Class ListRslNode


public class ListRslNode extends AbstractRslNode
This class represents an abstract RSL parse tree. It is composed of variable definitions (bindings), relations, and sub-specifications (sub nodes).
  • Field Details

    • _relations

      protected List _relations
    • _bindings

      protected List _bindings
  • Constructor Details

    • ListRslNode

      public ListRslNode()
    • ListRslNode

      public ListRslNode(int operator)
  • Method Details

    • add

      public boolean add(Bindings bindings)
      Specified by:
      add in class AbstractRslNode
    • add

      public boolean add(NameOpValue relation)
      Specified by:
      add in class AbstractRslNode
    • getParam

      public NameOpValue getParam(String attribute)
      Returns the relation associated with the given attribute.
      Specified by:
      getParam in class AbstractRslNode
      Parameters:
      attribute - the attribute of the relation.
      Returns:
      the relation for the attribute. Null, if not found.
    • getBindings

      public Bindings getBindings(String attribute)
      Returns the variable definitions associated wit the given attribute.
      Specified by:
      getBindings in class AbstractRslNode
      Parameters:
      attribute - the attribute of the variable deinitions.
      Returns:
      the variable deinitions for the attribute. Null, if not found.
    • removeBindings

      public Bindings removeBindings(String attribute)
      Removes a bindings list for the specified attribute.
      Specified by:
      removeBindings in class AbstractRslNode
      Parameters:
      attribute - the attribute name for the bindings.
      Returns:
      the bindings that were removed.
    • removeParam

      public NameOpValue removeParam(String attribute)
      Removes a relation for the specified attribute.
      Specified by:
      removeParam in class AbstractRslNode
      Parameters:
      attribute - the attribute name for the relation to remove.
      Returns:
      the relation that was removed.
    • mergeTo

      public void mergeTo(AbstractRslNode dstNode)
      Overrides:
      mergeTo in class AbstractRslNode
    • getRelations

      public List getRelations()
      Returns the relations.
      Returns:
      the list of relations.
    • getBindings

      public List getBindings()
      Returns the variable definitions.
      Returns:
      the map of variable definitions.
    • evaluate

      public AbstractRslNode evaluate(Map symbolTable) throws RslEvaluationException
      Evalutes the rsl tree against the specified symbol table. All the variable definitions are first evaluated because they might update the symbol table. Then all the relations followed by the sub-specifications are evaluated.
      Specified by:
      evaluate in class AbstractRslNode
      Parameters:
      symbolTable - the symbol table to evalute variables against.
      Returns:
      the evaluated rsl tree.
      Throws:
      RslEvaluationException - If an error occured during rsl evaluation.
    • toRSL

      public void toRSL(StringBuffer buf, boolean explicitConcat)
      Produces a RSL representation of node.
      Specified by:
      toRSL in class AbstractRslNode
      Parameters:
      buf - buffer to add the RSL representation to.
      explicitConcat - if true explicit concatination will be used in RSL strings.