ensemble

Class KnowledgeBase

java.lang.Object

ensemble.MusicalAgentComponent

ensemble.KnowledgeBase

All Implemented Interfaces:

LifeCycle, RouterClient

public class KnowledgeBase
extends MusicalAgentComponent

The Class KnowledgeBase.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
(package private) class	KnowledgeBase.EventFact The Class EventFact.
(package private) class	KnowledgeBase.Fact The Class Fact.

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.HashMap<java.lang.String,KnowledgeBase.Fact>	facts The facts.
private java.util.HashMap<java.lang.String,Memory>	memories The memories.

Fields inherited from class ensemble.MusicalAgentComponent

parameters

Constructor Summary

Constructors

Constructor and Description
KnowledgeBase()

Method Summary

Methods

Modifier and Type	Method and Description
Memory	createMemory(java.lang.String name, Parameters parameters) Creates the memory.
Memory	getMemory(java.lang.String name) Gets the memory.
java.lang.String	readFact(java.lang.String fact) Reads a fact from the Knowledge Base.
void	registerFact(java.lang.String fact, java.lang.String value, boolean isPublic) Registers a fact in the Knowledge Base.
boolean	start() Framework-implemented initialization method.
boolean	stop() Framework-implemented finalization method.
void	updateFact(java.lang.String fact, java.lang.String value) Updates the value of a fact in the Knowledge Base only if it exists.

Methods inherited from class ensemble.MusicalAgentComponent

addParameter, addParameters, configure, finit, getAddress, getAgent, getComponentName, getComponentType, getParameter, getParameter, getParameters, getState, getType, init, parameterUpdate, processCommand, receiveCommand, sendCommand, setAgent, setComponentName, setParameters, setState, setType

Methods inherited from class java.lang.Object

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

Field Detail

facts

private java.util.HashMap<java.lang.String,KnowledgeBase.Fact> facts

The facts.

memories

private java.util.HashMap<java.lang.String,Memory> memories

The memories.

Constructor Detail

KnowledgeBase

public KnowledgeBase()

Method Detail

start

public final boolean start()

Description copied from interface: LifeCycle

Framework-implemented initialization method.

Returns:

true, if successful

stop

public final boolean stop()

Description copied from interface: LifeCycle

Framework-implemented finalization method.

Returns:

true, if successful

registerFact

public void registerFact(java.lang.String fact,
                java.lang.String value,
                boolean isPublic)

Registers a fact in the Knowledge Base. If it already exists, than update it's value and visibility.

Parameters:

fact - the fact

value - the value

isPublic - the is public

updateFact

public void updateFact(java.lang.String fact,
              java.lang.String value)

Updates the value of a fact in the Knowledge Base only if it exists.

Parameters:

fact - the fact name.

value - teh new value of this fact.

readFact

public java.lang.String readFact(java.lang.String fact)

Reads a fact from the Knowledge Base.

Parameters:

fact - the fact name.

Returns:

the value of the fact. If the fact does not exist, then returns null.

createMemory

public Memory createMemory(java.lang.String name,
                  Parameters parameters)

Creates the memory.

Parameters:

name - the name

parameters - the parameters

Returns:

the memory

getMemory

public Memory getMemory(java.lang.String name)

Gets the memory.

Parameters:

name - the name

Returns:

the memory