Package FAtiMA.Core.memory.semanticMemory

Class WorkingMemory

java.lang.Object

FAtiMA.Core.memory.semanticMemory.WorkingMemory

All Implemented Interfaces:

java.io.Serializable

public class WorkingMemory
extends java.lang.Object
implements java.io.Serializable

Implements a knowledge structure that stores properties and predicates about the world for current processes (new data or data retrieved from the knowledge base. Provides a very fast method of searching for the information stored inside it. This structure also provides a limited kind of Logical Inference that can be applied to generate new properties and predicates. This logical inference is performed by specific inference operators that must be explicitly added to the WM. When the WM buffer is full, data will be transfer to the KnowledgeBase (LTM) based on first in first out mechanism.

Author:

Meiyii Lim

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static short	MAXENTRY

Constructor Summary

Constructors

Constructor	Description
WorkingMemory()	Creates a new Empty WorkingMemory

Method Summary

Modifier and Type	Method	Description
java.lang.Object	Ask(Name name)
void	Clear()	Empties the WorkingMemory
void	ClearChangeList()
int	Count()
java.util.ArrayList<KnowledgeSlot>	GetChangeList()
java.util.ArrayList<KnowledgeSlot>	GetFactList()
java.util.ArrayList<KnowledgeSlot>	GetNewFacts()
KnowledgeSlot	GetObjectDetails(java.lang.String objectName)
KnowledgeSlot	GetObjectProperty(java.lang.String objectName, java.lang.String property)
java.util.ArrayList<SubstitutionSet>	GetPossibleBindings(Name name)
boolean	HasNewKnowledge()	Gets a value that indicates whether new Knowledge has been added to the WorkingMemory since the last inference process
void	putFact(KnowledgeSlot ks)
void	RearrangeWorkingMemory(Name predicate, java.lang.Object value)	Rearrange the working memory entries so that the most current accessed entry comes last
void	ResetNewKnowledge()
void	Retract(Name predicate)	Removes a predicate from the WorkingMemory
void	Tell(KnowledgeBase kb, Name property, java.lang.Object value)	Adds a new property or sets its value (if already exists) in the WorkingMemory
java.lang.String	toString()	Converts the Information stored in the WM to one String
java.lang.String	toXML()

Methods inherited from class java.lang.Object

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

Field Detail

MAXENTRY

public static final short MAXENTRY

See Also:

Constant Field Values

Constructor Detail

WorkingMemory

public WorkingMemory()

Creates a new Empty WorkingMemory

Method Detail

Ask

public java.lang.Object Ask(Name name)

Clear

public void Clear()

Empties the WorkingMemory

ClearChangeList

public void ClearChangeList()

Count

public int Count()

GetChangeList

public java.util.ArrayList<KnowledgeSlot> GetChangeList()

GetFactList

public java.util.ArrayList<KnowledgeSlot> GetFactList()

GetNewFacts

public java.util.ArrayList<KnowledgeSlot> GetNewFacts()

putFact

public void putFact(KnowledgeSlot ks)

HasNewKnowledge

public boolean HasNewKnowledge()

Gets a value that indicates whether new Knowledge has been added to the WorkingMemory since the last inference process

Returns:

true if there is new Knowledge in the WM, false otherwise

RearrangeWorkingMemory

public void RearrangeWorkingMemory(Name predicate,
                                   java.lang.Object value)

Rearrange the working memory entries so that the most current accessed entry comes last

ResetNewKnowledge

public void ResetNewKnowledge()

Retract

public void Retract(Name predicate)

Removes a predicate from the WorkingMemory

Parameters:

predicate - - the predicate to be removed

Tell

public void Tell(KnowledgeBase kb,
                 Name property,
                 java.lang.Object value)

Adds a new property or sets its value (if already exists) in the WorkingMemory

Parameters:

property - - the property to be added/changed

value - - the value to be stored in the property

GetPossibleBindings

public java.util.ArrayList<SubstitutionSet> GetPossibleBindings(Name name)

GetObjectDetails

public KnowledgeSlot GetObjectDetails(java.lang.String objectName)

GetObjectProperty

public KnowledgeSlot GetObjectProperty(java.lang.String objectName,
                                       java.lang.String property)

toString

public java.lang.String toString()

Converts the Information stored in the WM to one String

Overrides:

toString in class java.lang.Object

Returns:

the converted String

toXML

public java.lang.String toXML()