agent.core.memory
Class Memory

java.lang.Object
  agent.core.memory.Memory

public class Memory
extends java.lang.Object

Agent Memory Main functionality to access and manipulate Jena ontology models in MySQL database

Version:

0.8

Author:

Michal Laclavik, Emil Gatial (inference, connection testing)

Field Summary

(package private) Config	config
private IDBConnection	conn Instanceof database connection object
private static java.lang.String	DEFAULT_MODEL_NAME Default ontology model name
private boolean	loaded State variable identifies whether model is loaded
private Logger	log Log4j object
private OntModel	model Instance of ontological model used in agent

Constructor Summary

Memory(java.lang.String _propertyFile, java.lang.String _agentName)
Constructor

Method Summary

void	closeModel() Close OWL Model and store Model in RDB if using database backend This have to be redesigned and store everything on the crash
void	createModel() Creates OWL model out of defined SOURCE_FILE in OWL database and store this model see: SOURCE_FILE, INDIVIDUALS_FILE
Property	createProperty(java.lang.String property) Creates ontology property out ofstring represenation
static java.lang.String	getBase() Reurns the agent onoloy name space
IDBConnection	getConnection() This method returns db connection
OntModel	getModel() Returns OWL ontological model for manipulation
void	memory2owl() Saves current content of Memory into file defined in Ontology Property file see: OUTPUT_FILE
void	performInference(java.lang.String ruleFile, boolean derivationLogging) Infers some new statements about the agent ontological model accoding to given rules of inference and adds inferenced model as submodel of agent
void	removeModel() Remove model from DB
void	reset() Sometimes if operation is idle MySQL connection fails and we need to reset connection and model
void	test() Prints objects from OWL model for testing purposes
void	testConnection() Tests the status of connection.

Methods inherited from class java.lang.Object

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

Field Detail

config

Config config

DEFAULT_MODEL_NAME

private static final java.lang.String DEFAULT_MODEL_NAME

Default ontology model name

See Also:

Constant Field Values

log

private Logger log

Log4j object

conn

private IDBConnection conn

Instanceof database connection object

model

private OntModel model

Instance of ontological model used in agent

loaded

private boolean loaded

State variable identifies whether model is loaded

Constructor Detail

Memory

public Memory(java.lang.String _propertyFile,
              java.lang.String _agentName)

Constructor

Parameters:

_propertyFile - - property file name where settings for agent memory are stored. Settings are defined according to memory.Config

_agentName - name of the agent

Method Detail

getBase

public static java.lang.String getBase()

Reurns the agent onoloy name space

Returns:

name space of agent

getConnection

public IDBConnection getConnection()

This method returns db connection

Returns:

instance of db connection object

createModel

public void createModel()

Creates OWL model out of defined SOURCE_FILE in OWL database and store this model see: SOURCE_FILE, INDIVIDUALS_FILE

removeModel

public void removeModel()

Remove model from DB

getModel

public OntModel getModel()

Returns OWL ontological model for manipulation

Returns:

ontological model

performInference

public void performInference(java.lang.String ruleFile,
                             boolean derivationLogging)

Infers some new statements about the agent ontological model accoding to given rules of inference
and adds inferenced model as submodel of agent

Parameters:

ruleFile - path to file with line delimited list of rules

derivationLogging - true/false value indicates whether to perform logging of inferenced statements
false value accelerate inferece processing

See Also:

setDerivationLogging

reset

public void reset()

Sometimes if operation is idle MySQL connection fails and we need to reset connection and model

test

public void test()

Prints objects from OWL model for testing purposes

memory2owl

public void memory2owl()

Saves current content of Memory into file defined in Ontology Property file see: OUTPUT_FILE

closeModel

public void closeModel()

Close OWL Model and store Model in RDB if using database backend This have to be redesigned and store everything on the crash

createProperty

public Property createProperty(java.lang.String property)

Creates ontology property out ofstring represenation

Parameters:

property - represents local name of ontology property

testConnection

public void testConnection()

Tests the status of connection. If it doesn't exist then make new connection to database and initialize model