Listener Count datastructure in DocumentImpl should be a document variable and
not static.
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Key: XERCESJ-1345
URL: https://issues.apache.org/jira/browse/XERCESJ-1345
Project: Xerces2-J
Issue Type: Improvement
Reporter: Ludger Bünger
The listener count datastructure is currently a static global hashtable.
This has the disadvantage of not being thread-safe even across otherwise
totally independent document instances since each uses the same static
hashtable to keep track of the number of event listeners registered upon the
document.
A second effect of this is:
Deserializing a document with listeners registered upon it in a freshly created
virtual machine (with a fresh static listener table having no listener count
data inside) causes the document to believe no event listeners are registered
upon it and thus not causing dom events to be fired even though listeners are
registered.
Thus serialisation/deserialisation of documents having listeners registered
upon them is factually broken since the very first implementation of event
listeners using the static listener counters (which is if I did not get it
wrong since event listeners have been implemented in xerces).
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