org.geotools.graph.build.line
Class LineStringGraphGenerator

Object
  BasicLineGraphGenerator
      LineStringGraphGenerator

All Implemented Interfaces:

GraphGenerator, LineGraphGenerator

Direct Known Subclasses:

DirectedLineStringGraphGenerator

public class LineStringGraphGenerator
extends BasicLineGraphGenerator

Builds a graph representing a line network in which edges in the network are represented by LineString geometries. This implementation is a wrapper around a LineGraphGenerator which sets underlying edge objects to be LineString objects, and underlying Node objects to be Point objects. While generating the graph, the generator uses the visited flag of created components to determine when to create underlying objects. For this reason it is not recommended to modify the visited flag of any graph components.

Author:

Justin Deoliveira, Refractions Research Inc, jdeolive@refractions.net, Anders Bakkevold, Bouvet AS, bakkedev@gmail.com

See Also:

LineString, Point

Constructor Summary

LineStringGraphGenerator()

LineStringGraphGenerator(double tolerance)

Method Summary

Graphable	add(Object obj) Adds a line to the graph.
protected LineSegment	alterLine(LineSegment line, Node n1, Node n2)
Graphable	get(Object obj) Returns the edge which represents a line.
Graphable	remove(Object obj) Removes the edge from the graph that represents a line.
protected void	setObject(Node n, Object obj)

Methods inherited from class BasicLineGraphGenerator

getEdge, getGraph, getGraphBuilder, getNode, getNodeMap, setGraphBuilder, setObject, useTolerance

Methods inherited from class Object

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

Constructor Detail

LineStringGraphGenerator

public LineStringGraphGenerator(double tolerance)

LineStringGraphGenerator

public LineStringGraphGenerator()

Method Detail

add

public Graphable add(Object obj)

Description copied from class: BasicLineGraphGenerator

Adds a line to the graph.

Specified by:

add in interface GraphGenerator

Overrides:

add in class BasicLineGraphGenerator

Parameters:

obj - An instance of LineSegment.

Returns:

A BasicEdge.

See Also:

LineSegment, GraphGenerator.add(Object)

alterLine

protected LineSegment alterLine(LineSegment line,
                                Node n1,
                                Node n2)

Overrides:

alterLine in class BasicLineGraphGenerator

remove

public Graphable remove(Object obj)

Description copied from class: BasicLineGraphGenerator

Removes the edge from the graph that represents a line.

Specified by:

remove in interface GraphGenerator

Overrides:

remove in class BasicLineGraphGenerator

Parameters:

obj - The object modelled by the component.

Returns:

Edge that represents the line.

See Also:

GraphGenerator.remove(Object)

get

public Graphable get(Object obj)

Description copied from class: BasicLineGraphGenerator

Returns the edge which represents a line. Note that if the exact same line has been added to the graph multiple times, then only one of the edges that represents it will be returned. It is undefined which edge will be returned.

Specified by:

get in interface GraphGenerator

Overrides:

get in class BasicLineGraphGenerator

Parameters:

obj - An instance of LineSegment.

Returns:

Edge that represents the line.

See Also:

GraphGenerator.get(Object)

setObject

protected void setObject(Node n,
                         Object obj)

Overrides:

setObject in class BasicLineGraphGenerator