org.deegree.io.datastore.sql.idgenerator
Class DBSeqIdGenerator

java.lang.Object
  org.deegree.io.datastore.idgenerator.IdGenerator
      org.deegree.io.datastore.sql.idgenerator.DBSeqIdGenerator

public class DBSeqIdGenerator
extends IdGenerator

Feature id generator that uses an SQL sequence to create new values.

Version:

$Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $

Author:

Markus Schneider , last edited by: $Author: mschneider $

Field Summary

Fields inherited from class org.deegree.io.datastore.idgenerator.IdGenerator

ft, params, TYPE_UUID

Constructor Summary

DBSeqIdGenerator(Properties params)
Creates a new DBSeqIdGenerator instance.

Method Summary

Object	getNewId(DatastoreTransaction ta) Returns a new primary key.
FeatureId	getNewId(MappedFeatureType ft, DatastoreTransaction ta) Returns a new id for a feature of the given type.
String	getSequenceName() Returns the name of the used sequence.

Methods inherited from class org.deegree.io.datastore.idgenerator.IdGenerator

getInstance

Methods inherited from class java.lang.Object

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

Constructor Detail

DBSeqIdGenerator

public DBSeqIdGenerator(Properties params)
                 throws IdGenerationException

Creates a new DBSeqIdGenerator instance.

Supported configuration parameters:

Name	optional?	Usage
sequence	no	name of the SQL sequence to be used
offset	yes	integer value, if omitted the next value of the sequence is used (default) otherwise the current value + offset is used

Parameters:

params - configuration parameters

Throws:

IdGenerationException

Method Detail

getSequenceName

public String getSequenceName()

Returns the name of the used sequence.

Returns:

the name of the used sequence

getNewId

public Object getNewId(DatastoreTransaction ta)
                throws IdGenerationException

Returns a new primary key.

Specified by:

getNewId in class IdGenerator

Parameters:

ta - datastore transaction (context)

Returns:

a new primary key.

Throws:

IdGenerationException - if the generation of the id could not be performed

getNewId

public FeatureId getNewId(MappedFeatureType ft,
                          DatastoreTransaction ta)
                   throws IdGenerationException

Returns a new id for a feature of the given type.

Specified by:

getNewId in class IdGenerator

Parameters:

ft - (mapped) feature type

ta - datastore transaction (context)

Returns:

a new feature id.

Throws:

IdGenerationException - if the generation of the id could not be performed