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java.lang.Objectorg.h2.util.CacheObject
org.h2.store.Page
public abstract class Page
A page. Format:
Field Summary | |
---|---|
protected int |
changeCount
When this page was changed the last time. |
static int |
FLAG_LAST
This is the last page of a chain. |
static int |
TYPE_BTREE_LEAF
A b-tree leaf page (without overflow: + FLAG_LAST). |
static int |
TYPE_BTREE_NODE
A b-tree node page (never has overflow pages). |
static int |
TYPE_DATA_LEAF
A data leaf page (without overflow: + FLAG_LAST). |
static int |
TYPE_DATA_NODE
A data node page (never has overflow pages). |
static int |
TYPE_DATA_OVERFLOW
A data overflow page (the last page: + FLAG_LAST). |
static int |
TYPE_EMPTY
An empty page. |
static int |
TYPE_FREE_LIST
A page containing a list of free pages (the last page: + FLAG_LAST). |
static int |
TYPE_STREAM_DATA
A stream data page. |
static int |
TYPE_STREAM_TRUNK
A stream trunk page. |
Fields inherited from class org.h2.util.CacheObject |
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cacheChained, cacheNext, cachePrevious |
Constructor Summary | |
---|---|
Page()
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Method Summary | ||
---|---|---|
protected static void |
add(int[] array,
int from,
int to,
int x)
Add a value to a subset of the array. |
|
boolean |
canMove()
If this page can be moved. |
|
protected static int[] |
insert(int[] old,
int oldSize,
int pos,
int x)
Insert a value in an array. |
|
protected static long[] |
insert(long[] old,
int oldSize,
int pos,
long x)
Insert a value in an array. |
|
static
|
insert(T[] old,
int oldSize,
int pos,
T x)
Insert a value in an array. |
|
abstract 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. |
|
protected static int[] |
remove(int[] old,
int oldSize,
int pos)
Delete a value in an array. |
|
protected static long[] |
remove(long[] old,
int oldSize,
int pos)
Delete a value in an array. |
|
static
|
remove(T[] old,
int oldSize,
int pos)
Delete a value in an array. |
|
abstract void |
write()
Write the page. |
Methods inherited from class org.h2.util.CacheObject |
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canRemove, compareTo, getMemory, getPos, isChanged, setChanged, setPos |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final int FLAG_LAST
public static final int TYPE_EMPTY
public static final int TYPE_DATA_LEAF
public static final int TYPE_DATA_NODE
public static final int TYPE_DATA_OVERFLOW
public static final int TYPE_BTREE_LEAF
public static final int TYPE_BTREE_NODE
public static final int TYPE_FREE_LIST
public static final int TYPE_STREAM_TRUNK
public static final int TYPE_STREAM_DATA
protected int changeCount
Constructor Detail |
---|
public Page()
Method Detail |
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public abstract void moveTo(Session session, int newPos)
session
- the sessionnewPos
- the new positionpublic abstract void write()
public static <T> T[] insert(T[] old, int oldSize, int pos, T x)
old
- the old arrayoldSize
- the old sizepos
- the positionx
- the value to insert
public static <T> T[] remove(T[] old, int oldSize, int pos)
old
- the old arrayoldSize
- the old sizepos
- the position
protected static long[] insert(long[] old, int oldSize, int pos, long x)
old
- the old arrayoldSize
- the old sizepos
- the positionx
- the value to insert
protected static long[] remove(long[] old, int oldSize, int pos)
old
- the old arrayoldSize
- the old sizepos
- the position
protected static int[] insert(int[] old, int oldSize, int pos, int x)
old
- the old arrayoldSize
- the old sizepos
- the positionx
- the value to insert
protected static int[] remove(int[] old, int oldSize, int pos)
old
- the old arrayoldSize
- the old sizepos
- the position
protected static void add(int[] array, int from, int to, int x)
array
- the arrayfrom
- the index of the first element (including)to
- the index of the last element (excluding)x
- the value to addpublic boolean canMove()
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