org.tinfour.common

Class VertexMergerGroup

java.lang.Object

org.tinfour.common.Vertex

org.tinfour.common.VertexMergerGroup

All Implemented Interfaces:

ISamplePoint

public class VertexMergerGroup
extends Vertex

A synthetic vertex used to handle cases when multiple vertices occupy coincident locations.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	VertexMergerGroup.ResolutionRule Specifies a rule for determining a z value based on the collection of coincident vertices.

Field Summary

Fields inherited from class org.tinfour.common.Vertex

auxiliary, BIT_CONSTRAINT, BIT_SYNTHETIC, reserved0, reserved1, status, x, y

Constructor Summary

Constructors

Constructor and Description
VertexMergerGroup(Vertex firstVertex) Constructs a coincident vertex using the specified vertex for initialization.

Method Summary

Modifier and Type	Method and Description
boolean	addVertex(Vertex v) Add a new vertex to the coincident collection.
boolean	contains(Vertex v) Indicates whether the group contains the specified vertex
int	getSize() Gets the number of vertices grouped together in the collection
Vertex[]	getVertices() Gets an array of the coincident vertices.
double	getZ() Get the z value associated with the vertex and the merging rules.
boolean	removeVertex(Vertex v) Removes the specified vertex from the group.
void	setAuxiliaryIndex(int auxiliaryIndex) Sets the color index for the vertex.
void	setResolutionRule(VertexMergerGroup.ResolutionRule rule) Sets the rule for resolving coincident vertices; recalculates value for vertex if necessary

Methods inherited from class org.tinfour.common.Vertex

getAuxiliaryIndex, getDistance, getDistance, getDistanceSq, getDistanceSq, getIndex, getLabel, getStatus, getX, getY, isConstraintMember, isNull, isSynthetic, setConstraintMember, setIndex, setStatus, setSynthetic, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

VertexMergerGroup

public VertexMergerGroup(Vertex firstVertex)

Constructs a coincident vertex using the specified vertex for initialization.

Parameters:

firstVertex - a valid instance

Method Detail

addVertex

public boolean addVertex(Vertex v)

Add a new vertex to the coincident collection. Recompute z value using current rule.

Parameters:

v - a valid, unique instance

Returns:

true if added to collection; otherwise false

removeVertex

public boolean removeVertex(Vertex v)

Removes the specified vertex from the group. If the vertex is not currently a member of the group, this operation will be ignored.

Parameters:

v - the vertex to be removed.

Returns:

true if the vertex was a member of the group and was removed; otherwise, false.

setResolutionRule

public void setResolutionRule(VertexMergerGroup.ResolutionRule rule)

Sets the rule for resolving coincident vertices; recalculates value for vertex if necessary

Parameters:

rule - a valid member of the enumeration

getZ

public double getZ()

Get the z value associated with the vertex and the merging rules. If the vertex is null, the return value for this method is Double.NaN ("not a number").

Specified by:

getZ in interface ISamplePoint

Overrides:

getZ in class Vertex

Returns:

a floating point value or Double.NaN if z value is null.

getVertices

public Vertex[] getVertices()

Gets an array of the coincident vertices. Each invocation of this method results in a new instance of the array.

Returns:

a valid array of size 1 or greater.

getSize

public int getSize()

Gets the number of vertices grouped together in the collection

Returns:

normally, a value of 1 or greater; but if the last vertex in the group has been removed, a value of zero.

contains

public boolean contains(Vertex v)

Indicates whether the group contains the specified vertex

Parameters:

v - a valid vertex

Returns:

true if the vertex is a member of the group; otherwise, false.

setAuxiliaryIndex

public void setAuxiliaryIndex(int auxiliaryIndex)

Sets the color index for the vertex. The color index field is provided in support of graph-coloring algorithms. Values in the range 0 to 255 are supported.

This method will set the color index for all vertices contain within the merger group.

Overrides:

setAuxiliaryIndex in class Vertex

Parameters:

auxiliaryIndex - a value in the range 0 to 255