org.mindswap.pellet

Class KBLoader

java.lang.Object

org.mindswap.pellet.KBLoader

Direct Known Subclasses:

KRSSLoader

public abstract class KBLoader
extends Object

A generic class that allows the creation of Pellet KnowledgeBase instances and load ontologies. The actual parsing and loading operations is implemented by the concrete extensions of this class where each implementation uses a different parser and loader, e.g. Jena or OWLAPI.

Loading to a KnowledgeBase instance is typically a two-phase process. First the ontology is parsed into a representation supported by the loader, e.g. Jena Model or OWLAPI Ontology. Then this object is processed by Pellet and loaded to the KnowledgeBase class.

This class provides fined-grained control over how parsing and loading is done along with a convenience function to do everything at once. Concrete implementations of this class provides access to the ontology object used by the underlying loader.

Author:

Evren Sirin

Field Summary

Fields

Modifier and Type	Field and Description
protected String	inputFormat
static Logger	log

Constructor Summary

Constructors

Constructor and Description
KBLoader()

Method Summary

Methods

Modifier and Type	Method and Description
abstract void	clear() Resets the loader and clear any previously loaded ontologies.
KnowledgeBase	createKB(String... fileNameList) Convenience function to clear, parse, load, and getKB().
abstract KnowledgeBase	getKB() Returns the KB instance associated with the loader.
abstract void	load() Load any previously parsed ontologies
void	parse(String... fileNames) Parse one or more files to the internal representation supported by this loader.
protected abstract void	parseFile(String fileURI) Parse a single file to the internal representation supported by this loader.
abstract void	setIgnoreImports(boolean valueAsBoolean) Instruct loader to respect or ignore imports.
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

log

public static final Logger log

inputFormat

protected String inputFormat

Constructor Detail

KBLoader

public KBLoader()

Method Detail

clear

public abstract void clear()

Resets the loader and clear any previously loaded ontologies.

createKB

public KnowledgeBase createKB(String... fileNameList)

Convenience function to clear, parse, load, and getKB(). Note: this method previously accepted a list of regular expressions instead of file URIs. This behavior has been changed as of 2.0.0-rc7.

Parameters:

fileNameList - list of file URIs

Returns:

KnowledgeBase instance with the given ontologies loaded

See Also:

FileUtils.getFileURIs(String...)

getKB

public abstract KnowledgeBase getKB()

Returns the KB instance associated with the loader. The function load() should be called beforehand.

Returns:

KnowledgeBase instance

load

public abstract void load()

Load any previously parsed ontologies

parse

public void parse(String... fileNames)

Parse one or more files to the internal representation supported by this loader. Note: this method previously accepted a list of regular expressions instead of file URIs. This behavior has been changed as of 2.0.0-rc7.

Parameters:

fileNameList - list of file URIs

See Also:

FileUtils.getFileURIs(String...)

setIgnoreImports

public abstract void setIgnoreImports(boolean valueAsBoolean)

Instruct loader to respect or ignore imports.

Parameters:

valueAsBoolean -

parseFile

protected abstract void parseFile(String fileURI)

Parse a single file to the internal representation supported by this loader.

Parameters:

fileURI - the URI of the file to be loaded

toString

public String toString()

Overrides:

toString in class Object