Package org.apache.ignite.internal.cache.query.index.sorted

Class MetaPageInfo

java.lang.Object

org.apache.ignite.internal.cache.query.index.sorted.MetaPageInfo

public class MetaPageInfo
extends Object

Meta page stores meta data about InlineIndexTree.

Constructor Summary

Constructors

Constructor	Description
MetaPageInfo(BPlusMetaIO io, long pageAddr)

Method Summary

Modifier and Type	Method	Description
boolean	flagsSupported()
boolean	inlineObjectHash()
boolean	inlineObjectSupported()
int	inlineSize()
static MetaPageInfo	read(long metaPageId, int grpId, PageMemory pageMemory)	Reads meta page info from page memory.
boolean	useUnwrappedPk()
void	write(long metaPageId, int grpId, PageMemory pageMemory)	Writes meta page info into page memory.

Methods inherited from class java.lang.Object

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

Constructor Detail

MetaPageInfo

public MetaPageInfo(BPlusMetaIO io,
                    long pageAddr)

Parameters:

io - Metapage IO.

pageAddr - Page address.

Method Detail

inlineSize

public int inlineSize()

Returns:

Inline size.

useUnwrappedPk

public boolean useUnwrappedPk()

Returns:

true In case use unwrapped PK for indexes.

flagsSupported

public boolean flagsSupported()

Returns:

true In case metapage contains flags.

inlineObjectSupported

public boolean inlineObjectSupported()

Returns:

true In case inline object is supported.

inlineObjectHash

public boolean inlineObjectHash()

Returns:

true In case inline object is supported.

read

public static MetaPageInfo read(long metaPageId,
                                int grpId,
                                PageMemory pageMemory)
                         throws IgniteCheckedException

Reads meta page info from page memory.

Parameters:

metaPageId - Meta page ID.

grpId - Cache group ID.

pageMemory - Page memory.

Returns:

Meta page info.

Throws:

IgniteCheckedException - If something went wrong.

write

public void write(long metaPageId,
                  int grpId,
                  PageMemory pageMemory)
           throws IgniteCheckedException

Writes meta page info into page memory.

Parameters:

metaPageId - Meta page ID.

grpId - Cache group ID.

pageMemory - Page memory.

Throws:

IgniteCheckedException - If something went wrong.