org.apache.derby.iapi.store.raw
Class ContainerLock

java.lang.Object
  extended by org.apache.derby.iapi.store.raw.ContainerLock

public final class ContainerLock
extends java.lang.Object

A ContainerLock represents a qualifier that is to be used when locking a container through a ContainerHandle.
MT - Immutable

See Also:
ContainerHandle, LockingPolicy

Field Summary
private static boolean[][] C_COMPAT
          Container lock compatibility table.
static int C_NUMBER
          Number of types of container locks.
static ContainerLock CIS
          Container Intent Shared lock
static ContainerLock CIX
          Container Intent Exclusive lock
private  int compat
          Bit mask which represents the lock types that are compatible with this lock type.
static ContainerLock CS
          Container Shared lock
static ContainerLock CU
          Container Update lock
static ContainerLock CX
          Container Exclusive lock
private static java.lang.String[] shortnames
           
private  int type
          Integer representation of the type of the lock.
private  int typeBit
          Bit mask with one bit set.
 
Constructor Summary
private ContainerLock(int type)
           
 
Method Summary
 int getType()
          Get an integer representation of the type of the lock.
 boolean isCompatible(ContainerLock granted)
           
 java.lang.String toString()
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

type

private final int type
Integer representation of the type of the lock.


typeBit

private final int typeBit
Bit mask with one bit set. The position of the bit tells the type of the lock.


compat

private final int compat
Bit mask which represents the lock types that are compatible with this lock type.


C_NUMBER

public static final int C_NUMBER
Number of types of container locks.

See Also:
Constant Field Values

C_COMPAT

private static final boolean[][] C_COMPAT
Container lock compatibility table.


shortnames

private static java.lang.String[] shortnames

CIS

public static final ContainerLock CIS
Container Intent Shared lock


CIX

public static final ContainerLock CIX
Container Intent Exclusive lock


CS

public static final ContainerLock CS
Container Shared lock


CU

public static final ContainerLock CU
Container Update lock


CX

public static final ContainerLock CX
Container Exclusive lock

Constructor Detail

ContainerLock

private ContainerLock(int type)
Method Detail

getType

public int getType()
Get an integer representation of the type of the lock. This method is guaranteed to return an integer >= 0 and < C_NUMBER. No correlation between the value and one of the static variables (CIS etc.) is guaranteed, except that the values returned do not change.


isCompatible

public boolean isCompatible(ContainerLock granted)

toString

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

Built on Thu 2012-03-29 21:53:33+0000, from revision ???

Apache Derby V10.6 Internals - Copyright © 2004,2007 The Apache Software Foundation. All Rights Reserved.