gate.creole.ontology
Interface OValue

public interface OValue

A class representing something that is either a literal or a OResource.

Developer note: ideally this would be implemented as a superinteface of the Literal and OResource interfaces, but Literal is implemented as a class and has to remain a class for backwards compatibility.löschnaz

Author:

Johann Petrak

Method Summary

boolean	equals(Object other)
Literal	getLiteral() Get the Literal object if this object represents a literal.
OResource	getOResource() Get the OResource object if this object represents a resource.
int	hashCode()
boolean	isLiteral() Check if the object represents a literal.
boolean	isOResource() Check if the object represents a OResource
String	toString()
String	toTurtle() Create a String representation that conforms to Turtle language syntax.

Method Detail

isLiteral

boolean isLiteral()

Check if the object represents a literal.

Returns:

true if the object represents a literal value, false if it represents a blank node ID or an URI.

isOResource

boolean isOResource()

Check if the object represents a OResource

Returns:

true if the object represents a OResource object

getOResource

OResource getOResource()

Get the OResource object if this object represents a resource. Throws a GateOntologyException if this object represents a literal.

Returns:

the OResource represented by this object

getLiteral

Literal getLiteral()

Get the Literal object if this object represents a literal. Throws a GateOntologyException if this object represents a node ID.

Returns:

the Literal represented by this object

toString

String toString()

Overrides:

toString in class Object

toTurtle

String toTurtle()

Create a String representation that conforms to Turtle language syntax. If this represents a OResource it is identical to OResource.toString()

Returns:

a string representation of the node id or literal following Turtle syntax.

hashCode

int hashCode()

Overrides:

hashCode in class Object

equals

boolean equals(Object other)

Overrides:

equals in class Object