org.castor.ddlgen.keygenerator
Class IdentityKeyGenerator

java.lang.Object
  extended by org.castor.ddlgen.schemaobject.AbstractSchemaObject
      extended by org.castor.ddlgen.schemaobject.KeyGenerator
          extended by org.castor.ddlgen.keygenerator.IdentityKeyGenerator
All Implemented Interfaces:
SchemaObject

public final class IdentityKeyGenerator
extends KeyGenerator

IDENTITY key generator can be used only with autoincrement primary key columns (identities) with Sybase ASE/ASA, MS SQL Server, MySQL and Hypersonic SQL. After the insert the key generator selects system variable @@identity which contains the last identity value for the current database connection. In the case of MySQL and Hypersonic SQL the system functions LAST_INSERT_ID() and IDENTITY() are called, respectively.

Since:
1.1
Version:
$Revision: 5951 $ $Date: 2006-04-25 16:09:10 -0600 (Tue, 25 Apr 2006) $
Author:
Le Duc Bao, Ralf Joachim

Field Summary
static java.lang.String ALGORITHM_NAME
          Name of key generator algorithm.
 
Fields inherited from class org.castor.ddlgen.schemaobject.AbstractSchemaObject
HASHFACTOR
 
Constructor Summary
IdentityKeyGenerator()
          Constructor for default IDENTITY key generator.
IdentityKeyGenerator(KeyGeneratorDef definition)
          Constructor for IDENTITY key generator specified by given defintion.
 
Method Summary
 void toCreateDDL(DDLWriter writer)
          Build create script for the schema object.
 void toDropDDL(DDLWriter writer)
          Build drop script for the schema object.
 
Methods inherited from class org.castor.ddlgen.schemaobject.KeyGenerator
equals, getAlias, getTable, hashCode, merge, setAlias, setTable
 
Methods inherited from class org.castor.ddlgen.schemaobject.AbstractSchemaObject
equals, getConfiguration, getName, setConfiguration, setName
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

ALGORITHM_NAME

public static final java.lang.String ALGORITHM_NAME
Name of key generator algorithm.

See Also:
Constant Field Values
Constructor Detail

IdentityKeyGenerator

public IdentityKeyGenerator()
Constructor for default IDENTITY key generator.


IdentityKeyGenerator

public IdentityKeyGenerator(KeyGeneratorDef definition)
Constructor for IDENTITY key generator specified by given defintion.

Parameters:
definition - Key generator definition.
Method Detail

toCreateDDL

public void toCreateDDL(DDLWriter writer)
Build create script for the schema object.

Parameters:
writer - DDLWriter to write schema objects to.

toDropDDL

public void toDropDDL(DDLWriter writer)
Build drop script for the schema object.

Parameters:
writer - DDLWriter to write schema objects to.


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