Jackcess 5.2.0 · io.github.spannm.jackcess.impl.TempPageHolder

Modifier and Type	Field and Description
private final TempBufferHolder	buffer
private int	bufferModCount the last "modification" count of the buffer that this holder observed.
private int	pageNumber

Access	Constructor and Description
private	TempPageHolder(TempBufferHolder.Type type)

Method Summary

Modifier and Type	Method and Description
public void	clear() Forces any current page data to be disregarded (any `getPage`/`setPage` call must reload page data) and releases any referenced memory.
public ByteBuffer	Returns: the page for the current page number, reading as necessary, position and limit are unchanged getPage(PageChannel pageChannel) Returns the page for the current page number, reading as necessary, position and limit are unchanged.
public int	Returns: the currently set page number getPageNumber() Returns the currently set page number.
public void	invalidate() Forces any current page data to be disregarded (any `getPage`/`setPage` call must reload page data).
public static TempPageHolder	newHolder(TempBufferHolder.Type the type of reference desired for any create page buffers type) Creates a new TempPageHolder.
public void	possiblyInvalidate(int modifiedPageNumber, ByteBuffer modifiedBuffer) Forces any current page data to be disregarded if it matches the given page number (any `getPage`/`setPage` call must reload page data) and is not the given buffer.
public ByteBuffer	withNewPage(PageChannel pageChannel) Allocates a new buffer in the database (with undefined data) and returns a new empty buffer.
public ByteBuffer	Returns: the page for the new page number, reading as necessary, resets position withPage(PageChannel pageChannel, int newPageNumber) Sets the current page number and returns that page
private ByteBuffer	withPage(PageChannel pageChannel, int newPageNumber, boolean rewind)

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

buffer	back to summary
private final TempBufferHolder buffer

bufferModCount	back to summary
private int bufferModCount the last "modification" count of the buffer that this holder observed. this is tracked so that the page data can be re-read if the underlying buffer has been discarded since the last page read

pageNumber	back to summary
private int pageNumber

TempPageHolder	back to summary
private TempPageHolder(TempBufferHolder.Type type)

Method Detail

clear	back to summary
public void clear() Forces any current page data to be disregarded (any `getPage`/`setPage` call must reload page data) and releases any referenced memory.

getPage	back to summary
public ByteBuffer getPage(PageChannel pageChannel) throws IOException Returns the page for the current page number, reading as necessary, position and limit are unchanged. Returns:ByteBuffer the page for the current page number, reading as necessary, position and limit are unchanged

getPage

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public ByteBuffer getPage(PageChannel pageChannel) throws IOException

Returns the page for the current page number, reading as necessary, position and limit are unchanged.

Returns:ByteBuffer: the page for the current page number, reading as necessary, position and limit are unchanged

getPageNumber	back to summary
public int getPageNumber() Returns the currently set page number. Returns:int the currently set page number

getPageNumber

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public int getPageNumber()

Returns the currently set page number.

Returns:int: the currently set page number

invalidate	back to summary
public void invalidate() Forces any current page data to be disregarded (any `getPage`/`setPage` call must reload page data). Does not necessarily release any memory.

newHolder	back to summary
public static TempPageHolder newHolder(TempBufferHolder.Type type) Creates a new TempPageHolder. Parameters type:TempBufferHolder.Type the type of reference desired for any create page buffers

newHolder

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public static TempPageHolder newHolder(TempBufferHolder.Type type)

Creates a new TempPageHolder.

Parameters

type:TempBufferHolder.Type: the type of reference desired for any create page buffers

possiblyInvalidate	back to summary
public void possiblyInvalidate(int modifiedPageNumber, ByteBuffer modifiedBuffer) Forces any current page data to be disregarded if it matches the given page number (any `getPage`/`setPage` call must reload page data) and is not the given buffer. Does not necessarily release any memory.

withNewPage	back to summary
public ByteBuffer withNewPage(PageChannel pageChannel) throws IOException Allocates a new buffer in the database (with undefined data) and returns a new empty buffer.

withPage	back to summary
public ByteBuffer withPage(PageChannel pageChannel, int newPageNumber) throws IOException Sets the current page number and returns that page Returns:ByteBuffer the page for the new page number, reading as necessary, resets position

withPage

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public ByteBuffer withPage(PageChannel pageChannel, int newPageNumber) throws IOException

Sets the current page number and returns that page

Returns:ByteBuffer: the page for the new page number, reading as necessary, resets position

withPage	back to summary
private ByteBuffer withPage(PageChannel pageChannel, int newPageNumber, boolean rewind) throws IOException

public final Class TempPageHolder

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail