cz.cuni.amis.pogamut.sposh.elements

Class DriveCollection

java.lang.Object

cz.cuni.amis.pogamut.sposh.elements.PoshElement<THIS,PARENT>

cz.cuni.amis.pogamut.sposh.elements.PoshDummyElement<THIS,PARENT>

cz.cuni.amis.pogamut.sposh.elements.NamedLapElement<DriveCollection,PoshPlan>

cz.cuni.amis.pogamut.sposh.elements.DriveCollection

public final class DriveCollection
extends NamedLapElement<DriveCollection,PoshPlan>

This is root of POSH plan in execution sense. In source of POSH plan, this is leaf of root. Every POSH plan can have only one DriveCollection.

drive collection: this is the root of the POSH hierarchy, and on every POSH action-selection cycle, this reconsiders which goal the agent should be working on. This is how a BOD agent can respond rapidly to changes in the environment.

How does it work? Fact: Engine remembers which node of the drive it processed last time. When engine evaluates the drive, it starts evaluation in the place, where it left off in the last evaluation of drive. Engine evaluates the plan each tick, but it doesn't matter if drive was evaluated in previsous tick or 10000 ticks ago (e.g. trigger of the drive was unsatisfied for a long time), engine will take the state (state=path from the drive to some node in the drive tree) it was left off last time and goes from there, e.g. if drive was evaluating which action it should do, it will continue to do so, if drive was executing some action, it will continue in its execution.

By "will continue in..." is meant "will try to continue...", because in many cases, it will fail(the action will signal its failure ect.), but it doesn't matter, in such case the engine will traverse the drive's decision tree from the root. Originally it was supposed to enable quick switch to some action and go back to doing whatever the original drive was doing. Not sure about how useful it is.

Author:

HonzaH

See Also:

Competences are similar, but slightly different. There is a lot of confusion about how they differ from DC, so take a look.

Field Summary

Fields

Modifier and Type	Field and Description
static DataFlavor	dataFlavor Data flavor of DC, used for drag and drop
static String	dcName Property name for change of name.

Fields inherited from class cz.cuni.amis.pogamut.sposh.elements.PoshDummyElement

IDENT_PATTERN

Method Summary

Methods

Modifier and Type	Method and Description
void	addDrive(DriveElement drive) Add passed drive as the last drive of this DC and emit new it.
void	addDrive(int index, DriveElement drive)
List<PoshElement>	getChildDataNodes() Get all child nodes of the DC.
DataFlavor	getDataFlavor() Get data flavour of posh plan element,used during DnD from palette to PoshScene.
List<DriveElement>	getDrives() Get list of all drives of this DC in correct order (drive with higest priority is first, drive with lowest priority is last).
Trigger<DriveCollection>	getGoal() Get goal of the DC.
String	getName() Get name of the DC
boolean	moveChild(int newIndex, PoshElement child) Move child to the @newIndex.
void	removeDrive(DriveElement drive) Remove drive from the drive collection.
void	setName(String newName) Change name of the DC and notify property listeners.
String	toString() Serialize DC into a parser readable form.

Methods inherited from class cz.cuni.amis.pogamut.sposh.elements.PoshDummyElement

getUnusedName, isUsedName, moveChildInList

Methods inherited from class cz.cuni.amis.pogamut.sposh.elements.PoshElement

addElementListener, emitChildDeleted, emitChildMove, emitChildNode, firePropertyChange, getElementListeners, getNumberOfChildInstances, getParent, getRootNode, isChildOfParent, removeElementListener, setParent

Methods inherited from class java.lang.Object

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

Field Detail

dcName

public static final String dcName

Property name for change of name.

See Also:

Constant Field Values

dataFlavor

public static final DataFlavor dataFlavor

Data flavor of DC, used for drag and drop

Method Detail

addDrive

public void addDrive(DriveElement drive)
              throws DuplicateNameException

Add passed drive as the last drive of this DC and emit new it.

Parameters:

drive - drive to add

Throws:

DuplicateNameException

addDrive

public void addDrive(int index,
            DriveElement drive)
              throws DuplicateNameException

Throws:

DuplicateNameException

getGoal

public Trigger<DriveCollection> getGoal()

Get goal of the DC. As long as goal is not satisfied, the DC will go on.

Returns:

goal of the DC

getDrives

public List<DriveElement> getDrives()

Get list of all drives of this DC in correct order (drive with higest priority is first, drive with lowest priority is last).

Returns:

unmodifiable list of drives.

toString

public String toString()

Serialize DC into a parser readable form. If goal is empty, don't include it. Example: (DC funbot (goal ((cz.cuni.HaveFun)(cz.cuni.Sing))) (drives ( (fun (trigger ((cz.cuni.IsAtParty)(cz.cuni.FriendsInSight)) ) cz.cuni.Enjoy ) (default cz.cuni.DoNothing) ) ) )

Overrides:

toString in class Object

Returns:

multi-line string that parser can read.

getChildDataNodes

public List<PoshElement> getChildDataNodes()

Get all child nodes of the DC. It consists of goal (at first place) and all drives of DC from second place forward (in correct order).

Specified by:

getChildDataNodes in class PoshElement<DriveCollection,PoshPlan>

Returns:

all children of this DC,

getName

public String getName()

Get name of the DC

Specified by:

getName in class NamedLapElement<DriveCollection,PoshPlan>

Returns:

name of the DC

setName

public void setName(String newName)
             throws InvalidNameException

Change name of the DC and notify property listeners.

Parameters:

newName - New name of the DC.

Throws:

InvalidNameException - throw if name is not valid (spaces, braces...)

moveChild

public boolean moveChild(int newIndex,
                PoshElement child)

Description copied from class: PoshElement

Move child to the @newIndex. After child was moved (if it was moved), notify listeners.

Specified by:

moveChild in class PoshElement<DriveCollection,PoshPlan>

Returns:

if node succesfully moved

getDataFlavor

public DataFlavor getDataFlavor()

Description copied from class: PoshElement

Get data flavour of posh plan element,used during DnD from palette to PoshScene.

Specified by:

getDataFlavor in class PoshElement<DriveCollection,PoshPlan>

Returns:

dataFlavour of posh plan element, never null.

removeDrive

public void removeDrive(DriveElement drive)

Remove drive from the drive collection. If it is the last drive of DC, create new one before removing passed drive in order to have at least one drive in DC at all times.

Parameters:

drive - Drive to be removed.