org.openanzo.common.rdb.query
Class Literal

java.lang.Object
  org.openanzo.common.rdb.query.Literal

All Implemented Interfaces:

IRdbTerm, ILiteralTerm, IPlainLiteralTerm, ITypedLiteralTerm, RDFTerm, TriplePatternComponent

public class Literal
extends java.lang.Object
implements IRdbTerm, ILiteralTerm, IPlainLiteralTerm, ITypedLiteralTerm

Implementation of ILiteralTerm that maps an Anzo Litera to a Glitter ILiteralTerm

Author:

Matthew Roy ( mroy@cambridgesemantics.com )

Constructor Summary

Literal(CompositeNodeLayout nodeLayout, long id)
Create a new Literal for value stored in database with given ID

Literal(org.openrdf.model.Literal value)
Create a new Literal

Method Summary

void	clear() Clear the cache data for this object
int	compareTo(TriplePatternComponent o) Compares to TriplePatternComponents for ordering.
boolean	equals(java.lang.Object other)
java.net.URI	getDatatype()
long	getId() Get the ID of this node in the database
java.lang.String	getLanguage()
java.lang.String	getLexicalForm()
org.openrdf.model.Literal	getLiteralNode(java.util.Map<java.lang.Long,org.openrdf.model.Value> alreadyStored) Get the org.openrdf.model.Literal of this Literal
java.lang.Object	getNativeValue()
org.openrdf.model.Literal	getValue() Get the Value representation of this term
int	hashCode()
boolean	hasLanguage()
boolean	isPlainLiteral()
boolean	isTypedLiteral()
java.lang.String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Literal

public Literal(CompositeNodeLayout nodeLayout,
               long id)

Create a new Literal for value stored in database with given ID

Parameters:

nodeLayout - source of data

id - id of Literal in the database

Literal

public Literal(org.openrdf.model.Literal value)

Create a new Literal

Parameters:

value - org.openrdf.model.Literal representation of value

Method Detail

equals

public boolean equals(java.lang.Object other)

Specified by:

equals in interface TriplePatternComponent

Overrides:

equals in class java.lang.Object

clear

public void clear()

Clear the cache data for this object

getId

public long getId()

Description copied from interface: IRdbTerm

Get the ID of this node in the database

Specified by:

getId in interface IRdbTerm

Returns:

the ID of this node in the database

getLiteralNode

public org.openrdf.model.Literal getLiteralNode(java.util.Map<java.lang.Long,org.openrdf.model.Value> alreadyStored)

Get the org.openrdf.model.Literal of this Literal

Parameters:

alreadyStored - map of already resolved IDs to their org.openrdf.model.Literal value

Returns:

the org.openrdf.model.Literal of this Literal

getValue

public org.openrdf.model.Literal getValue()

Description copied from interface: IRdbTerm

Get the Value representation of this term

Specified by:

getValue in interface IRdbTerm

Returns:

the Value representation of this term

getLanguage

public java.lang.String getLanguage()

Specified by:

getLanguage in interface IPlainLiteralTerm

Returns:

The language tag for this plain literal. May be null, unless IPlainLiteralTerm.hasLanguage() returns true.

hasLanguage

public boolean hasLanguage()

Specified by:

hasLanguage in interface IPlainLiteralTerm

Returns:

whether or not this literal has a language tag

getLexicalForm

public java.lang.String getLexicalForm()

Specified by:

getLexicalForm in interface ILiteralTerm

Returns:

The lexical form of the literal.

getNativeValue

public java.lang.Object getNativeValue()

Specified by:

getNativeValue in interface ITypedLiteralTerm

Returns:

A native Java object capturing the value of this typed literal.

getDatatype

public java.net.URI getDatatype()

Specified by:

getDatatype in interface ITypedLiteralTerm

Returns:

The datatype of this typed literal. Must be a valid URI

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

compareTo

public int compareTo(TriplePatternComponent o)

Description copied from interface: TriplePatternComponent

Compares to TriplePatternComponents for ordering.

Specified by:

compareTo in interface TriplePatternComponent

Returns:

-1 if this comes before other; 0 if TriplePatternComponent.equals(Object) is true, and 1 otherwise.

isPlainLiteral

public boolean isPlainLiteral()

Specified by:

isPlainLiteral in interface ILiteralTerm

Returns:

whether or not this is a plain literal.

isTypedLiteral

public boolean isTypedLiteral()

Specified by:

isTypedLiteral in interface ILiteralTerm

Returns:

whether or not this is a typed literal.