pro.fessional.mirana.page

Class PageUtil

java.lang.Object

pro.fessional.mirana.page.PageUtil

public class PageUtil
extends Object

Since:

2016-01-31.

Author:

trydofor

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	PageUtil.By
static class	PageUtil.Sb

Field Summary

Fields

Modifier and Type	Field and Description
static char	SORT_DELI
static char	SORT_DESC

Constructor Summary

Constructors

Constructor and Description
PageUtil()

Method Summary

Modifier and Type	Method and Description
static int	dataIndex(int pageNumber, int pageSize) Calc the index of the data by current pageNumber and pageSize.
static <E> @NotNull List<List<E>>	paginate(List<E> data, int pageSize) paginate a list of data
static <E> int	paginate(List<E> data, int pageSize, BiConsumer<Integer,List<E>> consumer) paginate a list of data
static @NotNull List<PageUtil.By>	sort(String sort) Constructs the order-by convention string.
static @NotNull PageUtil.Sb	sortBy()
static int	totalPage(int totalData, int pageSize) Calc the total page by totalData and pageSize.

Methods inherited from class java.lang.Object

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

Field Detail

SORT_DESC

public static final char SORT_DESC

See Also:

Constant Field Values

SORT_DELI

public static final char SORT_DELI

See Also:

Constant Field Values

Constructor Detail

PageUtil

public PageUtil()

Method Detail

dataIndex

public static int dataIndex(int pageNumber,
                            int pageSize)

Calc the index of the data by current pageNumber and pageSize.

Parameters:

pageNumber - 1-based, not less than 1.

pageSize - 1-based, not less than 1.

Returns:

the 0-based index

totalPage

public static int totalPage(int totalData,
                            int pageSize)

Calc the total page by totalData and pageSize.

Parameters:

totalData - The total number of data, over 2.1 billion is unthinkable

pageSize - pageSize, 1-based, not less than 1.

Returns:

Calc the total page, 1-based. 0 if totalData is le 0

sortBy

@NotNull
public static @NotNull PageUtil.Sb sortBy()

sort

@NotNull
public static @NotNull List<PageUtil.By> sort(String sort)

 Constructs the order-by convention string.
 `,` - delimited
 `key` - means asc
 `-key` - means desc
 Automatically remove all whitespace characters via WitheUtil
 

See Also:

SORT_DELI, SORT_DESC

paginate

public static <E> int paginate(List<E> data,
                               int pageSize,
                               BiConsumer<Integer,List<E>> consumer)

paginate a list of data

Type Parameters:

E - data Type

Parameters:

data - list of data

pageSize - page size

consumer - Acceptor of pageNumber and current page data

Returns:

Number of pages, 0 means no data

paginate

@NotNull
public static <E> @NotNull List<List<E>> paginate(List<E> data,
                                                           int pageSize)

paginate a list of data

Type Parameters:

E - data Type

Parameters:

data - list of data

pageSize - page size

Returns:

Paginated list