Package mondrian.rolap.agg

Class LiteralStarPredicate

java.lang.Object
mondrian.rolap.agg.AbstractColumnPredicate
mondrian.rolap.agg.LiteralStarPredicate
All Implemented Interfaces:
StarColumnPredicate, StarPredicate
public class LiteralStarPredicate extends AbstractColumnPredicate
A constraint which always returns true or false.
Since:
Nov 2, 2006
Author:
jhyde

  • Field Details

  • Constructor Details

    • LiteralStarPredicate

      public LiteralStarPredicate(RolapStar.Column column, boolean value)
      Creates a LiteralStarPredicate.
      Parameters:
      column - Constrained column
      value - Truth value

  • Method Details

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • equals

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

    • evaluate

      public boolean evaluate(List<Object> valueList)
      Description copied from interface: StarPredicate
      Evaluates a constraint against a list of values.

      If one of the values is StarPredicate.WILDCARD, returns true if constraint is true for all possible values of that column.

      Specified by:
      evaluate in interface StarPredicate
      Overrides:
      evaluate in class AbstractColumnPredicate
      Parameters:
      valueList - List of values, one for each constrained column
      Returns:
      Whether constraint holds for given set of values

    • equalConstraint

      public boolean equalConstraint(StarPredicate that)
      Description copied from interface: StarPredicate
      Returns whether this Predicate has the same constraining effect as the other constraint. This is weaker than Object.equals(Object): it is possible for two different members to constrain the same column in the same way.
      Specified by:
      equalConstraint in interface StarPredicate
      Overrides:
      equalConstraint in class AbstractColumnPredicate
      Parameters:
      that - Other predicate
      Returns:
      whether the other predicate is equivalent

    • toString

      public String toString()
      Overrides:
      toString in class AbstractColumnPredicate

    • 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.

    • getValue

      public boolean getValue()

    • toSql

      public void toSql(SqlQuery sqlQuery, StringBuilder buf)
      Specified by:
      toSql in interface StarPredicate
      Overrides:
      toSql in class AbstractColumnPredicate