Package org.apache.qpid.server.query.engine.parsing.expression.set

Class EmptySetExpression<T,​R>

  • Type Parameters:
    T - Input parameter type
    R - Output parameter type
    All Implemented Interfaces:
    java.util.function.Function<T,​R>, Expression<T,​R>, ExpressionNode<T,​R>, SetExpression<T,​R>
    public class EmptySetExpression<T,​R>
extends AbstractSetExpression<T,​R>
    Represents an empty set returned by a subquery

    • Constructor Detail

      • EmptySetExpression

        public EmptySetExpression()
        Initializes expression with a default distinct value (false)

    • Method Detail

      • apply

        public R apply​(T value)
        Shouldn't be called
        Parameters:
        value - Object to handle
        Returns:
        Null