File Doc Category Size Date Package
Optimizer.java API Doc Hibernate 3.2.5 1770 Thu Mar 15 04:33:16 GMT 2007 org.hibernate.id.enhanced

Optimizer

public interface Optimizer

Performs optimization on an optimizable identifier generator. Typically this optimization takes the form of trying to ensure we do not have to hit the database on each and every request to get an identifier value.

Optimizers work on constructor injection. They should provide a constructor with the following arguments

java.lang.Class - The return type for the generated values
int - The increment size

author: Steve Ebersole

Fields Summary
Constructors Summary
Methods Summary
public boolean applyIncrementSizeToSourceValues()
Are increments to be applied to the values stored in the underlying value source?
return
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.
public java.io.Serializable generate(AccessCallback callback)
Generate an identifier value accounting for this specific optimization.
param
callback Callback to access the underlying value source.
return
The generated identifier value.
public int getIncrementSize()
Retrieves the defined increment size.
return
The increment size.
public long getLastSourceValue()
A common means to access the last value obtained from the underlying source. This is intended for testing purposes, since accessing the unerlying database source directly is much more difficult.
return
The last value we obtained from the underlying source; -1 indicates we have not yet consulted with the source.