Major Description
The error occurs when parsing big "XLS" files and is caused by the ElementInfo stored in "currentElement".
Each time a new element is started (method startElement) the current elment is newly overwritten with
currentElement = new ElementInfo(currentElement, namespaces);
where the existing element is used as the parent element. Since the currentElement is not reset to the parent element after finishing the element (method: endElement) the method getPrefix recursively traverses the parents and finally causes the StackOverFlowError
For my understanding: something like:
currentElement = currentElement.parent;
in the endElement method solves the issue!
Best