com.vividsolutions.jts.geomgraph
Class TopologyLocation
java.lang.Object
com.vividsolutions.jts.geomgraph.TopologyLocation
public class TopologyLocation
extends java.lang.Object
A TopologyLocation is the labelling of a
GraphComponent's topological relationship to a single Geometry.
If the parent component is an area edge, each side and the edge itself
have a topological location. These locations are named
- ON: on the edge
- LEFT: left-hand side of the edge
- RIGHT: right-hand side
If the parent component is a line edge or node, there is a single
topological relationship attribute, ON.
The possible values of a topological location are
{Location.NONE, Location.EXTERIOR, Location.BOUNDARY, Location.INTERIOR}
The labelling is stored in an array location[j] where
where j has the values ON, LEFT, RIGHT
TopologyLocation
public TopologyLocation(int on)
TopologyLocation
public TopologyLocation(int on,
int left,
int right)
Constructs a TopologyLocation specifying how points on, to the left of, and to the
right of some GraphComponent relate to some Geometry. Possible values for the
parameters are Location.NULL, Location.EXTERIOR, Location.BOUNDARY,
and Location.INTERIOR.
TopologyLocation
public TopologyLocation(int[] location)
allPositionsEqual
public boolean allPositionsEqual(int loc)
get
public int get(int posIndex)
getLocations
public int[] getLocations()
isAnyNull
public boolean isAnyNull()
- true if any locations are NULL
isArea
public boolean isArea()
isLine
public boolean isLine()
isNull
public boolean isNull()
- true if all locations are NULL
merge
public void merge(TopologyLocation gl)
merge updates only the NULL attributes of this object
with the attributes of another.
setAllLocations
public void setAllLocations(int locValue)
setAllLocationsIfNull
public void setAllLocationsIfNull(int locValue)
setLocation
public void setLocation(int locValue)
setLocation
public void setLocation(int locIndex,
int locValue)
setLocations
public void setLocations(int on,
int left,
int right)
toString
public String toString()