org.gvsig.tools.paging
Class DefaultPagingCalculator

java.lang.Object
  org.gvsig.tools.paging.DefaultPagingCalculator

All Implemented Interfaces:

PagingCalculator

public class DefaultPagingCalculator
extends Object
implements PagingCalculator

Default PagingCalculator implementation.

Author:

gvSIG team

Nested Class Summary

Nested classes/interfaces inherited from interface org.gvsig.tools.paging.PagingCalculator

PagingCalculator.Sizeable

Field Summary

Fields inherited from interface org.gvsig.tools.paging.PagingCalculator

DEFAULT_PAGE_SIZE

Constructor Summary

DefaultPagingCalculator(PagingCalculator.Sizeable sizeable)
Creates a new DefaultPagingCalculator, with the default page size (PagingCalculator.DEFAULT_PAGE_SIZE), setting the current page to the first one.

DefaultPagingCalculator(PagingCalculator.Sizeable sizeable, int maxPageSize)
Creates a new DefaultPagingCalculator, setting the current page to the first one.

DefaultPagingCalculator(PagingCalculator.Sizeable sizeable, int maxPageSize, long currentPage)
Creates a new DefaultPagingCalculator .

Method Summary

long	getCurrentPage() Returns the number of the currently loaded page of data (zero based).
int	getCurrentPageSize() Returns the number of elements of the current page.
long	getInitialIndex() Returns the index of the initial element of the current page into all the elements.
protected long	getLastIndex()
int	getMaxPageSize() Returns the current maximum number of values per page.
long	getNumPages() Returns the number of pages available, calculated with the total number of elements and the maximum number of elements per page.
long	getTotalSize() Returns the number of elements of the entire set of data.
void	setCurrentPage(long currentPage) Sets the current page number (zero based), and loads the elements for that page.
void	setMaxPageSize(int maxPageSize) Sets the current maximum number of elements per page.

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultPagingCalculator

public DefaultPagingCalculator(PagingCalculator.Sizeable sizeable)

Creates a new DefaultPagingCalculator, with the default page size (PagingCalculator.DEFAULT_PAGE_SIZE), setting the current page to the first one.

DefaultPagingCalculator

public DefaultPagingCalculator(PagingCalculator.Sizeable sizeable,
                               int maxPageSize)

Creates a new DefaultPagingCalculator, setting the current page to the first one.

Parameters:

maxPageSize - the maximum page size

DefaultPagingCalculator

public DefaultPagingCalculator(PagingCalculator.Sizeable sizeable,
                               int maxPageSize,
                               long currentPage)

Creates a new DefaultPagingCalculator .

Parameters:

maxPageSize - the maximum page size

currentPage - the current page

Method Detail

getMaxPageSize

public int getMaxPageSize()

Description copied from interface: PagingCalculator

Returns the current maximum number of values per page.

Specified by:

getMaxPageSize in interface PagingCalculator

Returns:

the current maximum page size

setMaxPageSize

public void setMaxPageSize(int maxPageSize)

Description copied from interface: PagingCalculator

Sets the current maximum number of elements per page. As the page size changes, the current page of data is reloaded. All pages, but maybe the last one, will have this number of elements.

Specified by:

setMaxPageSize in interface PagingCalculator

Parameters:

maxPageSize - the maximum number of values per page

getCurrentPage

public long getCurrentPage()

Description copied from interface: PagingCalculator

Returns the number of the currently loaded page of data (zero based).

Specified by:

getCurrentPage in interface PagingCalculator

Returns:

the current page number

setCurrentPage

public void setCurrentPage(long currentPage)

Description copied from interface: PagingCalculator

Sets the current page number (zero based), and loads the elements for that page.

Specified by:

setCurrentPage in interface PagingCalculator

Parameters:

currentPage - the page to load

getInitialIndex

public long getInitialIndex()

Description copied from interface: PagingCalculator

Returns the index of the initial element of the current page into all the elements.

Specified by:

getInitialIndex in interface PagingCalculator

Returns:

the index of the initial element

getLastIndex

protected long getLastIndex()

getNumPages

public long getNumPages()

Description copied from interface: PagingCalculator

Returns the number of pages available, calculated with the total number of elements and the maximum number of elements per page.

Specified by:

getNumPages in interface PagingCalculator

Returns:

the number of pages available

getCurrentPageSize

public int getCurrentPageSize()

Description copied from interface: PagingCalculator

Returns the number of elements of the current page. All the pages, but maybe the last one, will have the maximum number of elements per page.

Specified by:

getCurrentPageSize in interface PagingCalculator

Returns:

the current page size

getTotalSize

public long getTotalSize()

Description copied from interface: PagingCalculator

Returns the number of elements of the entire set of data.

Specified by:

getTotalSize in interface PagingCalculator

Returns:

the number of elements