Module org.jgrapht.core

Package org.jgrapht.alg.matching.blossom.v5

Class BlossomVOptions

java.lang.Object

org.jgrapht.alg.matching.blossom.v5.BlossomVOptions

public class BlossomVOptions
extends Object

BlossomVOptions that define the strategies to use during the algorithm for updating duals and initializing the matching

According to the experimental results, the greedy initialization substantially speeds up the algorithm.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	BlossomVOptions.DualUpdateStrategy	Enum for choosing dual updates strategy
static class	BlossomVOptions.InitializationType	Enum for types of matching initialization

Field Summary

Fields

Modifier and Type	Field	Description
static BlossomVOptions[]	ALL_OPTIONS	All possible options

Constructor Summary

Constructors

Constructor	Description
BlossomVOptions()	Constructs a default set of options for the algorithm
BlossomVOptions(BlossomVOptions.InitializationType initializationType)	Constructs a new options instance with a initializationType
BlossomVOptions(BlossomVOptions.InitializationType initializationType, BlossomVOptions.DualUpdateStrategy dualUpdateStrategy, boolean updateDualsBefore, boolean updateDualsAfter)	Constructs a custom set of options for the algorithm

Method Summary

Modifier and Type	Method	Description
BlossomVOptions.DualUpdateStrategy	getDualUpdateStrategy()	Returns dual updates strategy
BlossomVOptions.InitializationType	getInitializationType()	Returns initialization type
boolean	isUpdateDualsAfter()	Returns the updateDualsAfter flag
boolean	isUpdateDualsBefore()	Returns the updateDualsBefore flag
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

ALL_OPTIONS

public static final BlossomVOptions[] ALL_OPTIONS

All possible options

Constructor Detail

BlossomVOptions

public BlossomVOptions(BlossomVOptions.InitializationType initializationType,
                       BlossomVOptions.DualUpdateStrategy dualUpdateStrategy,
                       boolean updateDualsBefore,
                       boolean updateDualsAfter)

Constructs a custom set of options for the algorithm

Parameters:

dualUpdateStrategy - greedy strategy to update dual variables globally

initializationType - strategy for initializing the matching

updateDualsBefore - whether to update duals of the tree before growth

updateDualsAfter - whether to update duals of the tree after growth

BlossomVOptions

public BlossomVOptions(BlossomVOptions.InitializationType initializationType)

Constructs a new options instance with a initializationType

Parameters:

initializationType - defines a strategy to use to initialize the matching

BlossomVOptions

public BlossomVOptions()

Constructs a default set of options for the algorithm

Method Detail

toString

public String toString()

Overrides:

toString in class Object

isUpdateDualsBefore

public boolean isUpdateDualsBefore()

Returns the updateDualsBefore flag

Returns:

the flag updateDualsBefore

isUpdateDualsAfter

public boolean isUpdateDualsAfter()

Returns the updateDualsAfter flag

Returns:

the flag updateDualsAfter

getDualUpdateStrategy

public BlossomVOptions.DualUpdateStrategy getDualUpdateStrategy()

Returns dual updates strategy

Returns:

dual updates strategy

getInitializationType

public BlossomVOptions.InitializationType getInitializationType()

Returns initialization type

Returns:

initialization type