Later on, the customer's data is updated. Once a new customer signs in, a new Customer object is created. ForĮach field, there are getter and setter methods. There is a Customer class with fields like name, email address, etc. Our example application needs to store data about a customer. Of the class needs getter and setter methods. Is created with all the information about the persistent fields. The application, each one of these classes is initialized and an ObjectMapping With persistent data have to extend StorableObject. To use the DB Objects package, all classes of the application Stores or retrieves objects, the object mapping is called up to get allįor a better understanding of the architecture please look atĬonsider an application that needs a storage mechanism for the data of This object mapping defines all fields of the class that should be storedĪnd their corresponding database table and columns. It uses connection pooling for high performance access to the database,Įxecutes pre-generated statements, and creates new objects after they areĮach class whose objects have to be made persistent has to extend theĪbstract class StorableObject and needs to be initialized.ĭuring the initialization, an ObjectMapping object is created andĪll information needed about the class is set by the DBManager. One class, the DBManager, is responsible for all access to the database. The drawback is that specialĭatabase features are hard to support from a user's point of view. Generically without any user-specific code. The advantage is that storing and retrieving data can be done The approach taken in this package is to view a database only as a storage This project is hosted by Technical Summary Future development on his project will be more Please note that there is a new project available that builds on the ideasĭeveloped by Gareth Reeves. New version 0.34 (July 25, 2001): After almost a year with little That are included in the current version. Have a look atįor his class DBConnectionBroker that he allowed me to include into DB Objects If you have any comments and suggestionsĭB Objects is under the LGPL.
Free relational database for java application code#
Midium-sized application with access to a database, with or without a web-tier,Īlthough the code has matured by now, it is still work in progress. Not an alternative to a full-featured application server because of It is intended forĭevelopers who don't want to cope with SQL statements in their code. Retrieving java objects in and from relational databases. This package provides a lightweight and flexible solution for storing and cvs directory (hosted by Giant Java Tree).