Top Description Fields Constructors Methods

org.apache.derby.iapi.store.raw

public final Class ContainerLock

Class Inheritance

extends Object

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

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

Modifier and Type	Field and Description
private static final boolean[][]	C_COMPAT Container lock compatibility table.
public static final int	C_NUMBER Number of types of container locks.
public static final ContainerLock	CIS Container Intent Shared lock
public static final ContainerLock	CIX Container Intent Exclusive lock
private final int	compat Bit mask which represents the lock types that are compatible with this lock type.
public static final ContainerLock	CS Container Shared lock
public static final ContainerLock	CU Container Update lock
public static final ContainerLock	CX Container Exclusive lock
private static String[]	shortnames
private final int	type Integer representation of the type of the lock.
private final int	typeBit Bit mask with one bit set.

Constructor Summary

Access	Constructor and Description
private	ContainerLock(int type)

Method Summary

Modifier and Type	Method and Description
public int	getType() Get an integer representation of the type of the lock.
public boolean	isCompatible(ContainerLock granted)
public String	toString() Overrides java.lang.Object.toString. Returns a string representation of the object.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll wait wait wait

Field Detail

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

C_NUMBER	back to summary
public static final int C_NUMBER Number of types of container locks.

CIS	back to summary
public static final ContainerLock CIS Container Intent Shared lock

CIX	back to summary
public static final ContainerLock CIX Container Intent Exclusive lock

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

CS	back to summary
public static final ContainerLock CS Container Shared lock

CU	back to summary
public static final ContainerLock CU Container Update lock

CX	back to summary
public static final ContainerLock CX Container Exclusive lock

shortnames	back to summary
private static String[] shortnames

type	back to summary
private final int type Integer representation of the type of the lock.

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

Constructor Detail

ContainerLock	back to summary
private ContainerLock(int type)

Method Detail

getType	back to summary
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	back to summary
public boolean isCompatible(ContainerLock granted)

toString back to summary

public String toString()

Overrides java.lang.Object.toString.

Doc from java.lang.Object.toString.

Returns a string representation of the object. Satisfying this method's contract implies a non-null result must be returned.

Returns:String: a string representation of the object