com.hazelcast.query.impl.predicates

Class AbstractIndexAwarePredicate<K,V>

java.lang.Object

com.hazelcast.query.impl.predicates.AbstractPredicate<K,V>

com.hazelcast.query.impl.predicates.AbstractIndexAwarePredicate<K,V>

All Implemented Interfaces:

DataSerializable, IdentifiedDataSerializable, IndexAwarePredicate<K,V>, Predicate<K,V>, Serializable

Direct Known Subclasses:

BetweenPredicate, EqualPredicate, GreaterLessPredicate, InPredicate

public abstract class AbstractIndexAwarePredicate<K,V>
extends AbstractPredicate<K,V>
implements IndexAwarePredicate<K,V>

See Also:

Serialized Form

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractIndexAwarePredicate()
protected	AbstractIndexAwarePredicate(String attributeName)

Method Summary

Modifier and Type	Method and Description
protected Index	getIndex(QueryContext queryContext)
boolean	isIndexed(QueryContext queryContext) Signals to the query engine that this predicate is able to utilize the indexes available while executing the query in the given query context.

Methods inherited from class com.hazelcast.query.impl.predicates.AbstractPredicate

apply, applyForSingleAttributeValue, canEqual, convert, convertEnumValue, equals, getFactoryId, hashCode, readAttributeValue, readData, writeData

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.hazelcast.query.IndexAwarePredicate

filter

Methods inherited from interface com.hazelcast.query.Predicate

apply

Methods inherited from interface com.hazelcast.nio.serialization.IdentifiedDataSerializable

getId

Constructor Detail

AbstractIndexAwarePredicate

protected AbstractIndexAwarePredicate()

AbstractIndexAwarePredicate

protected AbstractIndexAwarePredicate(String attributeName)

Method Detail

isIndexed

public boolean isIndexed(QueryContext queryContext)

Description copied from interface: IndexAwarePredicate

Signals to the query engine that this predicate is able to utilize the indexes available while executing the query in the given query context.

Specified by:

isIndexed in interface IndexAwarePredicate<K,V>

Parameters:

queryContext - the query context to consult for the available indexes.

Returns:

true if this predicate is able to use the indexes to speed up the processing, false otherwise.

getIndex

protected Index getIndex(QueryContext queryContext)