com.hazelcast.query.impl.predicates

Class PredicateUtils

java.lang.Object

com.hazelcast.query.impl.predicates.PredicateUtils

public final class PredicateUtils
extends Object

Method Summary

Modifier and Type	Method and Description
static int	estimatedSizeOf(Collection<QueryableEntry> result) In case of AndResultSet and OrResultSet calling size() may be very expensive so quicker estimatedSize() is used.
static boolean	isNull(Comparable value)
static <T> T	unwrapIfOptional(Object value) Unwraps the given potentially optional value.

Methods inherited from class java.lang.Object

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

Method Detail

estimatedSizeOf

public static int estimatedSizeOf(Collection<QueryableEntry> result)

In case of AndResultSet and OrResultSet calling size() may be very expensive so quicker estimatedSize() is used.

Parameters:

result - result of a predicated search

Returns:

size or estimated size

See Also:

AndResultSet.estimatedSize(), OrResultSet.estimatedSize()

isNull

public static boolean isNull(Comparable value)

Returns:

true if the given value is considered as a null-like by predicates and indexes, false otherwise.

unwrapIfOptional

public static <T> T unwrapIfOptional(Object value)

Unwraps the given potentially optional value.

Parameters:

value - the potentially optional value to unwrap.

Returns:

an unwrapped value, if the given value is optional; the original given value, if it's not optional.