org.hibernate.id.enhanced

Class PooledLoThreadLocalOptimizer

java.lang.Object

org.hibernate.id.enhanced.AbstractOptimizer

org.hibernate.id.enhanced.PooledLoThreadLocalOptimizer

All Implemented Interfaces:

Optimizer

public class PooledLoThreadLocalOptimizer
extends AbstractOptimizer

Variation of PooledOptimizer which interprets the incoming database value as the lo value, rather than the hi value, as well as using thread local to cache the generation state.

Author:

Stuart Douglas, Scott Marlow, Steve Ebersole

See Also:

PooledOptimizer

Field Summary

Fields inherited from class org.hibernate.id.enhanced.AbstractOptimizer

incrementSize, returnClass

Constructor Summary

Constructors

Constructor and Description
PooledLoThreadLocalOptimizer(Class returnClass, int incrementSize) Constructs a PooledLoThreadLocalOptimizer.

Method Summary

Modifier and Type	Method and Description
boolean	applyIncrementSizeToSourceValues() Are increments to be applied to the values stored in the underlying value source?
Serializable	generate(AccessCallback callback) Generate an identifier value accounting for this specific optimization.
IntegralDataTypeHolder	getLastSourceValue() A common means to access the last value obtained from the underlying source.

Methods inherited from class org.hibernate.id.enhanced.AbstractOptimizer

getIncrementSize, getReturnClass

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PooledLoThreadLocalOptimizer

public PooledLoThreadLocalOptimizer(Class returnClass,
                                    int incrementSize)

Constructs a PooledLoThreadLocalOptimizer.

Parameters:

returnClass - The Java type of the values to be generated

incrementSize - The increment size.

Method Detail

generate

public Serializable generate(AccessCallback callback)

Description copied from interface: Optimizer

Generate an identifier value accounting for this specific optimization. All known implementors are synchronized. Consider carefully if a new implementation could drop this requirement.

Parameters:

callback - Callback to access the underlying value source.

Returns:

The generated identifier value.

getLastSourceValue

public IntegralDataTypeHolder getLastSourceValue()

Description copied from interface: Optimizer

A common means to access the last value obtained from the underlying source. This is intended for testing purposes, since accessing the underlying database source directly is much more difficult.

Returns:

The last value we obtained from the underlying source; null indicates we have not yet consulted with the source.

applyIncrementSizeToSourceValues

public boolean applyIncrementSizeToSourceValues()

Description copied from interface: Optimizer

Are increments to be applied to the values stored in the underlying value source?

Returns:

True if the values in the source are to be incremented according to the defined increment size; false otherwise, in which case the increment is totally an in memory construct.