Class InputExtracter

Hierarchy: Object , InputExtracter

All Implemented Interfaces: GeometryFilter

class InputExtracter
implements GeometryFilter

Extracts atomic elements from input geometries or collections, recording the dimension found. Empty geometries are discarded since they do not contribute to the result of UnaryUnionOp.

Authors:: Martin Davis

public InputExtracter()

public static InputExtracter extract(Collection<Geometry> geoms)

Extracts elements from a collection of geometries.

Parameters:: geoms - geoms a collection of geometries

Returns:: an extracter over the geometries

public static InputExtracter extract(Geometry geom)

Extracts elements from a geometry.

Parameters:: geoms - geoms a geometry to extract from

Returns:: an extracter over the geometry

public boolean isEmpty()

Tests whether there were any non-empty geometries extracted.

Returns:: true if there is a non-empty geometry present

public int getDimension()

Gets the maximum dimension extracted.

Returns:: the maximum extracted dimension

public GeometryFactory getFactory()

Gets the geometry factory from the extracted geometry, if there is one. If an empty collection was extracted, will return null.

Returns:: a geometry factory, or null if one could not be determined

public List getExtract(int dim)

Gets the extracted atomic geometries of the given dimension dim.

Parameters:: dim - dim the dimension of geometry to return

Returns:: a list of the extracted geometries of dimension dim.

public void filter(Geometry geom)