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WebServices: serializing null values
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WebServices: serializing null values

  • Subject: WebServices: serializing null values
  • From: Juergen Lorenz Simon <email@hidden>
  • Date: Thu, 29 May 2008 15:45:01 +0200
Hi,

we're writing a webservice intensive app and ran into the following problem:
when using null values in arguments to calls, we get a deserializer excption.

It looks to me like the generic NSKeyValueCoding<String> _expression_ it wants to use
has no deserializer. I'm slighly amazed to see that anyway, since we're developing
on WO53 due to the shocking mess that are webservices under WO54.

Can anyone shed some light on this?

[2008-05-29 15:38:00 CEST] <WorkerThread11> AxisFault
 faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Server.userException
 faultSubcode: 
 faultString: org.xml.sax.SAXException: Bad types (class com.webobjects.foundation.NSKeyValueCoding$Null -&gt; class java.lang.String)
 faultActor: 
 faultNode: 
 faultDetail: 
{http://xml.apache.org/axis/}stackTrace: org.xml.sax.SAXException: Bad types (class com.webobjects.foundation.NSKeyValueCoding$Null -&gt; class java.lang.String)
at org.apache.axis.message.RPCHandler.onStartChild(RPCHandler.java:311)
at org.apache.axis.encoding.DeserializationContextImpl.startElement(DeserializationContextImpl.java:963)
at org.apache.axis.message.SAX2EventRecorder.replay(SAX2EventRecorder.java:198)
at org.apache.axis.message.MessageElement.publishToHandler(MessageElement.java:722)
at org.apache.axis.message.RPCElement.deserialize(RPCElement.java:233)
at org.apache.axis.message.RPCElement.getParams(RPCElement.java:347)
at org.apache.axis.providers.java.RPCProvider.processMessage(RPCProvider.java:184)
at org.apache.axis.providers.java.JavaProvider.invoke(JavaProvider.java:333)
at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:71)
at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:150)
at org.apache.axis.SimpleChain.invoke(SimpleChain.java:120)
at org.apache.axis.handlers.soap.SOAPService.invoke(SOAPService.java:481)
at org.apache.axis.server.AxisServer.invoke(AxisServer.java:323)
at com.webobjects.appserver._private.WOWebService.performActionNamed(WOWebService.java:375)
at com.webobjects.appserver._private.WOActionRequestHandler._handleRequest(WOActionRequestHandler.java:240)
at com.webobjects.appserver._private.WOActionRequestHandler.handleRequest(WOActionRequestHandler.java:142)
at com.webobjects.appserver._private.WOWebServiceRequestHandler.handleRequest(WOWebServiceRequestHandler.java:95)
at com.webobjects.appserver.WOApplication.dispatchRequest(WOApplication.java:1306)
at er.extensions.ERXApplication.dispatchRequestImmediately(ERXApplication.java:1501)
at er.extensions.ERXApplication.dispatchRequest(ERXApplication.java:1465)
at com.webobjects.appserver._private.WOWorkerThread.runOnce(WOWorkerThread.java:173)
at com.webobjects.appserver._private.WOWorkerThread.run(WOWorkerThread.java:254)
at java.lang.Thread.run(Thread.java:613)


org.xml.sax.SAXException: Bad types (class com.webobjects.foundation.NSKeyValueCoding$Null -> class java.lang.String)
at org.apache.axis.AxisFault.makeFault(AxisFault.java:129)
at org.apache.axis.providers.java.JavaProvider.invoke(JavaProvider.java:340)
at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:71)
at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:150)
at org.apache.axis.SimpleChain.invoke(SimpleChain.java:120)
at org.apache.axis.handlers.soap.SOAPService.invoke(SOAPService.java:481)
at org.apache.axis.server.AxisServer.invoke(AxisServer.java:323)
at com.webobjects.appserver._private.WOWebService.performActionNamed(WOWebService.java:375)
at com.webobjects.appserver._private.WOActionRequestHandler._handleRequest(WOActionRequestHandler.java:240)
at com.webobjects.appserver._private.WOActionRequestHandler.handleRequest(WOActionRequestHandler.java:142)
at com.webobjects.appserver._private.WOWebServiceRequestHandler.handleRequest(WOWebServiceRequestHandler.java:95)
at com.webobjects.appserver.WOApplication.dispatchRequest(WOApplication.java:1306)
at er.extensions.ERXApplication.dispatchRequestImmediately(ERXApplication.java:1501)
at er.extensions.ERXApplication.dispatchRequest(ERXApplication.java:1465)
at com.webobjects.appserver._private.WOWorkerThread.runOnce(WOWorkerThread.java:173)
at com.webobjects.appserver._private.WOWorkerThread.run(WOWorkerThread.java:254)
at java.lang.Thread.run(Thread.java:613)
Caused by: org.xml.sax.SAXException: Bad types (class com.webobjects.foundation.NSKeyValueCoding$Null -> class java.lang.String)
at org.apache.axis.message.RPCHandler.onStartChild(RPCHandler.java:311)
at org.apache.axis.encoding.DeserializationContextImpl.startElement(DeserializationContextImpl.java:963)
at org.apache.axis.message.SAX2EventRecorder.replay(SAX2EventRecorder.java:198)
at org.apache.axis.message.MessageElement.publishToHandler(MessageElement.java:722)
at org.apache.axis.message.RPCElement.deserialize(RPCElement.java:233)
at org.apache.axis.message.RPCElement.getParams(RPCElement.java:347)
at org.apache.axis.providers.java.RPCProvider.processMessage(RPCProvider.java:184)
at org.apache.axis.providers.java.JavaProvider.invoke(JavaProvider.java:333)
... 15 more




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