Java Open Source Projects Directory

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Persistence Frameworks

o-r-broker

O/R Broker is a convenience framework for applications that use JDBC. It allows you to externalize your SQL statements into individual files, for readability and easy manipulation, and it allows declarative mapping from tables to objects. Not just JavaBeans objects, but any arbitrary POJO. This is the strength of O/R Broker compared to other similar persistence tools. It allows the developer to design proper object-oriented classes for persistence, without having to be forced to use JavaBeans only, and it has full support for inheritance hierarchies and circular references. One of the design goal for O/R Broker was simplicity, which means that there are only 4 public classes, and an XML Schema file for validation of the very simple XML configuration file. In short, O/R Broker is a JDBC framework that does not dictate domain class design, whether that be having to conform to the JavaBeans spec, having to extend a superclass or implement an interface, but allows persistence independence and proper object-oriented class design.

 

super-csv

Super CSV is a CSV package for processing CSV files. Super CSV is designed around solid Object-oriented principles, and thus aims to leverage your Object-oriented code, making it easier to write and maintain. Super CSV offers the following features:

 * The ability to read/write POJO beans, Maps and String lists.
 * The ability to easily convert input/output to integers, dates, trimming strings, etc...
 * The ability to easily verify data conforms to some specification, such as number ranges, string sizes, uniqueness and even optional columns.
 * The ability to read/write data from anywhere in any encoding. As long as you provide a Reader or a Writer.
 * Support for Windows, MAC and Linux line breaks.
 * Configurable separation character, space character end end of line character (for writing files)
 * Correctly handling of characters such as " and ,
 * Operates on streams rather than filenames, enabling you to read/write CSV files e.g. over a network connection

 

odal

ODAL is database persistence framework with emphasis on maintainability and performance. Features include query API, ORM, data validation/conversion, stored procedure support, code generation. Minimal dependencies. Short startup time.

 

persist

Persist is a minimalist Java ORM/DAO library designed for high performance and ease of use. Unlike most ORM tools, Persist does not aim to completely isolate application code from relational databases. Instead, it intends to minimize the effort to handle data stored in a RDBMS through JDBC, without making compromises on performance and flexibility.

 

ammentos

A lightweight persistence framework for Java (JDK5.0 or later). Extremely simple to use, works whith annotations, does not require any configuration/mapping file, runs whith any JDBC compliant database (no SQL dialects to configure) and supports multi-device persistence.

 

jaxor

Jaxor is a code-generating OR mapping tool which takes information defined in XML relating to the relational entities to be mapped and generates classes, interfaces and finder objects which can be used from any Java application (including JFC/Swing, J2EE and command-line tools). The actual code generation is handled by Velocity templates rather than by fixed mechanisms within the tool. This flexability allows easy tailoring and modification to the formatting or even the code that gets generated.

 

pat

PAT stands for "Persistent Applications Toolkit". Like many other software it simplifies developing of persistence layers of business applications. It does it by providing object-oriented environment for persistence of your objects: POJOs And.. it really does it. PAT provides almost transparent data layer for a business application. It employs state-of-the-art techniques to achieve it. These are OO, AOP (JBossAOP), Java, Prevayler, Ant, JUnit, Log4j, @@annotations and others. It cooperates well with web applications: Struts (and possibly other web frameworks), Tomcat, JBoss AS. (AOP term: persistence aspect)

 

jgrinder

JGrinder is a framework for mapping Objects in Java to various persistent stores. These include relational databases, in memory 'storage', and flat files. The architecture allows additional persistent stores to be supported (such as storing objects over a messaging middleware).

 


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