org.apache.hadoop.hive.ql.wm

Interface Expression

All Known Implementing Classes:

TriggerExpression

public interface Expression

Expression that is defined in triggers. Most expressions will get triggered only after exceeding a limit. As a result, only greater than (>) expression is supported.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	Expression.Builder
static class	Expression.Predicate

Method Summary

Modifier and Type	Method and Description
Expression	clone() Return cloned copy of this expression.
boolean	evaluate(long current) Evaluate current value against this expression.
CounterLimit	getCounterLimit() Return counter limit
Expression.Predicate	getPredicate() Return predicate defined in the expression.

Method Detail

evaluate

boolean evaluate(long current)

Evaluate current value against this expression. Return true if expression evaluates to true (current > limit) else false otherwise

Parameters:

current - - current value against which expression will be evaluated

Returns:

true if current value exceeds limit

getCounterLimit

CounterLimit getCounterLimit()

Return counter limit

Returns:

counter limit

getPredicate

Expression.Predicate getPredicate()

Return predicate defined in the expression.

Returns:

predicate

clone

Expression clone()

Return cloned copy of this expression.

Returns:

cloned copy