org.apache.ambari.server.api.query

Class SubResourcePredicateVisitor

java.lang.Object

org.apache.ambari.server.api.query.SubResourcePredicateVisitor

All Implemented Interfaces:

PredicateVisitor

public class SubResourcePredicateVisitor
extends Object
implements PredicateVisitor

A predicate visitor used to extract the sub resource elements from a given predicate and produce a new predicate that can be evaluated with a sub resource of the given category. For example, given the category 'components' the predicate ... ServiceInfo/service_name = HBASE AND components/ServiceComponentInfo/category = SLAVE AND components/host_components/metrics/cpu/cpu_num >= 1 ... will produce the new predicate ... ServiceComponentInfo/category = SLAVE AND host_components/metrics/cpu/cpu_num >= 1

Constructor Summary

Constructors

Constructor and Description
SubResourcePredicateVisitor(String category) Constructor.

Method Summary

Modifier and Type	Method and Description
void	acceptAlwaysPredicate(AlwaysPredicate predicate)
void	acceptArrayPredicate(ArrayPredicate arrayPredicate)
void	acceptCategoryPredicate(CategoryPredicate predicate)
void	acceptComparisonPredicate(ComparisonPredicate predicate)
void	acceptUnaryPredicate(UnaryPredicate predicate)
Predicate	getSubResourcePredicate() Obtain a predicate that can be evaluated with sub resources belonging to the associated category.

Methods inherited from class java.lang.Object

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

Constructor Detail

SubResourcePredicateVisitor

public SubResourcePredicateVisitor(String category)

Constructor.

Method Detail

acceptComparisonPredicate

public void acceptComparisonPredicate(ComparisonPredicate predicate)

Specified by:

acceptComparisonPredicate in interface PredicateVisitor

acceptArrayPredicate

public void acceptArrayPredicate(ArrayPredicate arrayPredicate)

Specified by:

acceptArrayPredicate in interface PredicateVisitor

acceptUnaryPredicate

public void acceptUnaryPredicate(UnaryPredicate predicate)

Specified by:

acceptUnaryPredicate in interface PredicateVisitor

acceptAlwaysPredicate

public void acceptAlwaysPredicate(AlwaysPredicate predicate)

Specified by:

acceptAlwaysPredicate in interface PredicateVisitor

acceptCategoryPredicate

public void acceptCategoryPredicate(CategoryPredicate predicate)

Specified by:

acceptCategoryPredicate in interface PredicateVisitor

getSubResourcePredicate

public Predicate getSubResourcePredicate()

Obtain a predicate that can be evaluated with sub resources belonging to the associated category.

Returns:

a sub resource predicate