uk.ac.manchester.cs.owl.owlapi

Class OWLLiteralImpl

java.lang.Object

uk.ac.manchester.cs.owl.owlapi.OWLObjectImpl

uk.ac.manchester.cs.owl.owlapi.OWLLiteralImpl

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<OWLObject>, OWLAnnotationObject, OWLAnnotationValue, OWLLiteral, OWLObject, OWLPropertyAssertionObject

public class OWLLiteralImpl
extends OWLObjectImpl
implements OWLLiteral

Author: Matthew Horridge
The University Of Manchester
Bio-Health Informatics Group
Date: 26-Oct-2006

Implementation of OWLLiteral that uses compression of strings. See also OWLLiteralImplNoCompression

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
OWLLiteralImpl(java.lang.String literal, java.lang.String lang, OWLDatatype datatype)

Method Summary

Methods

Modifier and Type	Method and Description
void	accept(OWLAnnotationValueVisitor visitor)
<O> O	accept(OWLAnnotationValueVisitorEx<O> visitor)
void	accept(OWLDataVisitor visitor)
<O> O	accept(OWLDataVisitorEx<O> visitor)
void	accept(OWLObjectVisitor visitor)
<O> O	accept(OWLObjectVisitorEx<O> visitor)
protected int	compareObjectOfSameType(OWLObject object)
boolean	equals(java.lang.Object obj)
OWLDatatype	getDatatype() Gets the OWLDatatype which types this literal.
java.lang.String	getLang() Gets the language tag of this literal.
java.lang.String	getLiteral() Gets the lexical value of this literal.
int	hashCode()
boolean	hasLang() Determines if this literal has a language tag.
boolean	hasLang(java.lang.String l) Determines if this OWLLiteral has a particular language tag.
boolean	isBoolean() Determines if this literal is typed with a datatype that has an IRI that is "http://www.w3.org/2001/XMLSchema#"boolean.
boolean	isDouble() Determines if this literal is typed with a datatype that has an IRI that is "http://www.w3.org/2001/XMLSchema#"double.
boolean	isFloat() Determines if this literal is typed with a datatype that has an IRI that is "http://www.w3.org/2001/XMLSchema#"float.
boolean	isInteger() Determines if this literal is typed with a datatype that has an IRI that is "http://www.w3.org/2001/XMLSchema#"integer.
boolean	isRDFPlainLiteral() Determines if the datatype of this literal is rdf:PlainLiteral.
boolean	parseBoolean() Parses the lexical value of this literal into a boolean.
double	parseDouble() Parses the lexical value of this literal into a double.
float	parseFloat() Parses the lexical value of this literal into a float.
int	parseInteger() Parses the lexical value of this literal into an integer.

Methods inherited from class uk.ac.manchester.cs.owl.owlapi.OWLObjectImpl

compareLists, compareSets, compareTo, getAnonymousIndividuals, getClassesInSignature, getDataPropertiesInSignature, getDatatypesInSignature, getIndividualsInSignature, getNestedClassExpressions, getObjectPropertiesInSignature, getOWLDataFactory, getSignature, isBottomEntity, isTopEntity, setOWLDataFactory, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.semanticweb.owlapi.model.OWLObject

getAnonymousIndividuals, getClassesInSignature, getDataPropertiesInSignature, getDatatypesInSignature, getIndividualsInSignature, getNestedClassExpressions, getObjectPropertiesInSignature, getSignature, isBottomEntity, isTopEntity

Methods inherited from interface java.lang.Comparable

compareTo

Constructor Detail

OWLLiteralImpl

public OWLLiteralImpl(java.lang.String literal,
              java.lang.String lang,
              OWLDatatype datatype)

Parameters:

literal - the lexical form

lang - the language; can be null or an empty string, in which case datatype can be any datatype but not null

datatype - the datatype; if lang is null or the empty string, it can be null or it MUST be RDFPlainLiteral

Method Detail

getLiteral

public java.lang.String getLiteral()

Description copied from interface: OWLLiteral

Gets the lexical value of this literal. Note that if the datatype is rdf:PlainLiteral then the abbreviated lexical form will be returned. That is, the language tag is not included.

Specified by:

getLiteral in interface OWLLiteral

Returns:

The lexical value of this literal. If the datatype is rdf:PlainLiteral then the return values are as follows: If the literal is of the form "abc@"^^rdf:PlainLiteral then the return value will be "abc" (without the language tag included). If the literal is of the form "abc@langTag"^^rdf:PlainLiteral then the return value will be "abc" (without the language tag included).

isRDFPlainLiteral

public boolean isRDFPlainLiteral()

Description copied from interface: OWLLiteral

Determines if the datatype of this literal is rdf:PlainLiteral. Note that literals that are abbreviated in the functional syntax (and other concrete syntaxes) and are of the form "abc" or "abc"@langTag will be of the type rdf:PlainLiteral after parsing.

Specified by:

isRDFPlainLiteral in interface OWLLiteral

Returns:

true if the datatype of this literal is rdf:PlainLiteral, otherwise false.

hasLang

public boolean hasLang()

Description copied from interface: OWLLiteral

Determines if this literal has a language tag.

Specified by:

hasLang in interface OWLLiteral

Returns:

true if this literal has a non-empty language tag, otherwise false

isInteger

public boolean isInteger()

Description copied from interface: OWLLiteral

Determines if this literal is typed with a datatype that has an IRI that is "http://www.w3.org/2001/XMLSchema#"integer.

