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org.jdbf.engine.keygen
Class MaxKeyGenerator  

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

All Implemented Interfaces:

KeyGenerator

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public class MaxKeyGenerator

extends java.lang.Object

implements KeyGenerator

MaxKeyGenerator representes the key generator that creates OID Obtains a key by adding 1 to the highest key in the table. This class has been developed on Max approach described by Scott Ambler in Mapping Objects To Relational Databases.

Version:

$id$

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Field Summary

 

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

ONE

 

Constructor Summary

MaxKeyGenerator()

 

Method Summary
java.lang.Object	generateKey(org.jdbf.engine.repository.RepositoryView view, java.sql.Connection conn, java.lang.String vendor)           Obtains a key by adding 1 to the highest key in the table.
boolean	isBeforeInsert()           Return true if before insert., false otherwise

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

MaxKeyGenerator

public MaxKeyGenerator()

Method Detail

isBeforeInsert

public boolean isBeforeInsert()

Return true if before insert., false otherwise

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

Obtains a key by adding 1 to the highest key in the table. This method obtain a key creating a MAX select statement.

Specified by:

generateKey in interface KeyGenerator

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