com.hp.util

Class MarkPage<D>

java.lang.Object

com.hp.util.type.Page<MarkPageRequest<D>,D>

com.hp.util.MarkPage<D>

Type Parameters:

D - type of the data.

All Implemented Interfaces:

Serializable

public class MarkPage<D>
extends Page<MarkPageRequest<D>,D>

Mark based data page. This is used for paging data on NOSQL databases such as Cassandra. This page extends a generic Page that can be used for all kinds of databases. The Page contains a MarkPageRequest holding the marker and the direction to navigate. This scheme is different than paging using Offsets due to the nature of data storage in NOSQL DB.

Author:

Nachiket Abhyankar

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
MarkPage(MarkPageRequest<D> pageRequest, List<D> data) Creates a data page.

Method Summary

Methods

Modifier and Type	Method and Description
<T> MarkPage<T>	convert(Converter<D,T> converter) Converts a page to a different data type.
static <T> MarkPage<T>	emptyPage() Returns the empty page (immutable).
MarkPageRequest<D>	getNextPageRequest() Creates a request for the next page.
MarkPageRequest<D>	getPreviousPageRequest() Creates a request for the previous page.

Methods inherited from class com.hp.util.type.Page

getData, getRequest, isEmpty, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

MarkPage

public MarkPage(MarkPageRequest<D> pageRequest,
        List<D> data)

Creates a data page.

Parameters:

pageRequest - request that generated this page.

data - page's data.

Method Detail

emptyPage

public static <T> MarkPage<T> emptyPage()

Returns the empty page (immutable).

Returns:

an empty page.

convert

public <T> MarkPage<T> convert(Converter<D,T> converter)

Converts a page to a different data type.

Parameters:

converter - converter.

Returns:

a page with the new data type.

getNextPageRequest

public MarkPageRequest<D> getNextPageRequest()

Creates a request for the next page.

Returns:

a request for the next page if there is a page, null otherwise.

getPreviousPageRequest

public MarkPageRequest<D> getPreviousPageRequest()

Creates a request for the previous page.

Returns:

a request for the previous page if there is a page, null otherwise.