| Java Source Code / Java Documentation » GIS » GeoTools 2.4.1 » org.geotools.gml |
| org.geotools.gml | ||
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Reads GML files and translates them into Java objects.
GMLDocumentFilter reads in an arbitrary XML file, extracts all GML-namespace associate elements, and translates them into primitive geometry calls, handled by the GMLGeometryHandler. Essentially, GMLDocumentFilter handles all coordinate parsing so that handlers further down the chain never see any character data within GML objects. GMLGeometryFilter implements a GMLGeometryHandler and uses the SubHandlers to create finished JTS-based geometries. This is the only object that GMLGeometryFilter passes on down the chain from the GML namespace. All other XML is passed through without modification. | ||
| Java Source File Name | Type | Comment |
| GMLException.java | Class | An exception used to represent any GML related errors. |
| GMLFilterDocument.java | Class | LEVEL1 saxGML4j GML filter: Sends basic alerts for GML types to
GMLFilterGeometry.
This filter separates and passes GML events to a GMLHandlerGeometry. |
| GMLFilterFeature.java | Class | LEVEL3 GML filter: translates JTS elements and attribute data into features.
This filter simply reads in the events and coordinates passed to it by its GMLFilterDocument child and converts them into JTS objects. |
| GMLFilterGeometry.java | Class | LEVEL2 saxGML4j GML filter: translates coordinates and GML events into OGC
simple types.
This filter simply reads in the events and coordinates passed to it by its GMLFilterDocument child and converts them into JTS objects. |
| GMLHandlerFeature.java | Interface | LEVEL4 saxGML4j GML handler: Gets features. |
| GMLHandlerGeometry.java | Interface | LEVEL2 saxGML4j GML handler: Gets basic alerts from GMLFilterDocument.
This handler is required for any parent of a GMLFilterDocument filter. |
| GMLHandlerJTS.java | Interface | LEVEL3 saxGML4j GML handler: Gets JTS objects. |
| GMLReceiver.java | Class | |
| SubHandler.java | Class | Specifies how a generic OGC simple geometry handler should behave. |
| SubHandlerBox.java | Class | Creates a simple OGC box. |
| SubHandlerFactory.java | Class | Creates the appropriate SubHandler element for a given OGC simple geometry type. |
| SubHandlerLinearRing.java | Class | Creates a simple OGC LinearRing (a closed LineString). |
| SubHandlerLineString.java | Class | Creates a simple OGC LineString element. |
| SubHandlerMulti.java | Class | Creates a MultiPoint, MultiLineString, or MultiPolygon geometry as required by the internal functions. |
| SubHandlerPoint.java | Class | Creates an OGC simple point. |
| SubHandlerPolygon.java | Class | Creates a Polygon geometry. |
| TestHandler.java | Class | Simple test implementation of GMLHandlerJTS. |
Note that the final OGC simple geometry types used by these classes are the
ones developed by Vivid Solutions as part of the Java Topology Suite.
However, this not the only type of Java object that may be generated by using
this suite of filters. For example, you could implement a
GMLGeometryHandler to create custom geometry types or to store OGC simple types
in your own custom format. The illustration shows how this works.