MapContext Refractor
--------------------
Key: GEOT-3136
URL: http://jira.codehaus.org/browse/GEOT-3136
Project: GeoTools
Issue Type: Improvement
Components: core render
Affects Versions: 2.7-M1
Reporter: Jody Garnett
Assignee: Jody Garnett
MapContext and MapLayer have really grown over time - and in some cases have
diverged from their actual use.
The proposal for simplification is here:
- http://docs.codehaus.org/display/GEOTOOLS/MapContext+Refactor
Summary:
- MapContext use replaced by the class Map (for stability and so we don't have
two java files)
- MapContext itself will gain a toMap() method which can be used by the
renderer to handle code during the transition
- Map uses layers() method to provide direct access to the layer list; removing
30% of the methods from MapContext
- Map has improved "viewport" methods (MapContext viewport model methods are
not currently used in the codebase - in part because they are so confusing)
- MapLayer replaced by Layer class
- Specific Layer subclasses for different kinds of content; this is an open
ended set allowing additional kinds of layers to be added over time for
TileServers, Google Maps and so forth
- DefaultMapLayer re-factored to use an internal Layer delegate (so existing
code will not be broken; and importantly will not be duplicated)
- DefaultMapLayer toLayer() method used by the renderer during the transition
This proposal does not break any existing API; it provides a safe migration
path forward (and like the Query proposal) makes use of classes directly for a
simplified experience.
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