org.openbandy.io.storage
Class DatabaseStorage

java.lang.Object
  org.openbandy.io.storage.Storage
      org.openbandy.io.storage.DatabaseStorage

public class DatabaseStorage
extends Storage

The DatabaseStorage is an extension to the Storage. Thereby, it particularly implements the logic for the methods existsInStorage, deleteShallow and reset. All these methods are realized using a temporary DatabaseConnection to execute the necessary SQL statements.

(c) Copyright Philipp Bolliger 2007, ALL RIGHTS RESERVED.

Version:

1.0

Author:

Philipp Bolliger (philipp@bolliger.name)

Method Summary

static java.lang.String	apostrophe(java.lang.String value)
static java.lang.String	bracket(java.lang.String value)
void	closeConnection(DatabaseConnection connection)
boolean	deleteShallow(Serializable serializable) Deletes the serializable object, but not the reference objects.
int	existsInStorage(Serializable serializable) Return 0 if databaseSerializable does not already exist in database.
DatabaseConnection	getDatabaseConnection(java.lang.String owner)
static DatabaseStorage	getInstance()
static java.lang.String	getTableName(Serializable serializable)
static java.lang.String	identifierApostroph(java.lang.String value)
boolean	isEmpty() Returns true if no object is contained within the storage.
void	reset() Reset the storage with all it's meta structures and caches.

Methods inherited from class org.openbandy.io.storage.Storage

closeAllConnections, delete, removeConnection, size

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static DatabaseStorage getInstance()

getDatabaseConnection

public DatabaseConnection getDatabaseConnection(java.lang.String owner)

Parameters:

owner - A string describing the user of the connection.

Returns:

A new and open DatabaseConnection. null if not able to connect.

existsInStorage

public int existsInStorage(Serializable serializable)

Return 0 if databaseSerializable does not already exist in database. If databaseSerializable exist, this method returns the id according to databaseSerializable.getKeyName().

Specified by:

existsInStorage in class Storage

Parameters:

databaseSerializable -

Returns:

closeConnection

public void closeConnection(DatabaseConnection connection)

deleteShallow

public boolean deleteShallow(Serializable serializable)

Description copied from class: Storage

Deletes the serializable object, but not the reference objects.

Specified by:

deleteShallow in class Storage

Returns:

true if deletion was successful

reset

public void reset()

Description copied from class: Storage

Reset the storage with all it's meta structures and caches. Use carefully!

Specified by:

reset in class Storage

isEmpty

public boolean isEmpty()

Description copied from class: Storage

Returns true if no object is contained within the storage.

Specified by:

isEmpty in class Storage

identifierApostroph

public static java.lang.String identifierApostroph(java.lang.String value)

apostrophe

public static java.lang.String apostrophe(java.lang.String value)

bracket

public static java.lang.String bracket(java.lang.String value)

getTableName

public static java.lang.String getTableName(Serializable serializable)