PagingPredicate ClassHazelcast .Net Client Class Library
This class is a special Predicate which helps to get a page-by-page result of a query. It can be constructed with a page-size, an inner predicate for filtering, and a comparator for sorting.
Inheritance Hierarchy

SystemObject
  Hazelcast.CorePagingPredicate

Namespace: Hazelcast.Core
Assembly: Hazelcast.Net (in Hazelcast.Net.dll) Version: 3.8.2
Syntax

public class PagingPredicate : IPredicate, 
	IIdentifiedDataSerializable

The PagingPredicate type exposes the following members.

Constructors

  NameDescription
Public methodPagingPredicate
Creates a Paging predicate with provided page size and optional predicate and comparer.
Top
Properties

  NameDescription
Public propertyComparer
IComparer<KeyValuePair<object, object>>> implementation used to sort the result on client side.
Public propertyIterationType
Iteration type this paging predicate: One of Key, Value or Entry
Public propertyPage
Current page index
Public propertyPageSize
Page size of each iteration
Top
Methods

  NameDescription
Public methodEquals
Determines whether the specified Object is equal to the current Object.
(Inherited from Object.)
Public methodGetFactoryId
Public methodGetHashCode
Serves as a hash function for a particular type.
(Inherited from Object.)
Public methodGetId
Public methodGetNearestAnchorEntry
After each query, an anchor entry is set for that page. SetAnchor``2(Int32, UMP, UMP) For the next query user may set an arbitrary Page. for example: user queried first 5 pages which means first 5 anchor is available if the next query is for the 10th page then the nearest anchor belongs to page 5 but if the next query is for the 3nd page then the nearest anchor belongs to page 2
Public methodGetType
Gets the Type of the current instance.
(Inherited from Object.)
Public methodNextPage
sets the page value to next page
Public methodPreviousPage
sets the page value to previous page
Public methodReadData
Public methodReset
resets for reuse
Public methodToString
Returns a string that represents the current object.
(Inherited from Object.)
Public methodWriteData
Top
Extension Methods

  NameDescription
Public Extension MethodAnd (Defined by PredicateExt.)
Public Extension MethodNot (Defined by PredicateExt.)
Public Extension MethodOr (Defined by PredicateExt.)
Top
Remarks

This class is not thread-safe and stateless. To be able to reuse for another query, one should call Reset
Examples

Predicate lessEqualThanFour = Predicates.IsLessThanOrEqual("this", 4);
// We are constructing our paging predicate with a predicate and page size. In this case query results fetched two by two.
PagingPredicate predicate = new PagingPredicate(lessEqualThanFour, 2);
// we are initializing our map with integers from 0 to 10 as keys and values.
IMap map = hazelcastInstance.getMap("myMap");
for (int i = 0; i < 10; i++)
{
    map.Put(i, i);
}

//invoking the query
var values = map.Values(predicate);
Console.WriteLine("values = " + values); // will print 'values = [0, 1]'
predicate.NextPage(); // we are setting up paging predicate to fetch next page in the next call.
values = map.Values(predicate);
Console.WriteLine("values = " + values);// will print 'values = [2, 3]'
var anchor = predicate.GetAnchor();
Console.WriteLine("anchor -> " + anchor); // will print 'anchor -> 1=1',  since the anchor is the last entry of the previous page.
predicate.previousPage(); // we are setting up paging predicate to fetch previous page in the next call
values = map.Values(predicate);
Console.WriteLine("values = " + values) // will print 'values = [0, 1]'
See Also

Reference