Package mondrian.rolap.agg

Class MinusStarPredicate

java.lang.Object
mondrian.rolap.agg.AbstractColumnPredicate
mondrian.rolap.agg.MinusStarPredicate
All Implemented Interfaces:
StarColumnPredicate, StarPredicate
public class MinusStarPredicate extends AbstractColumnPredicate
A StarPredicate which evaluates to true if its first child evaluates to true and its second child evaluates to false.
Since:
Nov 6, 2006
Author:
jhyde

  • Constructor Details

    • MinusStarPredicate

      public MinusStarPredicate(StarColumnPredicate plus, StarColumnPredicate minus)
      Creates a MinusStarPredicate.
      Parameters:
      plus - Positive predicate
      minus - Negative predicate

  • Method Details

    • equals

      public boolean equals(Object obj)
      Overrides:
      equals in class Object

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • getConstrainedColumn

      public RolapStar.Column getConstrainedColumn()
      Description copied from interface: StarColumnPredicate
      Returns the column constrained by this predicate.
      Specified by:
      getConstrainedColumn in interface StarColumnPredicate
      Overrides:
      getConstrainedColumn in class AbstractColumnPredicate
      Returns:
      Column constrained by this predicate.

    • values

      public void values(Collection<Object> collection)
      Description copied from interface: StarColumnPredicate
      Adds the values in this constraint to a collection.
      Parameters:
      collection - Collection to add values to

    • evaluate

      public boolean evaluate(Object value)
      Description copied from interface: StarColumnPredicate
      Returns whether this constraint would return true for a given value.
      Parameters:
      value - Value
      Returns:
      Whether predicate is true

    • describe

      public void describe(StringBuilder buf)
      Description copied from interface: StarPredicate
      Appends a description of this predicate to a StringBuilder. For example:
      • =any
      • =5
      • in (2, 4, 6)
      Parameters:
      buf - Builder to append to

    • intersect

      public StarColumnPredicate.Overlap intersect(StarColumnPredicate predicate)
      Description copied from interface: StarColumnPredicate
      Applies this predicate to a predicate from the axis of a segment, and tests for overlap. The result might be that there is no overlap, full overlap (so the constraint can be removed), or partial overlap (so the constraint will need to be replaced with a stronger constraint, say 'x > 10' is replaced with 'x > 20').
      Parameters:
      predicate - Predicate
      Returns:
      description of overlap between predicates, if any

    • mightIntersect

      public boolean mightIntersect(StarPredicate other)
      Description copied from interface: StarColumnPredicate
      Returns whether this predicate might intersect another predicate. That is, whether there might be a value which holds true for both constraints.
      Parameters:
      other - Other constraint
      Returns:
      Whether constraints intersect

    • minus

      public StarColumnPredicate minus(StarPredicate predicate)
      Description copied from interface: StarPredicate
      Returns the logical inverse of this Predicate. The result is a Predicate which holds whenever this predicate holds but the other does not.
      Parameters:
      predicate - Predicate
      Returns:
      Combined predicate

    • cloneWithColumn

      public StarColumnPredicate cloneWithColumn(RolapStar.Column column)
      Description copied from interface: StarColumnPredicate
      This method is required because unfortunately some ColumnPredicate objects are created without a column.

      We call this method to provide a fake column, then call StarPredicate.toSql(mondrian.rolap.sql.SqlQuery, StringBuilder).

      todo: remove this method when bug MONDRIAN-313 and bug MONDRIAN-314 are fixed.