FedXTupleExpr (Eclipse RDF4J 4.3.2)

All Superinterfaces:

Cloneable, QueryModelNode, QueryRef, Serializable, TupleExpr, VariableExpr

All Known Subinterfaces:

ExclusiveTupleExpr, ExclusiveTupleExprRenderer, StatementTupleExpr

All Known Implementing Classes:

CheckStatementPattern, ExclusiveArbitraryLengthPath, ExclusiveGroup, ExclusiveStatement, FedXStatementPattern, PassThroughTupleExpr, StatementSourcePattern
```
public interface FedXTupleExpr
extends TupleExpr, VariableExpr, QueryRef
```
Interface marking known FedX algebra nodes.

Author:

Andreas Schwarte

See Also:

StatementTupleExpr, ExclusiveTupleExpr

- Method Summary
  
  All Methods Instance Methods Default Methods
  Modifier and Type Method Description
  
  default int getFreeVarCount()
  - Methods inherited from interface org.eclipse.rdf4j.query.algebra.QueryModelNode
    equals, getCostEstimate, getParentNode, getResultSizeActual, getResultSizeEstimate, getSignature, getTotalTimeNanosActual, replaceChildNode, replaceWith, setCostEstimate, setParentNode, setResultSizeActual, setResultSizeEstimate, setTotalTimeNanosActual, toString, visit, visitChildren
  - Methods inherited from interface org.eclipse.rdf4j.federated.algebra.QueryRef
    getQueryInfo
  - Methods inherited from interface org.eclipse.rdf4j.query.algebra.TupleExpr
    clone, getAssuredBindingNames, getBindingNames
  - Methods inherited from interface org.eclipse.rdf4j.federated.algebra.VariableExpr
    getFreeVars

- Method Detail
  - getFreeVarCount
```
default int getFreeVarCount()
```
    Returns:
    
    the number of free (i.e. unbound) variables in this expression