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org.jdbf.engine.keygen
Class HighLowKeyGenerator  

java.lang.Object
  org.jdbf.engine.keygen.HighLowKeyGenerator

All Implemented Interfaces:

KeyGenerator

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public class HighLowKeyGenerator

extends java.lang.Object

implements KeyGenerator

This is not the HighLow approach described by Scott Ambler in Mapping Objects To Relational Databases. Scott Ambler calls this the key-values approach, but others use "HighLow" to describe a modified key-values approach which does not use database access for each key.

Version:

$id$

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Field Summary
private  java.util.Map	keys           Holds a KeyKeeper for each table.

 

Fields inherited from interface org.jdbf.engine.keygen.KeyGenerator

ONE

 

Constructor Summary

HighLowKeyGenerator()

 

Method Summary
java.lang.Object	generateKey(org.jdbf.engine.repository.RepositoryView view, java.sql.Connection conn, java.lang.String vendor)           Returns a generated key.
boolean	isBeforeInsert()           Generation of key is before insert.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

keys

private java.util.Map keys

Holds a KeyKeeper for each table. The table's name is the key and the value is a KeyKeeper.

Constructor Detail

HighLowKeyGenerator

public HighLowKeyGenerator()

Method Detail

isBeforeInsert

public boolean isBeforeInsert()

Generation of key is before insert.

Specified by:

isBeforeInsert in interface KeyGenerator

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generateKey

public java.lang.Object generateKey(org.jdbf.engine.repository.RepositoryView view,
                                    java.sql.Connection conn,
                                    java.lang.String vendor)
                             throws org.jdbf.engine.mapping.MappingException

Returns a generated key.

Specified by:

generateKey in interface KeyGenerator

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> jdbf >> engine >> [ keygen overview ]	PREV CLASS  NEXT CLASS
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