Class SparqlQueryRenderer

java.lang.Object

org.eclipse.rdf4j.query.algebra.helpers.AbstractQueryModelVisitor<Exception>

org.eclipse.rdf4j.queryrender.BaseTupleExprRenderer

org.eclipse.rdf4j.queryrender.sparql.experimental.SparqlQueryRenderer

All Implemented Interfaces:

QueryModelVisitor<Exception>, QueryRenderer

@Experimental
public class SparqlQueryRenderer
extends BaseTupleExprRenderer
implements QueryRenderer

An alternative implementation of the SPARQL query renderer (more complete than the default SPARQLQueryRenderer)

Author:

Andriy Nikolov, Jeen Broekstra, Andreas Schwarte

Field Summary

Fields inherited from class BaseTupleExprRenderer

mDistinct, mExtensions, mLimit, mOffset, mOrdering, mProjection, mReduced

Modifier and Type	Field	Description
protected boolean	mDistinct	Whether or not the query is distinct
protected Map<String, ValueExpr>	mExtensions	A map of the extensions specified in the query.
protected long	mLimit	The limit of results for the query, or -1 for no limit
protected long	mOffset	The query offset, or -1 for no offset
protected List<OrderElem>	mOrdering	The elements specified in the order by clause of the query
protected List<ProjectionElemList>	mProjection	The list of elements include in the projection of the query
protected boolean	mReduced	Whether or not the query is reduced

Constructor Summary

Constructors

Constructor	Description
SparqlQueryRenderer()

Method Summary

Modifier and Type	Method	Description
QueryLanguage	getLanguage()	Return the language this QueryRenderer will render queries in.
String	render(TupleExpr theExpr)	Render the TupleExpr as a query or query fragment depending on what kind of TupleExpr it is
String	render(ParsedOperation theOperation)
String	render(ParsedQuery theQuery)	Render the ParsedQuery as a query string
String	renderValueExpr(ValueExpr theExpr)	Render the given ValueExpr

Methods inherited from class BaseTupleExprRenderer

getExtensions, getLimit, getOffset, getOrdering, getProjection, isDistinct, isReduced, isSelect, isSPOElemList, meet, meet, meet, meet, meet, meet, meet, reset, scrubVarName, toStatementPattern

Modifier and Type	Method	Description
Map<String, ValueExpr>	getExtensions()
long	getLimit()
long	getOffset()
List<OrderElem>	getOrdering()
List<ProjectionElemList>	getProjection()
boolean	isDistinct()
boolean	isReduced()
protected boolean	isSelect()	Returns whether or not the results of scanning the query model indicates that this represents a select query
static boolean	isSPOElemList(ProjectionElemList theList)	Return whether or not this projection looks like an spo binding for a construct query
void	meet(Distinct theDistinct)
void	meet(ExtensionElem theExtensionElem)
void	meet(OrderElem theOrderElem)
void	meet(ProjectionElemList theProjectionElemList)
void	meet(Reduced theReduced)
void	meet(Slice theSlice)
void	meet(StatementPattern theStatementPattern)
void	reset()	Reset the state of the renderer
static String	scrubVarName(String theName)	Scrub any illegal characters out of the variable name
StatementPattern	toStatementPattern(ProjectionElemList theList)	Turn a ProjectionElemList for a construct query projection (three elements aliased as 'subject', 'predicate' and 'object' in that order) into a StatementPattern.

Methods inherited from class AbstractQueryModelVisitor

meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meet, meetBinaryTupleOperator, meetBinaryValueOperator, meetCompareSubQueryValueOperator, meetNAryValueOperator, meetNode, meetOther, meetSubQueryValueOperator, meetUnaryTupleOperator, meetUnaryValueOperator, meetUpdateExpr

