GMLFilterFeature handles character contnet erratically when provided as
multiple chunks
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Key: GEOT-838
URL: http://jira.codehaus.org/browse/GEOT-838
Project: GeoTools
Type: Bug
Components: main
Versions: 2.2-RC2
Reporter: Markus Gebhard
Assigned to: James Macgill
Attachments: GMLFilterFeatureTest.java
In GMLFilterFeature the method characters(char[], int, int) is implemented
erratically, which occasionally leads to erratic Features when parsing GML
documents.
As described in the JavaDoc of org.xml.sax.ContentHandler#characters(char[] ch,
int start, int length) the character content might be passed from the SAX
parser to the content handler in multiple chunks:
"...The Parser will call this method to report each chunk of character data.
SAX parsers may return all contiguous character data in a single chunk, or they
may split it into several chunks; ..."
The GMLFilterFeature implementation, however, only works correctly when each
XML text element is passed in as a single chunk (only one call to this method).
In more or less rare occasions this leads to errors when parsing features in a
format similar to this:
<gml:featureMember><gml:ATTRIBUTE1>value</gml:ATTRIBUTE1></gml:featureMember>
Examples:
- If "value" is passed in as one chunk "value", the resulting feature is
correct. If "value" is passed in as a chunk "val" and a chunk "ue", the
resulting feature has an attribute value "val ue" - with an extra space.
- If 100 is passed in as one chunk "100", the resulting feature is correct. If
100 is passed in as a chunk "1" and a chunk "00", the resulting feature has an
attribute value 0.
I have attached a unit test which can reproduce the problem. I have discovered
the problem while reading GML from the GeoServer. I will try to provide a patch
to fix the problem.
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