Class TripleRefJoinGroup

java.lang.Object

org.eclipse.rdf4j.query.algebra.AbstractQueryModelNode

org.eclipse.rdf4j.federated.algebra.TripleRefJoinGroup

All Implemented Interfaces:

Serializable, Cloneable, FedXTupleExpr, QueryRef, VariableExpr, QueryModelNode, TupleExpr, VariableScopeChange

public class TripleRefJoinGroup
extends AbstractQueryModelNode
implements FedXTupleExpr

A join group around a TripleRefStatementPattern: besides the TripleRefStatementPattern it contains the list of StatementPattern sharing the same subject (typically a blank node). TripleRefJoinGroup can be associated to multiple StatementSources, where on each it gets executed in a single expression.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
TripleRefJoinGroup(TripleRefStatementPattern tripleRef, List<StatementPattern> stmts, List<StatementSource> statementSources, QueryInfo queryInfo)

Method Summary

Modifier and Type	Method	Description
TripleRefJoinGroup	clone()	Returns a (deep) clone of this query model node.
Set<String>	getAssuredBindingNames()	Gets the names of the bindings that are guaranteed to be present in the results produced by this tuple expression.
Set<String>	getBindingNames()	Gets the names of the bindings that are, or can be, returned by this tuple expression when it is evaluated.
List<String>	getFreeVars()
QueryInfo	getQueryInfo()	Retrieve the attached query information of the tuple expression
List<StatementPattern>	getStatementPatterns()
List<StatementSource>	getStatementSources()
TripleRefStatementPattern	getTripleRefStatementPattern()
void	replaceChildNode(QueryModelNode current, QueryModelNode replacement)	Replaces one of the child nodes with a new node.
<X extends Exception> void	visit(QueryModelVisitor<X> visitor)	Visits this node.
<X extends Exception> void	visitChildren(QueryModelVisitor<X> visitor)	Visits the children of this node.

Methods inherited from class AbstractQueryModelNode

clearQueryModelMetadata, getCardinality, getCostEstimate, getDoubleMetricActual, getDoubleMetricPlanned, getDoubleMetricsActual, getDoubleMetricsPlanned, getHasNextCallCountActual, getHasNextTimeNanosActual, getHasNextTrueCountActual, getJoinLeftBindingsConsumedActual, getJoinRightBindingsConsumedActual, getJoinRightIteratorsCreatedActual, getLongMetricActual, getLongMetricPlanned, getLongMetricsActual, getLongMetricsPlanned, getNextCallCountActual, getNextTimeNanosActual, getParentNode, getQueryModelMetadata, getResultSizeActual, getResultSizeEstimate, getSignature, getSourceRowsFilteredActual, getSourceRowsMatchedActual, getSourceRowsScannedActual, getStringMetricActual, getStringMetricPlanned, getStringMetricsActual, getStringMetricsPlanned, getTotalTimeNanosActual, isCardinalitySet, isRuntimeTelemetryEnabled, isVariableScopeChange, nullEquals, removeQueryModelMetadata, replaceNodeInList, replaceWith, resetCardinality, setCardinality, setCostEstimate, setDoubleMetricActual, setDoubleMetricPlanned, setHasNextCallCountActual, setHasNextTimeNanosActual, setHasNextTrueCountActual, setJoinLeftBindingsConsumedActual, setJoinRightBindingsConsumedActual, setJoinRightIteratorsCreatedActual, setLongMetricActual, setLongMetricPlanned, setNextCallCountActual, setNextTimeNanosActual, setParentNode, setQueryModelMetadata, setResultSizeActual, setResultSizeEstimate, setRuntimeTelemetryEnabled, setSourceRowsFilteredActual, setSourceRowsMatchedActual, setSourceRowsScannedActual, setStringMetricActual, setStringMetricPlanned, setTotalTimeNanosActual, setVariableScopeChange, shouldCacheCardinality, toString

