Class FilterIsNull

java.lang.Object
io.deephaven.api.filter.FilterBase
io.deephaven.api.filter.FilterIsNull
All Implemented Interfaces:
Expression, Filter

@Immutable public abstract class FilterIsNull extends FilterBase
Evaluates to true when the given expression evaluates to null.
  • Constructor Details

    • FilterIsNull

      public FilterIsNull()
  • Method Details

    • of

      public static FilterIsNull of(Expression expression)
    • expression

      @Parameter public abstract Expression expression()
      The expression.
      Returns:
      the expression
    • invert

      public final FilterNot<FilterIsNull> invert()
      Description copied from interface: Filter
      The logical inversion of this. While logically equivalent to Filter.not(this), implementations of this method will return more specifically typed inversions where applicable.
      Returns:
      the inverse filter
      See Also:
    • walk

      public final <T> T walk(Filter.Visitor<T> visitor)