Book Image

Liferay Portal Systems Development

Book Image

Liferay Portal Systems Development

Overview of this book

Liferay portal is one of the most mature portal frameworks in the market, offering many key business benefits that involve personalization, customization, content management systems, web content management, collaboration, social networking and workflow. If you are a Java developer who wants to build custom web sites and WAP sites using Liferay portal, this book is all you need. Liferay Portal Systems Development shows Java developers how to use Liferay kernel 6.1 and above as a framework to develop custom web and WAP systems which will help you to maximize your productivity gains. Get ready for a rich, friendly, intuitive, and collaborative end-user experience! The clear, practical examples in the sample application that runs throughout this book will enable professional Java developers to build custom web sites, portals, and mobile applications using Liferay portal as a framework. You will learn how to make all of your organization's data and web content easily accessible by customizing Liferay into a single point of access. The book will also show you how to improve your inter-company communication by enhancing your web and WAP sites to easily share content with colleagues.
Table of Contents (17 chapters)
Liferay Portal Systems Development
Credits
About the Author
Acknowledgement
About the Reviewers
www.PacktPub.com
Preface

Expando custom attribute


The portal provides a feature called custom attribute (or called custom field), which allows extending the profile of users and organizations, with fields, to store custom information. In fact, it allows extending any core entities, such as, Document Library folders and documents, web content, wiki pages, blogs entries, bookmarks entries, calendar events, users, and organizations, and custom entities such as Knowledge Base articles. The Custom attribute is safely stored within the database and is fully indexed.

Models and services

As shown in the following figure, a custom attribute is defined by four entities: ExpandoTable, ExpandoColumn, ExpandoRow, and ExpandoValue. As you can see, the entity ExpandoTable can have many entities, such as, ExpandoColumn, ExpandoRow, and ExpandoValue. In other words, each ExpandoColumn, ExpandoRow, and ExpandoValue will have an ExpandoTable associated with it. And especially, each ExpandoValue will have ExpandoColumn, ExpandoRow...