August Shi created XALANJ-2596:
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Summary: Removing unnecessary creation of FunctionTable
Key: XALANJ-2596
URL: https://issues.apache.org/jira/browse/XALANJ-2596
Project: XalanJ2
Issue Type: Improvement
Security Level: No security risk; visible to anyone (Ordinary problems in
Xalan projects. Anybody can view the issue.)
Components: XPath
Affects Versions: 2.7.2
Reporter: August Shi
Assignee: Steven J. Hathaway
Priority: Minor
I found some inefficiencies in creation of org.apache.xpath.FunctionTable
instances in the code base. Most of the time, a FunctionTable instance is
created and used only to get at the default Functions stored in its static
m_functions field. The only time an instance of the FunctionTable is necessary
is when custom Functions are being installed (so the places where
installFunction() is called), but in the code base there are very few points
where this occurs.
To avoid creation of FunctionTable instances that are of very little use, I
introduce a singleton (defined in FunctionTable) that represents the default
FunctionTable. In all places that instantiate a new instance of FunctionTable
without installing custom Functions, I remove the instantiation and instead use
this singleton.
I will attach a patch file concerning my changes.
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