com.yahoo.bullet.querying.evaluators

Class Evaluator

java.lang.Object

com.yahoo.bullet.querying.evaluators.Evaluator

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

BinaryEvaluator, CastEvaluator, FieldEvaluator, ListEvaluator, NAryEvaluator, UnaryEvaluator, ValueEvaluator

public abstract class Evaluator
extends Object
implements Serializable

Evaluators are built from expressions. They are evaluated given a BulletRecord and will throw exceptions on any errors which are most likely to be the result of missing fields or incorrect types.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Evaluator()

Method Summary

Modifier and Type	Method and Description
abstract com.yahoo.bullet.typesystem.TypedObject	evaluate(com.yahoo.bullet.record.BulletRecord record) Evaluates this evaluator on the given BulletRecord.

Methods inherited from class java.lang.Object

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

Constructor Detail

Evaluator

public Evaluator()

Method Detail

evaluate

public abstract com.yahoo.bullet.typesystem.TypedObject evaluate(com.yahoo.bullet.record.BulletRecord record)

Evaluates this evaluator on the given BulletRecord.

Parameters:

record - The Bullet record to evaluate this evaluator on.

Returns:

The result of this evaluator on the given Bullet record.