Modifier and Type	Method	Description
void	meet(Add node)
void	meet(AggregateFunctionCall node)
void	meet(And node)
void	meet(ArbitraryLengthPath node)
void	meet(Avg node)
void	meet(BindingSetAssignment node)
void	meet(BNodeGenerator node)
void	meet(Bound node)
void	meet(Clear node)
void	meet(Coalesce node)
void	meet(Compare node)
void	meet(CompareAll node)
void	meet(CompareAny node)
void	meet(Copy node)
void	meet(Count node)
void	meet(Create node)
void	meet(Datatype node)
void	meet(DeleteData node)
void	meet(DescribeOperator node)
void	meet(Difference node)
void	meet(EmptySet node)
void	meet(Exists node)
void	meet(Extension node)
void	meet(Filter node)
void	meet(FunctionCall node)
void	meet(Group node)
void	meet(GroupConcat node)
void	meet(GroupElem node)
void	meet(If node)
void	meet(In node)
void	meet(InsertData node)
void	meet(Intersection node)
void	meet(IRIFunction node)
void	meet(IsBNode node)
void	meet(IsLiteral node)
void	meet(IsNumeric node)
void	meet(IsResource node)
void	meet(IsURI node)
void	meet(Join node)
void	meet(Label node)
void	meet(Lang node)
void	meet(LangMatches node)
void	meet(LeftJoin node)
void	meet(ListMemberOperator node)
void	meet(Load node)
void	meet(LocalName node)
void	meet(MathExpr node)
void	meet(Max node)
void	meet(Min node)
void	meet(Modify node)
void	meet(Move node)
void	meet(MultiProjection node)
void	meet(Namespace node)
void	meet(Not node)
void	meet(Or node)
void	meet(Order node)
void	meet(Projection node)
void	meet(ProjectionElem node)
void	meet(QueryRoot node)
void	meet(Regex node)
void	meet(SameTerm node)
void	meet(Sample node)
void	meet(Service node)
void	meet(SingletonSet node)
void	meet(Str node)
void	meet(Sum node)
void	meet(TripleRef node)
void	meet(Union node)
void	meet(ValueConstant node)
void	meet(ValueExprTripleRef node)
void	meet(Var node)
void	meet(ZeroLengthPath node)
protected void	meetBinaryTupleOperator(BinaryTupleOperator node)	Method called by all meet methods with a BinaryTupleOperator node as argument.
protected void	meetBinaryValueOperator(BinaryValueOperator node)	Method called by all meet methods with a BinaryValueOperator node as argument.
protected void	meetCompareSubQueryValueOperator(CompareSubQueryValueOperator node)	Method called by all meet methods with a CompareSubQueryValueOperator node as argument.
protected void	meetNAryValueOperator(NAryValueOperator node)	Method called by all meet methods with a NAryValueOperator node as argument.
protected void	meetNode(QueryModelNode node)	Method called by all of the other meet methods that are not overridden in subclasses.
void	meetOther(QueryModelNode node)
protected void	meetSubQueryValueOperator(SubQueryValueOperator node)	Method called by all meet methods with a SubQueryValueOperator node as argument.
protected void	meetUnaryTupleOperator(UnaryTupleOperator node)	Method called by all meet methods with a UnaryTupleOperator node as argument.
protected void	meetUnaryValueOperator(UnaryValueOperator node)	Method called by all meet methods with a UnaryValueOperator node as argument.
protected void	meetUpdateExpr(UpdateExpr node)	Method called by all meet methods with a UpdateExpr node as argument.

Methods inherited from class Object

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

Constructor Details

SparqlQueryRenderer

public SparqlQueryRenderer()

Method Details

getLanguage

public QueryLanguage getLanguage()

Description copied from interface: QueryRenderer

Return the language this QueryRenderer will render queries in.

Specified by:

getLanguage in interface QueryRenderer

Returns:

the query language

render

public String render(ParsedQuery theQuery)

Description copied from class: BaseTupleExprRenderer

Render the ParsedQuery as a query string

Specified by:

render in interface QueryRenderer

Overrides:

render in class BaseTupleExprRenderer

Parameters:

theQuery - the parsed query to render

Returns:

the query object rendered in the query language syntax

render

public String render(ParsedOperation theOperation)

render

public String render(TupleExpr theExpr)

Description copied from class: BaseTupleExprRenderer

Render the TupleExpr as a query or query fragment depending on what kind of TupleExpr it is

Specified by:

render in class BaseTupleExprRenderer

Parameters:

theExpr - the expression to render

Returns:

the TupleExpr rendered in the query language syntax

renderValueExpr

public String renderValueExpr(ValueExpr theExpr)

Description copied from class: BaseTupleExprRenderer

Render the given ValueExpr

Specified by:

renderValueExpr in class BaseTupleExprRenderer

Parameters:

theExpr - the expr to render

Returns:

the rendered expression