Package org.eclipse.rdf4j.federated.algebra

Interface VariableExpr

All Known Subinterfaces:

ExclusiveTupleExpr, ExclusiveTupleExprRenderer, FedXTupleExpr, StatementTupleExpr

All Known Implementing Classes:

CheckStatementPattern, ExclusiveArbitraryLengthPath, ExclusiveGroup, ExclusiveStatement, FedXArbitraryLengthPath, FedXStatementPattern, PassThroughTupleExpr, StatementSourcePattern

public interface VariableExpr

Interface for algebra nodes that can return the free variables of the expression.

Author:

Andreas Schwarte

See Also:

• QueryAlgebraUtil.getFreeVars(org.eclipse.rdf4j.query.algebra.TupleExpr)

Method Summary

Modifier and Type	Method	Description
List<String>	getFreeVars()

Method Details

getFreeVars

List<String> getFreeVars()

Returns:

a list of free (i.e. unbound) variables in this expression