org.opensubsystems.core.persist.db
Class DatabaseUpdateSingleDataObjectOperation

java.lang.Object
  org.opensubsystems.core.persist.db.DatabaseOperation
      org.opensubsystems.core.persist.db.DatabaseUpdateOperation
          org.opensubsystems.core.persist.db.DatabaseUpdateSingleDataObjectOperation

All Implemented Interfaces:

DatabaseOperations

public class DatabaseUpdateSingleDataObjectOperation
extends DatabaseUpdateOperation

Adapter to simplify writing of database updates that updates single data object to the database. The adapter takes care of requesting and returning connections, transaction management and exception handling. To use this adapter you just need to create an instance of this class and call executeUpdate method. Example of method in factory which creates single data object public int create( final BasicDataObject data ) throws OSSException { DatabaseUpdateSingleDataObjectOperation dbop = new DatabaseUpdateSingleDataObjectOperation( this, m_schema.getInsertMyData(), m_schema.isInDomain(), m_schema, dataType, data, "MyDataName"); dbop.executeUpdate(); return ((Integer)dbop.getReturnData()).intValue(); }

Version:

$Id: DatabaseUpdateSingleDataObjectOperation.java,v 1.10 2007/01/28 06:54:42 bastafidli Exp $

Author:

Julian Legeny

Code reviewer:

Miro Halas

Code reviewed:

1.1 2006/07/26 23:44:50 jlegeny

Field Summary

Fields inherited from class org.opensubsystems.core.persist.db.DatabaseOperation

m_data, m_dbschema, m_factory, m_iDataType, m_returnData, m_strQuery

Fields inherited from interface org.opensubsystems.core.persist.db.DatabaseOperations

DBOP_DELETE, DBOP_INSERT, DBOP_SELECT, DBOP_UPDATE

Constructor Summary

DatabaseUpdateSingleDataObjectOperation(DatabaseFactoryImpl factory, java.lang.String strQueryToPrepare, ModifiableDatabaseSchema schema, java.lang.Object data)
Constructor to use when database update doesn't require any prepared statement.

Method Summary

protected void

performOperation(DatabaseFactoryImpl dbfactory, java.sql.Connection cntConnection, java.sql.PreparedStatement pstmQuery) Define content of this method to perform the database operation using the provided connection and optional prepared statement.

Methods inherited from class org.opensubsystems.core.persist.db.DatabaseUpdateOperation

executeUpdate, handleKnownError, handleSQLException, handleUnknownError, prepareData, setValuesForInsert, setValuesForUpdate

Methods inherited from class org.opensubsystems.core.persist.db.DatabaseOperation

getReturnData, setReturnData

Methods inherited from class java.lang.Object

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

Constructor Detail

DatabaseUpdateSingleDataObjectOperation

public DatabaseUpdateSingleDataObjectOperation(DatabaseFactoryImpl factory,
                                               java.lang.String strQueryToPrepare,
                                               ModifiableDatabaseSchema schema,
                                               java.lang.Object data)

Constructor to use when database update doesn't require any prepared statement.

Parameters:

factory - - factory which is executing this operation

strQueryToPrepare - - query which should be used to construct prepared statement which will be passed in to executeUpdate

schema - - database schema used with this operation

data - - data used for operation

Method Detail

performOperation

protected void performOperation(DatabaseFactoryImpl dbfactory,
                                java.sql.Connection cntConnection,
                                java.sql.PreparedStatement pstmQuery)
                         throws OSSException,
                                java.sql.SQLException

Define content of this method to perform the database operation using the provided connection and optional prepared statement.

Overrides:

performOperation in class DatabaseUpdateOperation

Parameters:

dbfactory - - database factory used for this operation

cntConnection - - ready to use connection to perform the database operation. No need to return this connection.

pstmQuery - - prepared statement for query passed in as a parameter to the constructor. No need to close this statement. If no query was passed into constructor, this will be null.

Throws:

OSSException - - an error has occured

java.sql.SQLException - - an error has occured