icu.easyj.data.memory.querier

Class AbstractQuerier<T>

java.lang.Object

icu.easyj.data.memory.querier.AbstractQuerier<T>

All Implemented Interfaces:

Pageable, Querier<T>, Sortable

public abstract class AbstractQuerier<T>
extends Object
implements Querier<T>, Sortable, Pageable

查询器 抽象类

Author:

wangliang181230

Field Summary

Fields

Modifier and Type	Field and Description
protected int	pageNumber The page number
protected int	pageSize The page size
protected SortParam[]	sortParams The sort params

Constructor Summary

Constructors

Constructor and Description
AbstractQuerier()

Method Summary

Modifier and Type	Method and Description
abstract <D extends T> int	compareByFieldName(D a, D b, String sortFieldName) Compare by field name.
<D extends T> List<D>	doPaging(List<D> list) Do paging.
<D extends T> List<D>	doSort(List<D> list) Do sort.
int	getFromIndex() The starting index of the current page
int	getPageNumber() Gets page number
int	getPageSize() Gets page size
SortParam[]	getSortParams() Gets sort params.
int	getToIndex(int fromIndex) The end index of the current page
void	setPageNumber(int pageNumber) Sets page number
void	setPageSize(int pageSize) Sets page size
void	setSortParams(SortParam... sortParams) Sets sort params.

Methods inherited from class java.lang.Object

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

Methods inherited from interface icu.easyj.data.memory.querier.Querier

doCount, doFilter, doQuery, isMatch

Methods inherited from interface icu.easyj.data.memory.querier.Sortable

hasSortParams, isNeedSort

Field Detail

sortParams

protected SortParam[] sortParams

The sort params

pageNumber

protected int pageNumber

The page number

pageSize

protected int pageSize

The page size

Constructor Detail

AbstractQuerier

public AbstractQuerier()

Method Detail

compareByFieldName

public abstract <D extends T> int compareByFieldName(D a,
                                                     D b,
                                                     String sortFieldName)

Compare by field name.

Type Parameters:

D - the type of the object a and b

Parameters:

a - the object a

b - the object b

sortFieldName - the sort field name

Returns:

the compare result

doSort

@NonNull
public <D extends T> List<D> doSort(List<D> list)

Do sort.

Specified by:

doSort in interface Querier<T>

Type Parameters:

D - the data type

Parameters:

list - the list

Returns:

the list after sort

doPaging

public <D extends T> List<D> doPaging(List<D> list)

Do paging.

Specified by:

doPaging in interface Querier<T>

Type Parameters:

D - the data type

Parameters:

list - the list

Returns:

the list after paging

getFromIndex

public int getFromIndex()

The starting index of the current page

Returns:

fromIndex

getToIndex

public int getToIndex(int fromIndex)

The end index of the current page

Parameters:

fromIndex - 起始索引

Returns:

toIndex 截止索引

getSortParams

public SortParam[] getSortParams()

Description copied from interface: Sortable

Gets sort params.

Specified by:

getSortParams in interface Sortable

Returns:

the sort params

setSortParams

public void setSortParams(SortParam... sortParams)

Description copied from interface: Sortable

Sets sort params.

Specified by:

setSortParams in interface Sortable

Parameters:

sortParams - the sort params

getPageNumber

public int getPageNumber()

Description copied from interface: Pageable

Gets page number

Specified by:

getPageNumber in interface Pageable

Returns:

the page number

setPageNumber

public void setPageNumber(int pageNumber)

Description copied from interface: Pageable

Sets page number

Specified by:

setPageNumber in interface Pageable

Parameters:

pageNumber - the page number

getPageSize

public int getPageSize()

Description copied from interface: Pageable

Gets page size

Specified by:

getPageSize in interface Pageable

Returns:

the page size

setPageSize

public void setPageSize(int pageSize)

Description copied from interface: Pageable

Sets page size

Specified by:

setPageSize in interface Pageable

Parameters:

pageSize - the page size