org.apache.hadoop.hbase

Class MatcherPredicate<T>

java.lang.Object

org.apache.hadoop.hbase.MatcherPredicate<T>

Type Parameters:

T - The type of value to be evaluated via Matcher.

All Implemented Interfaces:

Waiter.ExplainingPredicate<RuntimeException>, Waiter.Predicate<RuntimeException>

@InterfaceAudience.Private
public class MatcherPredicate<T>
extends Object
implements Waiter.ExplainingPredicate<RuntimeException>

An implementation of Waiter.ExplainingPredicate that uses Hamcrest Matcher for both predicate evaluation and explanation.

Field Summary

Fields

Modifier and Type	Field and Description
private T	currentValue
private org.hamcrest.Matcher<? super T>	matcher
private String	reason
private Supplier<T>	supplier

Constructor Summary

Constructors

Constructor and Description
MatcherPredicate(String reason, Supplier<T> supplier, org.hamcrest.Matcher<? super T> matcher)
MatcherPredicate(Supplier<T> supplier, org.hamcrest.Matcher<? super T> matcher)

Method Summary

Modifier and Type	Method and Description
boolean	evaluate() Perform a predicate evaluation.
String	explainFailure() Perform a predicate evaluation.

Methods inherited from class java.lang.Object

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

Field Detail

reason

private final String reason

supplier

private final Supplier<T> supplier

matcher

private final org.hamcrest.Matcher<? super T> matcher

currentValue

private T currentValue

Constructor Detail

MatcherPredicate

public MatcherPredicate(Supplier<T> supplier,
                        org.hamcrest.Matcher<? super T> matcher)

MatcherPredicate

public MatcherPredicate(String reason,
                        Supplier<T> supplier,
                        org.hamcrest.Matcher<? super T> matcher)

Method Detail

evaluate

public boolean evaluate()

Description copied from interface: Waiter.Predicate

Perform a predicate evaluation.

Specified by:

evaluate in interface Waiter.Predicate<RuntimeException>

Returns:

the boolean result of the evaluation.

explainFailure

public String explainFailure()

Description copied from interface: Waiter.ExplainingPredicate

Perform a predicate evaluation.

Specified by:

explainFailure in interface Waiter.ExplainingPredicate<RuntimeException>

Returns:

explanation of failed state