Status

olap4j 1.0.0 was released on April 12, 2011.

This olap4j release includes the specification, a technology compatibility kit (TCK) and a generic XML/A driver compatible with Pentaho Analysis (Mondrian), Microsoft SQL Server Analysis Services, Palo and SAP BW.

Read the press release.

Resources

• olap4j project at SourceForge.
• Download 1.0.0 release and specification (PDF or HTML).
• API javadoc.
• Primer and code examples.
• For project committers: latest API and specification (HTML only).

Modules

Olap4j is distributed as four Java JAR libraries.

• olap4j
  Core API, Query Model, Transformation and other auxiliary packages, along with the driver specification.


• olap4j-xmla
  Driver implementation of olap4j for XML/A data sources. It is compatible with Mondrian, Palo, SAP BW and SQL Server 2005+.


• olap4j-tck
  Technology compatibility kit. Consists mostly of JUnit tests.


• olap4j-jdk14
  Olap4j distribution compatible with Java 1.4. Includes the core API and the XML/A driver.

Packages and Roadmap

The core API of olap4j version 1.0 is a Long Term Support (LTS) release, but some parts of the olap4j project will remain considered as experimental, thus subject to change in future releases.

Core packages

The core packages in olap4j-1.0 are as follows.

• org.olap4j.driver.xmla
  Generic XML/A driver.


• org.olap4j.mdx
  Core objects of the MDX model.


• org.olap4j.mdx.parser
  Parser for the MDX query language.


• org.olap4j.metadata
  Discovery of OLAP servers metadata.


• org.olap4j.type
  System for the core MDX object model and the metadata package.

Experimental packages

The following packages are considered experimental and are subject to change.

• org.olap4j.query
  Programmatic Query Model.


• org.olap4j.transform
  Core MDX object model transformation utilities.


• org.olap4j.layout
  Utility classes to display CellSets.


• org.olap4j.CellSetListener and all associated classes
  Event-based system for real time updates of CellSet objects.


• org.olap4j.Scenario and all associated classes
  Statistical simulations module.

Get involved!

Join the forum, download the specification, and give us your feedback. If you are developing an OLAP server, component or application, let's work together to make your project olap4j-compliant.

There are olap4j drivers for mondrian and XML/A; we are looking for committers to port the XML/A driver to new servers, and to write native drivers for other OLAP engines.