org.deegree_impl.io
Class GenericSQLIDGenerator

java.lang.Object
  org.deegree_impl.io.GenericSQLIDGenerator

All Implemented Interfaces:

IDGenerator

class GenericSQLIDGenerator

extends java.lang.Object

implements IDGenerator

Primary key generator for generic JDBC-connections.

NOTE: At the moment, every application has to take care of locking the table to prevent problems in multithreaded or multihosted applications.

Version:

$Revision: 1.2 $ $Date: 2004/03/11 12:52:42 $

Author:

Markus Schneider

Field Summary

(package private) java.sql.Connection	con
(package private) java.lang.String	fieldName
(package private) int	fieldType
(package private) boolean	isNumeric
(package private) java.lang.String	tableName

Constructor Summary

(package private)

GenericSQLIDGenerator(java.sql.Connection con, java.lang.String tableName, java.lang.String fieldName, int fieldType, boolean isNumeric) Constructs a new GenericSQLIDGenerator.

Method Summary

java.lang.Object	generateUniqueId() Generates a new id, suitable as a primary key for the next dataset.
private java.lang.String	incrementId(java.lang.String lastId) Returns the successor to the given id (string).

Methods inherited from class java.lang.Object

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

Field Detail

con

java.sql.Connection con

fieldType

int fieldType

isNumeric

boolean isNumeric

tableName

java.lang.String tableName

fieldName

java.lang.String fieldName

Constructor Detail

GenericSQLIDGenerator

GenericSQLIDGenerator(java.sql.Connection con,
                      java.lang.String tableName,
                      java.lang.String fieldName,
                      int fieldType,
                      boolean isNumeric)

Constructs a new GenericSQLIDGenerator.

Parameters:

con -

fieldType -

Method Detail

incrementId

private java.lang.String incrementId(java.lang.String lastId)

Returns the successor to the given id (string). Valid characters in the id-string are: 0-9, a-z, A-Z. Every other character may result in an exception.

Parameters:

lastId -

Returns:

generateUniqueId

public java.lang.Object generateUniqueId()
                                  throws java.sql.SQLException

Generates a new id, suitable as a primary key for the next dataset.

Specified by:

generateUniqueId in interface IDGenerator

Returns:

Id, the object type depends on the database field used as primary key

Throws:

java.sql.SQLException