org.apache.ambari.server.controller.predicate

Class AlwaysPredicate

java.lang.Object

org.apache.ambari.server.controller.predicate.AlwaysPredicate

All Implemented Interfaces:

BasePredicate, PredicateVisitorAcceptor, Predicate

public class AlwaysPredicate
extends Object
implements BasePredicate

A predicate that always evaluates to true.

Field Summary

Fields

Modifier and Type	Field and Description
static AlwaysPredicate	INSTANCE

Constructor Summary

Constructors

Constructor and Description
AlwaysPredicate()

Method Summary

Modifier and Type	Method and Description
void	accept(PredicateVisitor visitor) Accept the given visitor.
boolean	evaluate(Resource resource) Evaluate the predicate for the given resource.
Set<String>	getPropertyIds()
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final AlwaysPredicate INSTANCE

Constructor Detail

AlwaysPredicate

public AlwaysPredicate()

Method Detail

evaluate

public boolean evaluate(Resource resource)

Description copied from interface: Predicate

Evaluate the predicate for the given resource.

Specified by:

evaluate in interface Predicate

Parameters:

resource - the resource to evaluate the predicate against

Returns:

the result of applying the predicate to the given resource

getPropertyIds

public Set<String> getPropertyIds()

Specified by:

getPropertyIds in interface BasePredicate

accept

public void accept(PredicateVisitor visitor)

Description copied from interface: PredicateVisitorAcceptor

Accept the given visitor.

Specified by:

accept in interface PredicateVisitorAcceptor

Parameters:

visitor - the visitor

toString

public String toString()

Overrides:

toString in class Object