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https://wso2.org/jira/browse/MASHUP-753?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16259#action_16259
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Keith Godwin Chapman commented on MASHUP-753:
---------------------------------------------
What does it really mean to return an Attribute?
> Returning an attibuteValue directly causes NPE
> ----------------------------------------------
>
> Key: MASHUP-753
> URL: https://wso2.org/jira/browse/MASHUP-753
> Project: WSO2 Mashup Server
> Issue Type: Bug
> Reporter: Keith Godwin Chapman
> Assignee: Keith Godwin Chapman
> Fix For: 1.1
>
>
> The following function causes a NPE as below,
> function attribute(){
> var test = <item number='1'><item1/></item>;
> var attributeValue = test.attribute("number");
> return attributeValue;
> }
> org.apache.axis2.AxisFault
> at org.apache.axis2.AxisFault.makeFault(AxisFault.java:430)
> at
> org.wso2.javascript.rhino.JavaScriptReceiver.invokeBusinessLogic(JavaScriptReceiver.java:239)
> at
> org.apache.axis2.receivers.AbstractInOutMessageReceiver.invokeBusinessLogic(AbstractInOutMessageReceiver.java:40)
> at
> org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:100)
> at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:176)
> at
> org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:275)
> at
> org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:131)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
> at
> org.wso2.mashup.transport.ServiceUIFilter.doFilter(ServiceUIFilter.java:210)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
> at
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
> at
> org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:667)
> at
> org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
> at
> org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
> at
> org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
> at java.lang.Thread.run(Thread.java:595)
> Caused by: java.lang.NullPointerException
> at
> org.apache.axiom.om.impl.llom.OMElementImpl.addChild(OMElementImpl.java:202)
> at
> org.wso2.javascript.rhino.JavaScriptReceiver.createResponseElement(JavaScriptReceiver.java:1186)
> at
> org.wso2.javascript.rhino.JavaScriptReceiver.buildResponse(JavaScriptReceiver.java:1134)
> at
> org.wso2.javascript.rhino.JavaScriptReceiver.handleSchemaTypeinResponse(JavaScriptReceiver.java:499)
> at
> org.wso2.javascript.rhino.JavaScriptReceiver.handleSimpleTypeinResponse(JavaScriptReceiver.java:485)
> at
> org.wso2.javascript.rhino.JavaScriptReceiver.handleComplexTypeInResponse(JavaScriptReceiver.java:293)
> at
> org.wso2.javascript.rhino.JavaScriptReceiver.invokeBusinessLogic(JavaScriptReceiver.java:217)
> ... 24 more
> But the following function works,
> function attribute(){
> var test = <item number='1'><item1/></item>;
> var attributeValue = test.attribute("number").toString();
> return attributeValue;
> }
> Hence this could be a problem in the E4X impl.
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