org.apache.directory.mavibot.btree

Enum BTreeTypeEnum

java.lang.Object

java.lang.Enum<BTreeTypeEnum>

org.apache.directory.mavibot.btree.BTreeTypeEnum

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<BTreeTypeEnum>

public enum BTreeTypeEnum
extends java.lang.Enum<BTreeTypeEnum>

An enum to describe the B-tree type. We have three possible type :

• IN_MEMORY : the B-tree will remain in memory, and won't be persisted on disk
• BACKED_ON_DISK : the B-tree is in memory, but will be persisted on disk
• PERSISTED : the B-tree is managed by a RecordManager, and some pages may be swapped out from memory on demand
• PERSISTED_SUB : The B-tree is a Persisted B-tree, but a Sub B-tree one
• PERSISTED_MANAGEMENT : This is a Persisted B-tree used to manage the other B-trees

Enum Constant Summary

Enum Constants

Enum Constant and Description
BACKED_ON_DISK In-memory B-tree but saved on disk
BTREE_OF_BTREES Persisted Management B-tree
COPIED_PAGES_BTREE Persisted Management B-tree
IN_MEMORY Pure in-memory B-tree, not persisted on disk
PERSISTED Persisted B-tree
PERSISTED_SUB Persisted sub B-tree

Method Summary

Modifier and Type	Method and Description
static BTreeTypeEnum	valueOf(java.lang.String name) Returns the enum constant of this type with the specified name.
static BTreeTypeEnum[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

IN_MEMORY

public static final BTreeTypeEnum IN_MEMORY

Pure in-memory B-tree, not persisted on disk

PERSISTED

public static final BTreeTypeEnum PERSISTED

Persisted B-tree

PERSISTED_SUB

public static final BTreeTypeEnum PERSISTED_SUB

Persisted sub B-tree

BTREE_OF_BTREES

public static final BTreeTypeEnum BTREE_OF_BTREES

Persisted Management B-tree

COPIED_PAGES_BTREE

public static final BTreeTypeEnum COPIED_PAGES_BTREE

Persisted Management B-tree

BACKED_ON_DISK

public static final BTreeTypeEnum BACKED_ON_DISK

In-memory B-tree but saved on disk

Method Detail

values

public static BTreeTypeEnum[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (BTreeTypeEnum c : BTreeTypeEnum.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static BTreeTypeEnum valueOf(java.lang.String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

java.lang.IllegalArgumentException - if this enum type has no constant with the specified name

java.lang.NullPointerException - if the argument is null