Package org.meteoinfo.jts.noding

Class NodedSegmentString

java.lang.Object

org.meteoinfo.jts.noding.NodedSegmentString

All Implemented Interfaces:

NodableSegmentString, SegmentString

public class NodedSegmentString
extends java.lang.Object
implements NodableSegmentString

Represents a list of contiguous line segments, and supports noding the segments. The line segments are represented by an array of Coordinates. Intended to optimize the noding of contiguous segments by reducing the number of allocated objects. SegmentStrings can carry a context object, which is useful for preserving topological or parentage information. All noded substrings are initialized with the same context object.

Constructor Summary

Constructors

Constructor	Description
NodedSegmentString(Coordinate[] pts, java.lang.Object data)	Creates a new segment string from a list of vertices.

Method Summary

Modifier and Type	Method	Description
void	addIntersection(LineIntersector li, int segmentIndex, int geomIndex, int intIndex)	Add an SegmentNode for intersection intIndex.
void	addIntersection(Coordinate intPt, int segmentIndex)	Adds an intersection node for a given point and segment to this segment string.
SegmentNode	addIntersectionNode(Coordinate intPt, int segmentIndex)	Adds an intersection node for a given point and segment to this segment string.
void	addIntersections(LineIntersector li, int segmentIndex, int geomIndex)	Adds EdgeIntersections for one or both intersections found for a segment of an edge to the edge intersection list.
Coordinate	getCoordinate(int i)
Coordinate[]	getCoordinates()
java.lang.Object	getData()	Gets the user-defined data for this segment string.
static java.util.List	getNodedSubstrings(java.util.Collection segStrings)	Gets the SegmentStrings which result from splitting this string at node points.
static void	getNodedSubstrings(java.util.Collection segStrings, java.util.Collection resultEdgelist)	Adds the noded SegmentStrings which result from splitting this string at node points.
SegmentNodeList	getNodeList()
int	getSegmentOctant(int index)	Gets the octant of the segment starting at vertex index.
boolean	isClosed()
void	setData(java.lang.Object data)	Sets the user-defined data for this segment string.
int	size()
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

NodedSegmentString

public NodedSegmentString(Coordinate[] pts,
                          java.lang.Object data)

Creates a new segment string from a list of vertices.

Parameters:

pts - the vertices of the segment string

data - the user-defined data of this segment string (may be null)

Method Detail

getNodedSubstrings

public static java.util.List getNodedSubstrings(java.util.Collection segStrings)

Gets the SegmentStrings which result from splitting this string at node points.

Parameters:

segStrings - a Collection of NodedSegmentStrings

Returns:

a Collection of NodedSegmentStrings representing the substrings

getNodedSubstrings

public static void getNodedSubstrings(java.util.Collection segStrings,
                                      java.util.Collection resultEdgelist)

Adds the noded SegmentStrings which result from splitting this string at node points.

Parameters:

segStrings - a Collection of NodedSegmentStrings

resultEdgelist - a List which will collect the NodedSegmentStrings representing the substrings

getData

public java.lang.Object getData()

Gets the user-defined data for this segment string.

Specified by:

getData in interface SegmentString

Returns:

the user-defined data

setData

public void setData(java.lang.Object data)

Sets the user-defined data for this segment string.

Specified by:

setData in interface SegmentString

Parameters:

data - an Object containing user-defined data

getNodeList

public SegmentNodeList getNodeList()

size

public int size()

Specified by:

size in interface SegmentString

getCoordinate

public Coordinate getCoordinate(int i)

Specified by:

getCoordinate in interface SegmentString

getCoordinates

public Coordinate[] getCoordinates()

Specified by:

getCoordinates in interface SegmentString

isClosed

public boolean isClosed()

Specified by:

isClosed in interface SegmentString

getSegmentOctant

public int getSegmentOctant(int index)

Gets the octant of the segment starting at vertex index.

Parameters:

index - the index of the vertex starting the segment. Must not be the last index in the vertex list

Returns:

the octant of the segment at the vertex

addIntersections

public void addIntersections(LineIntersector li,
                             int segmentIndex,
                             int geomIndex)

Adds EdgeIntersections for one or both intersections found for a segment of an edge to the edge intersection list.

addIntersection

public void addIntersection(LineIntersector li,
                            int segmentIndex,
                            int geomIndex,
                            int intIndex)

Add an SegmentNode for intersection intIndex. An intersection that falls exactly on a vertex of the SegmentString is normalized to use the higher of the two possible segmentIndexes

addIntersection

public void addIntersection(Coordinate intPt,
                            int segmentIndex)

Adds an intersection node for a given point and segment to this segment string.

Specified by:

addIntersection in interface NodableSegmentString

Parameters:

intPt - the location of the intersection

segmentIndex - the index of the segment containing the intersection

addIntersectionNode

public SegmentNode addIntersectionNode(Coordinate intPt,
                                       int segmentIndex)

Adds an intersection node for a given point and segment to this segment string. If an intersection already exists for this exact location, the existing node will be returned.

Parameters:

intPt - the location of the intersection

segmentIndex - the index of the segment containing the intersection

Returns:

the intersection node for the point

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object