Methods inherited from class Object

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

Methods inherited from interface FedXTupleExpr

getFreeVarCount

Methods inherited from interface QueryModelNode

clearQueryModelMetadata, equals, getCostEstimate, getDoubleMetricActual, getDoubleMetricPlanned, getDoubleMetricsActual, getDoubleMetricsPlanned, getHasNextCallCountActual, getHasNextTimeNanosActual, getHasNextTrueCountActual, getJoinLeftBindingsConsumedActual, getJoinRightBindingsConsumedActual, getJoinRightIteratorsCreatedActual, getLongMetricActual, getLongMetricPlanned, getLongMetricsActual, getLongMetricsPlanned, getNextCallCountActual, getNextTimeNanosActual, getParentNode, getQueryModelMetadata, getResultSizeActual, getResultSizeEstimate, getSignature, getSourceRowsFilteredActual, getSourceRowsMatchedActual, getSourceRowsScannedActual, getStringMetricActual, getStringMetricPlanned, getStringMetricsActual, getStringMetricsPlanned, getTotalTimeNanosActual, isRuntimeTelemetryEnabled, removeQueryModelMetadata, replaceWith, setCostEstimate, setDoubleMetricActual, setDoubleMetricPlanned, setHasNextCallCountActual, setHasNextTimeNanosActual, setHasNextTrueCountActual, setJoinLeftBindingsConsumedActual, setJoinRightBindingsConsumedActual, setJoinRightIteratorsCreatedActual, setLongMetricActual, setLongMetricPlanned, setNextCallCountActual, setNextTimeNanosActual, setParentNode, setQueryModelMetadata, setResultSizeActual, setResultSizeEstimate, setRuntimeTelemetryEnabled, setSourceRowsFilteredActual, setSourceRowsMatchedActual, setSourceRowsScannedActual, setStringMetricActual, setStringMetricPlanned, setTotalTimeNanosActual, toString

Methods inherited from interface TupleExpr

getOrder, getSupportedOrders, setOrder

Constructor Details

TripleRefJoinGroup

public TripleRefJoinGroup(TripleRefStatementPattern tripleRef,
 List<StatementPattern> stmts,
 List<StatementSource> statementSources,
 QueryInfo queryInfo)

Method Details

getBindingNames

public Set<String> getBindingNames()

Description copied from interface: TupleExpr

Gets the names of the bindings that are, or can be, returned by this tuple expression when it is evaluated.

Specified by:

getBindingNames in interface TupleExpr

Returns:

A set of binding names.

getAssuredBindingNames

public Set<String> getAssuredBindingNames()

Description copied from interface: TupleExpr

Gets the names of the bindings that are guaranteed to be present in the results produced by this tuple expression.

Specified by:

getAssuredBindingNames in interface TupleExpr

Returns:

A set of binding names.

getStatementSources

public List<StatementSource> getStatementSources()

getTripleRefStatementPattern

public TripleRefStatementPattern getTripleRefStatementPattern()

getStatementPatterns

public List<StatementPattern> getStatementPatterns()

visit

public <X extends Exception> void visit(QueryModelVisitor<X> visitor)
                                 throws X

Description copied from interface: QueryModelNode

Visits this node. The node reports itself to the visitor with the proper runtime type.

Specified by:

visit in interface QueryModelNode

Throws:

X

visitChildren

public <X extends Exception> void visitChildren(QueryModelVisitor<X> visitor)
                                         throws X

Description copied from interface: QueryModelNode

Visits the children of this node. The node calls QueryModelNode.visit(QueryModelVisitor) on all of its child nodes.

Specified by:

visitChildren in interface QueryModelNode

Throws:

X

replaceChildNode

public void replaceChildNode(QueryModelNode current,
 QueryModelNode replacement)

Description copied from interface: QueryModelNode

Replaces one of the child nodes with a new node.

Specified by:

replaceChildNode in interface QueryModelNode

Parameters:

current - The current child node.

replacement - The new child node.

getFreeVars

public List<String> getFreeVars()

Specified by:

getFreeVars in interface VariableExpr

Returns:

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

getQueryInfo

public QueryInfo getQueryInfo()

Description copied from interface: QueryRef

Retrieve the attached query information of the tuple expression

Specified by:

getQueryInfo in interface QueryRef

Returns:

the QueryInfo

clone

public TripleRefJoinGroup clone()

Description copied from interface: QueryModelNode

Returns a (deep) clone of this query model node. This method recursively clones the entire node tree, starting from this nodes.

Specified by:

clone in interface QueryModelNode

Specified by:

clone in interface TupleExpr

Overrides:

clone in class AbstractQueryModelNode

Returns:

A deep clone of this query model node.