no XML processing > happens. If someone remotely sends in an XML Map then I can access it > as a Map object, etc. > > Thirdly, I'd like to add a Rowset object (also based on > OMSourcedElement) which allows us to pass around tabular data (JBDC > tables, etc) > > So in summary, I'd like to be able to store and retrieve "natively" > the following datatypes: > * XML (obviously) but with access via: OM, DOM, StaX and String > * Text access via String/StringBuffer > * Bean/JSON/Map > * Binary access via DataHandler and byte[] > * Rowset > > NEXT! > > I *really* think this support should be in the base Axiom library. > > Here are three reasons: > 1) It means everyone will use the same code, eg. Axis2 JMS transport > will put a Map in and Synapse mediator will get it in the same way > 2) If I just put it in Synapse then I have a problem syncing with > Axis2 transports. If I put it in Axis2 then I add a new dependency to > the public API of Synapse (which currently doesn't expose Axis2 - only > Axiom), or I do a lot of work to hide it. > 3) I think this would be a really cool addition to Axiom! > > Thoughts? Also, who is willing to work with me on coding this? > > Paul > -- Paul Fremantle Co-Founder and VP of Technical Sales, WSO2 OASIS WS-RX TC Co-chair blog: http://pzf.fremantle.org [EMAIL PROTECTED] "Oxygenating the Web Service Platform", www.wso2.com --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
