Class Slice

All Implemented Interfaces:
Serializable, Cloneable, GraphPatternGroupable, QueryModelNode, TupleExpr, VariableScopeChange

public class Slice extends UnaryTupleOperator
The SLICE operator, as defined in SPARQL Query Language for RDF. The SLICE operator selects specific results from the underlying tuple expression based on an offset and limit value (both optional).
Arjohn Kampman
See Also:
  • Constructor Details

    • Slice

      public Slice()
    • Slice

      public Slice(TupleExpr arg)
    • Slice

      public Slice(TupleExpr arg, long offset2, long limit2)
  • Method Details

    • getOffset

      public long getOffset()
    • setOffset

      public void setOffset(long offset)
    • hasOffset

      public boolean hasOffset()
      Checks whether the row selection has a (valid) offset.
      true when offset > 0
    • getLimit

      public long getLimit()
    • setLimit

      public void setLimit(long limit)
    • hasLimit

      public boolean hasLimit()
      Checks whether the row selection has a (valid) limit.
      true when offset >= 0
    • 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.
    • getSignature

      public String getSignature()
      Description copied from class: AbstractQueryModelNode
      Default implementation of QueryModelNode.getSignature() that prints the name of the node's class.
      Specified by:
      getSignature in interface QueryModelNode
      getSignature in class AbstractQueryModelNode
      The node's signature, e.g. SLICE (offset=10, limit=10).
    • equals

      public boolean equals(Object other)
      Description copied from interface: QueryModelNode
      Returns true if this query model node and its children are recursively equal to o and its children.
      Specified by:
      equals in interface QueryModelNode
      equals in class UnaryTupleOperator
    • hashCode

      public int hashCode()
      hashCode in class UnaryTupleOperator
    • clone

      public Slice 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
      clone in class UnaryTupleOperator
      A deep clone of this query model node.