[Simple-support] NullPointerException for similar Element Names with different @Paths

[amit.shipra <ami...@rb...>]

Hi there, 

XML looks like:

            <ns0:book id="BOOK">
               <ns0:identifier>
                  <ns0:sourceSystem>DTCC</ns0:sourceSystem>
               </ns0:identifier>
            </ns0:book>
            <ns0:trader id="ID_EXECUTING_TRADER">
               <ns0:identifier>
                  <ns0:sourceSystem>NYSE</ns0:sourceSystem>
               </ns0:identifier>
            </ns0:trader>


and my JAVA code (for sourceSystem Element) is:

	@Element(name="sourceSystem")
	@Path("ns0:book/ns0:identifier")
	private String bookSourceSystem="system1";


	@Element(name="sourceSystem")
	@Path("ns0:trader/ns0:identifier")
	private String traderSourceSystem="system2";


However, I am getting the NullPointerException:

StackTrace:
Exception in thread "main" java.lang.NullPointerException
	at
org.simpleframework.xml.core.InstantiatorBuilder.register(InstantiatorBuilder.java:461)
	at
org.simpleframework.xml.core.InstantiatorBuilder.register(InstantiatorBuilder.java:433)
	at
org.simpleframework.xml.core.StructureBuilder.process(StructureBuilder.java:283)
	at
org.simpleframework.xml.core.StructureBuilder.process(StructureBuilder.java:259)
	at
org.simpleframework.xml.core.StructureBuilder.process(StructureBuilder.java:200)
	at org.simpleframework.xml.core.Scanner.field(Scanner.java:511)
	at org.simpleframework.xml.core.Scanner.scan(Scanner.java:395)
	at org.simpleframework.xml.core.Scanner.<init>(Scanner.java:104)
	at
org.simpleframework.xml.core.ScannerFactory.getInstance(ScannerFactory.java:77)
	at org.simpleframework.xml.core.Support.getScanner(Support.java:203)
	at org.simpleframework.xml.core.Source.getScanner(Source.java:271)
	at org.simpleframework.xml.core.Source.getCaller(Source.java:300)
	at org.simpleframework.xml.core.Composite.writeReplace(Composite.java:1147)
	at org.simpleframework.xml.core.Composite.writeUnion(Composite.java:1124)
	at
org.simpleframework.xml.core.Composite.writeElements(Composite.java:1098)
	at org.simpleframework.xml.core.Composite.writeSection(Composite.java:1004)
	at org.simpleframework.xml.core.Composite.write(Composite.java:975)
	at org.simpleframework.xml.core.Composite.write(Composite.java:952)
	at org.simpleframework.xml.core.Composite.writeElement(Composite.java:1256)
	at org.simpleframework.xml.core.Composite.writeElement(Composite.java:1239)
	at org.simpleframework.xml.core.Composite.writeUnion(Composite.java:1127)
	at
org.simpleframework.xml.core.Composite.writeElements(Composite.java:1098)
	at org.simpleframework.xml.core.Composite.writeSection(Composite.java:1004)
	at
org.simpleframework.xml.core.Composite.writeElements(Composite.java:1087)
	at org.simpleframework.xml.core.Composite.writeSection(Composite.java:1004)
	at org.simpleframework.xml.core.Composite.write(Composite.java:975)
	at org.simpleframework.xml.core.Composite.write(Composite.java:952)
	at org.simpleframework.xml.core.Traverser.write(Traverser.java:236)
	at org.simpleframework.xml.core.Traverser.write(Traverser.java:208)
	at org.simpleframework.xml.core.Traverser.write(Traverser.java:186)
	at org.simpleframework.xml.core.Persister.write(Persister.java:1180)
	at org.simpleframework.xml.core.Persister.write(Persister.java:1162)
	at org.simpleframework.xml.core.Persister.write(Persister.java:1140)
	at org.simpleframework.xml.core.Persister.write(Persister.java:1259)
	at org.simpleframework.xml.core.Persister.write(Persister.java:1241)
	at org.simpleframework.xml.core.Persister.write(Persister.java:1222)
	at org.simpleframework.xml.core.Persister.write(Persister.java:1201)


Source code block:

   private void register(Label label, LabelMap map) throws Exception {
      String name = label.getName();  
      String path = label.getPath();
      
      if(map.containsKey(name)) {
         Label current = map.get(name);  <-- THIS RETURNS current AS NULL. 
         String key = current.getPath();
         

Could we have only one Element even if @Paths are different? Struck around
this for long. Is there a work around?


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