Hi All,
The Jersey Client API (version 1.4) throws a NullPointerException when
accessing endpoints using JSON and when the response JSON markup
contains attributes:
Caused by: java.lang.NullPointerException
at
com.sun.org.apache.xalan.internal.xsltc.trax.SAX2DOM.startElement(SAX2DOM.java:212)
at
com.sun.org.apache.xml.internal.serializer.ToXMLSAXHandler.closeStartTag(ToXMLSAXHandler.java:204)
at
com.sun.org.apache.xml.internal.serializer.ToSAXHandler.flushPending(ToSAXHandler.java:277)
at
com.sun.org.apache.xml.internal.serializer.ToXMLSAXHandler.startElement(ToXMLSAXHandler.java:646)
at
com.sun.org.apache.xalan.internal.xsltc.trax.TransformerHandlerImpl.startElement(TransformerHandlerImpl.java:263)
at
com.sun.xml.bind.v2.runtime.unmarshaller.DomLoader.startElement(DomLoader.java:118)
at
com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext._startElement(UnmarshallingContext.java:481)
at
com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.startElement(UnmarshallingContext.java:459)
at
com.sun.xml.bind.v2.runtime.unmarshaller.InterningXmlVisitor.startElement(InterningXmlVisitor.java:71)
at
com.sun.xml.bind.v2.runtime.unmarshaller.StAXStreamConnector.handleStartElement(StAXStreamConnector.java:242)
at
com.sun.xml.bind.v2.runtime.unmarshaller.StAXStreamConnector.bridge(StAXStreamConnector.java:176)
at
com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:360)
at
com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:339)
at
com.sun.jersey.json.impl.BaseJSONUnmarshaller.unmarshalJAXBElementFromJSON(BaseJSONUnmarshaller.java:108)
at
com.sun.jersey.json.impl.BaseJSONUnmarshaller.unmarshalFromJSON(BaseJSONUnmarshaller.java:97)
at
com.sun.jersey.json.impl.provider.entity.JSONRootElementProvider.readFrom(JSONRootElementProvider.java:125)
at
com.sun.jersey.core.provider.jaxb.AbstractRootElementProvider.readFrom(AbstractRootElementProvider.java:109)
at
com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:552)
at
com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:505)
at com.sun.jersey.api.client.WebResource.handle(WebResource.java:563)
at com.sun.jersey.api.client.WebResource.access$200(WebResource.java:72)
at com.sun.jersey.api.client.WebResource$Builder.get(WebResource.java:454)
Quickly looking at this, it would seem that the NullPointerException
is caused by the fact that the Jersey's
JsonReaderXmlEvent.getAttributeType(int index) always returns a hard
coded null. Is this correct? I mean shouldn't it be returning "CDATA"
instead (as recommended in the section '3.3.3 Attribute-Value
Normalization' of the XML 1.0 Recommendation)?
If it is correct then I would appreciate any input on how to use the
Jersey Client API together with endpoints that use JSON attributes.
Thanks,
Jussi