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org.hsqldb
Class PointerNode  

java.lang.Object
  org.hsqldb.Node
      org.hsqldb.MemoryNode
          org.hsqldb.PointerNode

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class PointerNode

extends MemoryNode

Text table node implementation.
Nodes for the AVL tree are all built and kept in memory while the actual row data is accessed through TextCache from disk.
This extends MemoryNode by maintaining a disk based offset for the Row data. (fredt@users)

Version:

1.7.1

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Field Summary
protected  int	iBalance
private  int	iData
private  int	iId
private  int	iRight
protected  Node	nLeft
(package private)  Node	nNext
(package private) static int	NO_POS
protected  Node	nParent
protected  Node	nRight
protected  Row	rData
private  Table	tTable
(package private) static int	TYPE_DISK
(package private) static int	TYPE_MEMORY
(package private) static int	TYPE_POINTER

 

Constructor Summary
(package private)	PointerNode(CachedRow r)

 

Method Summary
(package private)  void	delete()           Method declaration
(package private)  boolean	equals(Node n)
private  Node	findNode(int pos, int id)
(package private)  boolean	from()           Method declaration
(package private)  int	getBalance()
(package private)  java.lang.Object[]	getData()           Returns the data held in the table Row for this Node
(package private)  int	getKey()           File offset of Node.
(package private)  Node	getLeft()
(package private)  Node	getParent()
(package private)  Node	getRight()
(package private)  Node	getRightPointer()           Used with PointerNode objects only
(package private)  Row	getRow()
(package private)  boolean	isRoot()
(package private) static Node	newNode(Row r, DatabaseRowInputInterface in, int id, Table t)
(package private) static Node	newNode(Row r, int id, Table t)
(package private)  void	setBalance(int b)
(package private)  void	setKey(int pos)           Used with CachedRow objects only
(package private)  void	setLeft(Node n)
(package private)  void	setNextKey(int i)           Used at construction
(package private)  void	setParent(Node n)
(package private)  void	setRight(Node n)
(package private)  void	write(DatabaseRowOutputInterface out)           Method declaration

 

Methods inherited from class java.lang.Object

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

 

Field Detail

iId

private int iId

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iData

private int iData

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tTable

private Table tTable

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iRight

private int iRight

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nLeft

protected Node nLeft

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nRight

protected Node nRight

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nParent

protected Node nParent

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TYPE_MEMORY

static final int TYPE_MEMORY

See Also:

Constant Field Values

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TYPE_DISK

static final int TYPE_DISK

See Also:

Constant Field Values

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TYPE_POINTER

static final int TYPE_POINTER

See Also:

Constant Field Values

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NO_POS

static final int NO_POS

See Also:

Constant Field Values

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iBalance

protected int iBalance

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rData

protected Row rData

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nNext

Node nNext

Constructor Detail

PointerNode

PointerNode(CachedRow r)

Method Detail

delete

void delete()

Description copied from class: MemoryNode

Method declaration

Overrides:

delete in class MemoryNode

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getKey

int getKey()

Description copied from class: Node

File offset of Node. Used with CachedRow objects only

Overrides:

getKey in class MemoryNode

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setKey

void setKey(int pos)

Description copied from class: Node

Used with CachedRow objects only

Overrides:

setKey in class MemoryNode

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getRow

Row getRow()
     throws java.sql.SQLException

Overrides:

getRow in class MemoryNode

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findNode

private Node findNode(int pos,
                      int id)
               throws java.sql.SQLException

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getRight

Node getRight()
        throws java.sql.SQLException

Overrides:

getRight in class MemoryNode

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getRightPointer

Node getRightPointer()
               throws java.sql.SQLException

Used with PointerNode objects only

Overrides:

getRightPointer in class MemoryNode

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setRight

void setRight(Node n)
        throws java.sql.SQLException

Overrides:

setRight in class MemoryNode

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setNextKey

void setNextKey(int i)
          throws java.sql.SQLException

Used at construction

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getData

java.lang.Object[] getData()
                     throws java.sql.SQLException

Description copied from class: Node

Returns the data held in the table Row for this Node

Overrides:

getData in class MemoryNode

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equals

boolean equals(Node n)
         throws java.sql.SQLException

Overrides:

equals in class MemoryNode

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getLeft

Node getLeft()
       throws java.sql.SQLException

Specified by:

getLeft in class Node

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setLeft

void setLeft(Node n)
       throws java.sql.SQLException

Specified by:

setLeft in class Node

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getParent

Node getParent()
         throws java.sql.SQLException

Specified by:

getParent in class Node

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isRoot

boolean isRoot()

Specified by:

isRoot in class Node

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setParent

void setParent(Node n)
         throws java.sql.SQLException

Specified by:

setParent in class Node

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setBalance

void setBalance(int b)
          throws java.sql.SQLException

Specified by:

setBalance in class Node

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from

boolean from()
       throws java.sql.SQLException

Description copied from class: Node

Method declaration

Specified by:

from in class Node

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write

void write(DatabaseRowOutputInterface out)
     throws java.io.IOException,
            java.sql.SQLException

Method declaration

Specified by:

write in class Node

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newNode

static final Node newNode(Row r,
                          int id,
                          Table t)

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newNode

static final Node newNode(Row r,
                          DatabaseRowInputInterface in,
                          int id,
                          Table t)
                   throws java.io.IOException,
                          java.sql.SQLException

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getBalance

final int getBalance()
              throws java.sql.SQLException

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> [ hsqldb overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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