org.eclipse.rdf4j.query.algebra

## Interface QueryModelVisitor<X extends Exception>

- All Known Implementing Classes:
    AbstractQueryModelVisitor, BaseTupleExprRenderer, BGPCollector, BindingAssigner.VarVisitor, CompareOptimizer.CompareVisitor, ConjunctiveConstraintSplitter.ConstraintVisitor, ConstantOptimizer.ConstantVisitor, ConstantOptimizer.VarNameCollector, ContextCollector, DisjunctiveConstraintOptimizer.OrSameTermOptimizer, EmptyPatternOptimizer, EvaluationStatistics.CardinalityCalculator, EvaluationStatistics.CardinalityCalculator, ExclusiveTupleExprOptimizer, FederationJoinOptimizer, FilterOptimizer, FilterOptimizer.FilterExprInsertVisitor, FilterOptimizer.FilterFinder, FilterOptimizer.FilterRelocator, FilterOptimizer.VarFinder, GenericInfoOptimizer, IterativeEvaluationOptimizer.IEOVisitor, LimitOptimizer, OrderLimitOptimizer.OrderOptimizer, OwnedTupleExprPruner, PrepareOwnedTupleExpr, QueryJoinOptimizer.JoinVisitor, QueryModelNodeReplacer, QueryModelNormalizer, QueryModelPruner.TreeSanitizer, QueryModelPruner.TreeSanitizer, QueryModelTreePrinter, QueryModelTreeToGenericPlanNode, QueryModelVisitorBase, QueryMultiJoinOptimizer.JoinVisitor, RegexAsStringFunctionOptimizer.RegexAsStringFunctionVisitor, SameTermFilterOptimizer.BindingSetAssignmentCollector, SameTermFilterOptimizer.SameTermFilterVisitor, SameTermFilterOptimizer.VarBinder, SameTermFilterOptimizer.VarRenamer, ServiceOptimizer, SparqlTupleExprRenderer, StatementGroupAndJoinOptimizer, StatementPatternCollector, TripleRefCollector, TupleExprBuilder.SameTermCollector, TupleExprBuilder.VarCollector, TupleFunctionEvaluationStatistics.TupleFunctionCardinalityCalculator, UnionOptimizer, VarNameCollector

      public interface QueryModelVisitor<X extends Exception>

  An interface for query model visitors, implementing the Visitor pattern. Core query model nodes will call their type-specific method when `QueryModelNode.visit(QueryModelVisitor)` is called. The method `meetOther(QueryModelNode)` is provided as a hook for foreign query model nodes.

- - ### Method Summary

    All Methods Instance Methods Abstract Methods Default Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `meet(Add add)`
    `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 clear)`
    `void` | `meet(Coalesce node)`
    `void` | `meet(Compare node)`
    `void` | `meet(CompareAll node)`
    `void` | `meet(CompareAny node)`
    `void` | `meet(Copy copy)`
    `void` | `meet(Count node)`
    `void` | `meet(Create create)`
    `void` | `meet(Datatype node)`
    `void` | `meet(DeleteData deleteData)`
    `void` | `meet(DescribeOperator node)`
    `void` | `meet(Difference node)`
    `void` | `meet(Distinct node)`
    `void` | `meet(EmptySet node)`
    `void` | `meet(Exists node)`
    `void` | `meet(Extension node)`
    `void` | `meet(ExtensionElem 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 insertData)`
    `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(Like node)`
    `void` | `meet(ListMemberOperator node)`
    `void` | `meet(Load load)`
    `void` | `meet(LocalName node)`
    `void` | `meet(MathExpr node)`
    `void` | `meet(Max node)`
    `void` | `meet(Min node)`
    `void` | `meet(Modify modify)`
    `void` | `meet(Move move)`
    `void` | `meet(MultiProjection node)`
    `void` | `meet(Namespace node)`
    `void` | `meet(Not node)`
    `void` | `meet(Or node)`
    `void` | `meet(Order node)`
    `void` | `meet(OrderElem node)`
    `void` | `meet(Projection node)`
    `void` | `meet(ProjectionElem node)`
    `void` | `meet(ProjectionElemList node)`
    `void` | `meet(QueryRoot node)`
    `void` | `meet(Reduced node)`
    `void` | `meet(Regex node)`
    `void` | `meet(SameTerm node)`
    `void` | `meet(Sample node)`
    `void` | `meet(Service node)`
    `void` | `meet(SingletonSet node)`
    `void` | `meet(Slice node)`
    `void` | `meet(StatementPattern node)`
    `void` | `meet(Str node)`
    `void` | `meet(Sum node)`
    `default void` | `meet(TripleRef node)`
    `void` | `meet(Union node)`
    `void` | `meet(ValueConstant node)`
    `default void` | `meet(ValueExprTripleRef node)`
    `void` | `meet(Var node)`
    `void` | `meet(ZeroLengthPath node)`
    `void` | `meetOther(QueryModelNode node)`

- - ### Method Detail

    - #### meet

          void meet(QueryRoot node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Add add)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(And node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(ArbitraryLengthPath node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Avg node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(BindingSetAssignment node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(BNodeGenerator node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Bound node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Clear clear)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Coalesce node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Compare node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(CompareAll node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(CompareAny node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(DescribeOperator node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Copy copy)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Count node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Create create)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Datatype node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(DeleteData deleteData)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Difference node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Distinct node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(EmptySet node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Exists node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Extension node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(ExtensionElem node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Filter node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(FunctionCall node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Group node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(GroupConcat node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(GroupElem node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(If node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(In node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(InsertData insertData)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Intersection node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(IRIFunction node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(IsBNode node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(IsLiteral node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(IsNumeric node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(IsResource node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(IsURI node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Join node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Label node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Lang node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(LangMatches node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(LeftJoin node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Like node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Load load)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(LocalName node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(MathExpr node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Max node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Min node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Modify modify)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Move move)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(MultiProjection node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Namespace node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Not node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Or node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Order node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(OrderElem node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Projection node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(ProjectionElem node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(ProjectionElemList node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Reduced node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Regex node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(SameTerm node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Sample node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Service node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(SingletonSet node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Slice node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(StatementPattern node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Str node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Sum node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Union node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(ValueConstant node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(ListMemberOperator node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(Var node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          void meet(ZeroLengthPath node)
             throws X extends Exception

      Throws:
        `X extends Exception`

    - #### meet

          default void meet(TripleRef node)
                     throws X extends Exception

      Throws:
        `X extends Exception`
      Since:
        3.2.0

    - #### meet

          default void meet(ValueExprTripleRef node)
                     throws X extends Exception

      Throws:
        `X extends Exception`
      Since:
        3.2.0

    - #### meetOther

          void meetOther(QueryModelNode node)
                  throws X extends Exception

      Throws:
        `X extends Exception`

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