com.revolsys.jts.noding

Class NodedSegmentString

java.lang.Object

com.revolsys.jts.noding.NodedSegmentString

All Implemented Interfaces:

NodableSegmentString, SegmentString

public class NodedSegmentString
extends Object
implements NodableSegmentString

Represents a list of contiguous line segments, and supports noding the segments. The line segments are represented by an array of Coordinatess. 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.

Version:

1.7

Constructor Summary

Constructors

Constructor and Description
NodedSegmentString(LineString points, Object data) Creates a new segment string from a list of vertices.

Method Summary

Methods

Modifier and Type	Method and Description
void	addIntersection(LineIntersector li, int segmentIndex, int geomIndex, int intIndex) Add an SegmentNode for intersection intIndex.
void	addIntersection(Point point, int segmentIndex) Adds an intersection node for a given point and segment to this segment string.
SegmentNode	addIntersectionNode(Point point, 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.
Point	getCoordinate(int i)
Object	getData() Gets the user-defined data for this segment string.
static List<NodedSegmentString>	getNodedSubstrings(Collection<NodedSegmentString> segments) Gets the SegmentStrings which result from splitting this string at node points.
SegmentNodeList	getNodeList()
LineString	getPoints()
int	getSegmentOctant(int index) Gets the octant of the segment starting at vertex index.
boolean	isClosed()
void	setData(Object data) Sets the user-defined data for this segment string.
int	size()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

NodedSegmentString

public NodedSegmentString(LineString points,
                  Object data)

Creates a new segment string from a list of vertices.

Parameters:

points - the vertices of the segment string

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

Method Detail

getNodedSubstrings

public static List<NodedSegmentString> getNodedSubstrings(Collection<NodedSegmentString> segments)

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

Parameters:

segments - a Collection of NodedSegmentStrings

Returns:

a Collection of NodedSegmentStrings representing the substrings

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(Point point,
                   int segmentIndex)

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

Specified by:

addIntersection in interface NodableSegmentString

Parameters:

point - the location of the intersection

segmentIndex - the index of the segment containing the intersection

addIntersectionNode

public SegmentNode addIntersectionNode(Point point,
                              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:

point - the location of the intersection

segmentIndex - the index of the segment containing the intersection

Returns:

the intersection node for the point

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.

getCoordinate

public Point getCoordinate(int i)

Specified by:

getCoordinate in interface SegmentString

getData

public Object getData()

Gets the user-defined data for this segment string.

Specified by:

getData in interface SegmentString

Returns:

the user-defined data

getNodeList

public SegmentNodeList getNodeList()

getPoints

public LineString getPoints()

Specified by:

getPoints 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

isClosed

public boolean isClosed()

Specified by:

isClosed in interface SegmentString

setData

public void setData(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

size

public int size()

Specified by:

size in interface SegmentString

toString

public String toString()

Overrides:

toString in class Object