Specified by:

isInteger in interface OWLLiteral

Returns:

true if this literal is typed with "http://www.w3.org/2001/XMLSchema#"integer, i.e. this literal represents an integer, otherwise false.

parseInteger

public int parseInteger()
                 throws java.lang.NumberFormatException

Description copied from interface: OWLLiteral

Parses the lexical value of this literal into an integer. The lexical value of this literal should be in the lexical space of the integer datatype ("http://www.w3.org/2001/XMLSchema#"integer)

Specified by:

parseInteger in interface OWLLiteral

Returns:

An integer value that is represented by this literal.

Throws:

java.lang.NumberFormatException - if the lexical form could not be parsed into an integer because it is not in the lexical space of the integer datatype.

isBoolean

public boolean isBoolean()

Description copied from interface: OWLLiteral

Determines if this literal is typed with a datatype that has an IRI that is "http://www.w3.org/2001/XMLSchema#"boolean.

Specified by:

isBoolean in interface OWLLiteral

Returns:

true if this literal is typed with "http://www.w3.org/2001/XMLSchema#"boolean, i.e. this literal represents a boolean, otherwise false.

parseBoolean

public boolean parseBoolean()
                     throws java.lang.NumberFormatException

Description copied from interface: OWLLiteral

Parses the lexical value of this literal into a boolean. The lexical value of this literal should be in the lexical space of the boolean datatype ("http://www.w3.org/2001/XMLSchema#"boolean).

Specified by:

parseBoolean in interface OWLLiteral

Returns:

A boolean value that is represented by this literal.

Throws:

java.lang.NumberFormatException - if the lexical form could not be parsed into a boolean because it is not in the lexical space of the boolean datatype.

isDouble

public boolean isDouble()

Description copied from interface: OWLLiteral

Determines if this literal is typed with a datatype that has an IRI that is "http://www.w3.org/2001/XMLSchema#"double.

Specified by:

isDouble in interface OWLLiteral

Returns:

true if this literal is typed with "http://www.w3.org/2001/XMLSchema#"double, i.e. this literal represents a double, otherwise false.

parseDouble

public double parseDouble()
                   throws java.lang.NumberFormatException

Description copied from interface: OWLLiteral

Parses the lexical value of this literal into a double. The lexical value of this literal should be in the lexical space of the double datatype ("http://www.w3.org/2001/XMLSchema#"double).

Specified by:

parseDouble in interface OWLLiteral

Returns:

A double value that is represented by this literal.

Throws:

java.lang.NumberFormatException - if the lexical form could not be parsed into a double because it is not in the lexical space of the double datatype.

isFloat

public boolean isFloat()

Description copied from interface: OWLLiteral

Determines if this literal is typed with a datatype that has an IRI that is "http://www.w3.org/2001/XMLSchema#"float.

Specified by:

isFloat in interface OWLLiteral

Returns:

true if this literal is typed with "http://www.w3.org/2001/XMLSchema#"float, i.e. this literal represents a float, otherwise false.

parseFloat

public float parseFloat()
                 throws java.lang.NumberFormatException

Description copied from interface: OWLLiteral

Parses the lexical value of this literal into a float. The lexical value of this literal should be in the lexical space of the float datatype ("http://www.w3.org/2001/XMLSchema#"float).

Specified by:

parseFloat in interface OWLLiteral

Returns:

A float value that is represented by this literal.

Throws:

java.lang.NumberFormatException - if the lexical form could not be parsed into a float because it is not in the lexical space of the float datatype.

getLang

public java.lang.String getLang()

Description copied from interface: OWLLiteral

Gets the language tag of this literal.

Specified by:

getLang in interface OWLLiteral

Returns:

The language tag of this literal. If the literal does not have a language tag, because it is not of the type rdf:PlainLiteral, or because its language tag is empty, then the empty string will be returned. (The null value is never returned).

hasLang

public boolean hasLang(java.lang.String l)

Description copied from interface: OWLLiteral

Determines if this OWLLiteral has a particular language tag.

Specified by:

hasLang in interface OWLLiteral

Parameters:

l - The specific lang to test for. The tag will be normalised - white space will be trimmed from the end and it will be converted to lower case.

Returns:

true if this literal has a language tag equal to lang, otherwise false.

getDatatype

public OWLDatatype getDatatype()

Description copied from interface: OWLLiteral

Gets the OWLDatatype which types this literal.

Specified by:

getDatatype in interface OWLLiteral

Returns:

The OWLDatatype that types this literal. Note that for strings with language tag (previously considered to be untyped literals) the datatype will be rdf:PlainLiteral. The return value is never null.

hashCode

public int hashCode()

Overrides:

hashCode in class OWLObjectImpl

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class OWLObjectImpl

accept

public void accept(OWLDataVisitor visitor)

Specified by:

accept in interface OWLLiteral

accept

public <O> O accept(OWLDataVisitorEx<O> visitor)

Specified by:

accept in interface OWLLiteral

accept

public void accept(OWLAnnotationValueVisitor visitor)

Specified by:

accept in interface OWLAnnotationValue

accept

public <O> O accept(OWLAnnotationValueVisitorEx<O> visitor)

Specified by:

accept in interface OWLAnnotationValue

compareObjectOfSameType

protected int compareObjectOfSameType(OWLObject object)

Specified by:

compareObjectOfSameType in class OWLObjectImpl

accept

public void accept(OWLObjectVisitor visitor)

Specified by:

accept in interface OWLObject

accept

public <O> O accept(OWLObjectVisitorEx<O> visitor)

Specified by:

accept in interface OWLObject