Package org.goplanit.assignment.ltm.sltm

Class StaticLtmBushStrategy

java.lang.Object

org.goplanit.assignment.ltm.sltm.StaticLtmAssignmentStrategy

org.goplanit.assignment.ltm.sltm.StaticLtmBushStrategy

public class StaticLtmBushStrategy
extends StaticLtmAssignmentStrategy

Implementation to support a bush absed solution for sLTM

Author:

markr

Constructor Summary

Constructors

Constructor	Description
StaticLtmBushStrategy(IdGroupingToken idGroupingToken, long assignmentId, TransportModelNetwork transportModelNetwork, StaticLtmSettings settings, TrafficAssignmentComponentAccessee taComponents)	Constructor

Method Summary

Modifier and Type	Method	Description
void	createInitialSolution(double[] initialLinkSegmentCosts)	Create initial bushes, where for each origin the bush is initialised with the shortest path only
protected StaticLtmLoadingBush	createNetworkLoading()	Create bush based network loading implementation
String	getDescription()	Description of the chosen sLTM strategy for equilibration
protected StaticLtmLoadingBush	getLoading()	The network loading to apply
boolean	performIteration(Mode theMode, double[] costsToUpdate, int iterationIndex)	Perform an iteration by: 1.

Methods inherited from class org.goplanit.assignment.ltm.sltm.StaticLtmAssignmentStrategy

executeNetworkCostsUpdate, executeNetworkLoading, getAssignmentId, getIdGroupingToken, getInfrastructureNetwork, getOdDemands, getSettings, getTrafficAssignmentComponent, getTransportNetwork, setOdDemands, updateTimePeriod, verifyNetworkLoadingConvergenceProgress

Methods inherited from class java.lang.Object

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

Constructor Detail

StaticLtmBushStrategy

public StaticLtmBushStrategy(IdGroupingToken idGroupingToken,
                             long assignmentId,
                             TransportModelNetwork transportModelNetwork,
                             StaticLtmSettings settings,
                             TrafficAssignmentComponentAccessee taComponents)

Constructor

Parameters:

idGroupingToken - to use for internal managed ids

assignmentId - of parent assignment

transportModelNetwork - to use

settings - to use

taComponents - to use for access to user configured assignment components

Method Detail

createNetworkLoading

protected StaticLtmLoadingBush createNetworkLoading()

Create bush based network loading implementation

Specified by:

createNetworkLoading in class StaticLtmAssignmentStrategy

Returns:

created loading implementation supporting bush-based approach

getLoading

protected StaticLtmLoadingBush getLoading()

The network loading to apply

Overrides:

getLoading in class StaticLtmAssignmentStrategy

Returns:

network loading

createInitialSolution

public void createInitialSolution(double[] initialLinkSegmentCosts)

Create initial bushes, where for each origin the bush is initialised with the shortest path only

Specified by:

createInitialSolution in class StaticLtmAssignmentStrategy

Parameters:

initialLinkSegmentCosts - costs to use

performIteration

public boolean performIteration(Mode theMode,
                                double[] costsToUpdate,
                                int iterationIndex)

Perform an iteration by: 1. Identify new PASs and shift flow from affected bushes 2. Conduct another loading update based on adjusted PASs and bushes 3. Update Bushes by shifting flow between existing PASs 4. Conducting a loading to obtain network costs

Specified by:

performIteration in class StaticLtmAssignmentStrategy

Parameters:

theMode - to use

costsToUpdate - to place updated costs in (output)

iterationIndex - we're at

Returns:

true when iteration could be successfully completed, false otherwise

getDescription

public String getDescription()

Description of the chosen sLTM strategy for equilibration

Specified by:

getDescription in class StaticLtmAssignmentStrategy

Returns:

String