How to use Java Embedding activity, getting error

Question

Below is a simple code where in I am just assigning input variable to output variable(of type long), using java embedding activity, and I am getting error in Java Embedding Activity step.
<bpelx:exec name="Java_Embedding_1" language="java" version="1.4">
<![CDATA[ 
Element inputValue1 = (Element)getVariableData("inputVariable", "payload","/client:Pooja_BP1ProcessRequest/client:input1");   
String arg1=inputValue1.getNodeValue(); 
setVariableData("outputVariable", "payload","/client:Pooja_BP1ProcessResponse/client:result", new Long(arg1));]]>
</bpelx:exec>
Runtime Error:
<runtimeFault xmlns="http://schemas.oracle.com/bpel/extension"><part name="code"><code>java.lang.*NumberFormatException*</code>
</part><part name="summary"><summary>null</summary>
</part><part name="detail"><detail>[Ljava.lang.StackTraceElement;@1c50684</detail>
</part></runtimeFault>
Could anyone please point out the mistake?

Answer 1

No, that's not working. Throwing below error.
faultName: {{http://schemas.xmlsoap.org/ws/2003/03/business-process/}selectionFailure}
messageType: {}
parts: {{summary=<summary>XPath query string returns zero node.
According to BPEL4WS spec 1.1 section 14.3, The assign activity &amp;lt;to&amp;gt; part query should not return zero node.
Please check the BPEL source at line number "" and verify the &amp;lt;to&amp;gt; part xpath query.
My output varaible is of type long and there i m creating a Long object using it's constructor which takes in a string, Long(String s)
Actually, I m not just priniting the input, but i need to perform some calculations also on the inputs, like
Element inputValue1 = (Element)getVariableData("inputVariable", "payload","/client:Pooja_BP1ProcessRequest/client:input1");  
Element inputValue2 = (Element)getVariableData("inputVariable", "payload","/client:Pooja_BP1ProcessRequest/client:input2");  
long arg1=Long.parseLong(inputValue1.getNodeValue());  
long arg2=Long.parseLong(inputValue2.getNodeValue());  
long arg3 = arg1+arg2; 
setVariableData("outputVariable", "payload","/client:Pooja_BP1ProcessResponse/client:result", new Long(arg3));