the polygonbuilder fails when constructing a geometry with holes after a union
or symdifference operation.
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Key: GEOT-1310
URL: http://jira.codehaus.org/browse/GEOT-1310
Project: GeoTools
Issue Type: Bug
Components: core geometry
Affects Versions: 2.4-M0
Reporter: Graham Davis
Assignee: Graham Davis
There are a fair number of JUnit tests that fail to run because of this problem.
When doing certain operations on polygons, such as union and symdifference
specifically, the resulting geometry is built using the polygon builder. This
uses the maximal/minimal ring edge classes, with implement RingImpl. Often the
resulting polygon is not a simple polygon, but rather a polygon with holes, for
example. The code tries to create a single maximal ring edge with all these
edges/points. This creates a single RingImpl and fails when it does its
consistency check (often a point intersects but isn't the start or end point).
It should really be constructed as one ring for the outer edges, and another
ring for each hole.
Fixing this is going to require either some reworking of the ring edge system,
or perhaps the ability to bypass the consistency check at this stage for this
particular series of events. It may be that we don't even want to use this
system since doing a consistency check at this point seems expensive and
unecessary.
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