io.delta.standalone.expressions

Class UnaryExpression

Object

io.delta.standalone.expressions.UnaryExpression

All Implemented Interfaces:

Expression

Direct Known Subclasses:

IsNotNull, IsNull, Not

public abstract class UnaryExpression
extends Object
implements Expression

An Expression with one input and one output. The output is by default evaluated to null if the input is evaluated to null.

Method Summary

Modifier and Type	Method and Description
java.util.List<Expression>	children()
boolean	equals(Object o)
Object	eval(RowRecord record)
Expression	getChild()
int	hashCode()

Methods inherited from class Object

getClass, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface io.delta.standalone.expressions.Expression

dataType, references, toString

Method Detail

getChild

public Expression getChild()

eval

public Object eval(RowRecord record)

Specified by:

eval in interface Expression

Parameters:

record - the input record to evaluate.

Returns:

the result of evaluating this expression on the given input RowRecord.

children

public java.util.List<Expression> children()

Specified by:

children in interface Expression

Returns:

a List of the immediate children of this node

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object