org.da.sparqlhelper.sparql.model.expressions

Class LiteralExpression

java.lang.Object

org.da.sparqlhelper.sparql.model.expressions.AbstractExpression

org.da.sparqlhelper.sparql.model.expressions.LiteralExpression

All Implemented Interfaces:

Expression, ExpressionOperators

public class LiteralExpression
extends AbstractExpression

Represent a literal appearing in a BIND, FILTER, or COALESCE construct.

Field Summary

Fields inherited from class org.da.sparqlhelper.sparql.model.expressions.AbstractExpression

operator

Fields inherited from interface org.da.sparqlhelper.sparql.model.expressions.ExpressionOperators

AND, DEFAULT, DIVIDE, MINUS, MULTIPLY, NOT, OR, PLUS

Constructor Summary

Constructors

Constructor and Description
LiteralExpression(java.lang.Object literal) Constructor.
LiteralExpression(java.lang.Object literal, IRI iri) Constructor.
LiteralExpression(java.lang.Object literal, java.lang.String qname) Constructor.

Method Summary

Modifier and Type	Method and Description
void	appendContent(java.lang.String prefix, java.lang.StringBuilder buf) Append the expression content to a buffer.
boolean	checkValidity(ISparqlRequestGroup request) Return true.
IRI	getIRI() Return the IRI (may be null).
java.lang.Object	getLiteral() Return the literal.
java.util.Set<java.lang.String>	getOutputVariables() Return an empty set.
java.lang.String	getQName() Return the qualified name (may be null).
java.util.Set<java.lang.String>	getVariables() Return an empty set.
boolean	hasIRI() Return true if this Literal has an IRI.
boolean	hasQName() Return true if this Literal has a qualified name.
boolean	isSimpleExpression() Return true.

Methods inherited from class org.da.sparqlhelper.sparql.model.expressions.AbstractExpression

getOperator, setOperator, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.da.sparqlhelper.sparql.model.expressions.Expression

create, getContent, getOperatorAsString, getOperatorAsString

Constructor Detail

LiteralExpression

public LiteralExpression(java.lang.Object literal)

Constructor.

Parameters:

literal - the literal value

LiteralExpression

public LiteralExpression(java.lang.Object literal,
                         java.lang.String qname)

Constructor.

Parameters:

literal - the literal value

qname - the qualified name

LiteralExpression

public LiteralExpression(java.lang.Object literal,
                         IRI iri)

Constructor.

Parameters:

literal - the literal value

iri - the IRI

Method Detail

getLiteral

public java.lang.Object getLiteral()

Return the literal.

Returns:

the literal

getQName

public java.lang.String getQName()

Return the qualified name (may be null).

Returns:

the qualified name

hasQName

public boolean hasQName()

Return true if this Literal has a qualified name.

Returns:

true if this Literal has a qualified name

getIRI

public IRI getIRI()

Return the IRI (may be null).

Returns:

the IRI

hasIRI

public boolean hasIRI()

Return true if this Literal has an IRI.

Returns:

true if this Literal has an IRI

getOutputVariables

public java.util.Set<java.lang.String> getOutputVariables()

Return an empty set.

Returns:

the variables

getVariables

public java.util.Set<java.lang.String> getVariables()

Return an empty set.

Returns:

the variables

isSimpleExpression

public boolean isSimpleExpression()

Return true.

Returns:

true

checkValidity

public boolean checkValidity(ISparqlRequestGroup request)

Return true.

Parameters:

request - the request

Returns:

true

appendContent

public void appendContent(java.lang.String prefix,
                          java.lang.StringBuilder buf)

Description copied from interface: Expression

Append the expression content to a buffer.

Parameters:

prefix - the prefix

buf - the buffer