org.h2.store
Class PageStreamData

java.lang.Object
  extended by org.h2.util.CacheObject
      extended by org.h2.store.Record
          extended by org.h2.store.Page
              extended by org.h2.store.PageStreamData

public class PageStreamData
extends Page

A data page of a stream. The format is:


Field Summary
 
Fields inherited from class org.h2.store.Page
FLAG_LAST, TYPE_BTREE_LEAF, TYPE_BTREE_NODE, TYPE_DATA_LEAF, TYPE_DATA_NODE, TYPE_DATA_OVERFLOW, TYPE_EMPTY, TYPE_FREE_LIST, TYPE_STREAM_DATA, TYPE_STREAM_TRUNK
 
Fields inherited from class org.h2.util.CacheObject
blockCount, cacheQueue, chained, next, previous
 
Method Summary
 int getByteCount(DataPage dummy)
          Get the number of bytes required for the data if the given data page would be used.
 int getMemorySize()
          Get the estimated memory size.
 void moveTo(Session session, int newPos)
          Copy the data to a new location, change the parent to point to the new location, and free up the current page.
 java.lang.String toString()
           
 void write(DataPage buff)
          Write the record to the data page.
 
Methods inherited from class org.h2.store.Record
canRemove, commit, getSessionId, getStorageId, isDeleted, isEmpty, isLogWritten, prepareWrite, setDeleted, setLastLog, setLogWritten, setSessionId, setStorageId
 
Methods inherited from class org.h2.util.CacheObject
getBlockCount, getPos, isChanged, isPinned, setBlockCount, setChanged, setPos, sort
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Method Detail

getByteCount

public int getByteCount(DataPage dummy)
Description copied from class: Record
Get the number of bytes required for the data if the given data page would be used.

Specified by:
getByteCount in class Record
Parameters:
dummy - the template data page
Returns:
the number of bytes

write

public void write(DataPage buff)
           throws java.sql.SQLException
Description copied from class: Record
Write the record to the data page.

Specified by:
write in class Record
Parameters:
buff - the data page
Throws:
java.sql.SQLException

getMemorySize

public int getMemorySize()
Get the estimated memory size.

Overrides:
getMemorySize in class CacheObject
Returns:
number of double words (4 bytes)

moveTo

public void moveTo(Session session,
                   int newPos)
Description copied from class: Page
Copy the data to a new location, change the parent to point to the new location, and free up the current page.

Specified by:
moveTo in class Page
Parameters:
session - the session
newPos - the new position

toString

public java.lang.String toString()
Overrides:
toString in class java.lang.Object