io.delta.kernel.expressions

Class BinaryExpression

java.lang.Object

io.delta.kernel.expressions.BinaryExpression

All Implemented Interfaces:

Expression

Direct Known Subclasses:

BinaryOperator

public abstract class BinaryExpression
extends java.lang.Object
implements Expression

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

Field Summary

Fields

Modifier and Type	Field and Description
protected Expression	left
protected Expression	right

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	BinaryExpression(Expression left, Expression right)

Method Summary

Modifier and Type	Method and Description
java.util.List<Expression>	children()
boolean	equals(java.lang.Object o)
java.lang.Object	eval(Row row)
Expression	getLeft()
Expression	getRight()
int	hashCode()
protected abstract java.lang.Object	nullSafeEval(java.lang.Object leftResult, java.lang.Object rightResult)

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

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

dataType, references, toString

Field Detail

left

protected final Expression left

right

protected final Expression right

Constructor Detail

BinaryExpression

protected BinaryExpression(Expression left,
                           Expression right)

Method Detail

getLeft

public Expression getLeft()

getRight

public Expression getRight()

eval

public final java.lang.Object eval(Row row)

Specified by:

eval in interface Expression

Parameters:

row - the input row to evaluate.

Returns:

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

nullSafeEval

protected abstract java.lang.Object nullSafeEval(java.lang.Object leftResult,
                                                 java.lang.Object rightResult)

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(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object