Page
A page. Format:
- 0-3: parent page id (0 for root)
- 4-4: page type
- page-type specific data
| Methods |
|---|
| static void |
add(int[] array, int from, int to, int x)
Add a value to a subset of the array.
|
| static void |
add(int[] array, int from, int to, int x)
Add a value to a subset of the array.
Parameters:
array - the array
from - the index of the first element (including)
to - the index of the last element (excluding)
x - the value to add
|
| static T[] |
insert(T[] old, int oldSize, int pos, T x)
Insert a value in an array.
|
| static T[] |
insert(T[] old, int oldSize, int pos, T x)
Insert a value in an array. A new array is created if required.
Parameters:
old - the old array
oldSize - the old size
pos - the position
x - the value to insert
Returns:
the (new) array
|
| static long[] |
insert(long[] old, int oldSize, int pos, long x)
Insert a value in an array.
|
| static long[] |
insert(long[] old, int oldSize, int pos, long x)
Insert a value in an array. A new array is created if required.
Parameters:
old - the old array
oldSize - the old size
pos - the position
x - the value to insert
Returns:
the (new) array
|
| static int[] |
insert(int[] old, int oldSize, int pos, int x)
Insert a value in an array.
|
| static int[] |
insert(int[] old, int oldSize, int pos, int x)
Insert a value in an array. A new array is created if required.
Parameters:
old - the old array
oldSize - the old size
pos - the position
x - the value to insert
Returns:
the (new) array
|
| static T[] |
remove(T[] old, int oldSize, int pos)
Delete a value in an array.
|
| static T[] |
remove(T[] old, int oldSize, int pos)
Delete a value in an array. A new array is created if required.
Parameters:
old - the old array
oldSize - the old size
pos - the position
Returns:
the (new) array
|
| static long[] |
remove(long[] old, int oldSize, int pos)
Delete a value in an array.
|
| static long[] |
remove(long[] old, int oldSize, int pos)
Delete a value in an array. A new array is created if required.
Parameters:
old - the old array
oldSize - the old size
pos - the position
Returns:
the (new) array
|
| static int[] |
remove(int[] old, int oldSize, int pos)
Delete a value in an array.
|
| static int[] |
remove(int[] old, int oldSize, int pos)
Delete a value in an array. A new array is created if required.
Parameters:
old - the old array
oldSize - the old size
pos - the position
Returns:
the (new) array
|
| boolean |
canMove()
If this page can be moved.
|
| boolean |
canMove()
If this page can be moved. Transaction log and free-list pages can not.
Returns:
true if moving is allowed
|
| 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.
|
| 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.
Parameters:
session - the session
newPos - the new position
|
| void |
write()
Write the page.
|
| void |
write()
Write the page.
|
TYPE_EMPTY
= 0
An empty page.
TYPE_DATA_LEAF
= 1
A data leaf page (without overflow: + FLAG_LAST).
FLAG_LAST
= 16
This is the last page of a chain.
TYPE_DATA_NODE
= 2
A data node page (never has overflow pages).
TYPE_DATA_OVERFLOW
= 3
A data overflow page (the last page: + FLAG_LAST).
TYPE_BTREE_LEAF
= 4
A b-tree leaf page (without overflow: + FLAG_LAST).
TYPE_BTREE_NODE
= 5
A b-tree node page (never has overflow pages).
TYPE_FREE_LIST
= 6
A page containing a list of free pages (the last page: + FLAG_LAST).
TYPE_STREAM_TRUNK
= 7
A stream trunk page.
TYPE_STREAM_DATA
= 8
A stream data page.
changeCount
When this page was changed the last time.
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