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Dali JPA Tools About Dali • Dali JPA Tools is an Eclipse Web Tools Platform sub-Project • Dali 1.0 is a part of WTP 2.0 Europa coordinated release • Goal - to build extensible frameworks and exemplary tools for the definition and editing of object-relational mappings for JPA Entities • Provide creation and automated initial mapping wizards, programming assistance such as dynamic problem identification Dali Goals • Simplicity • • Intuitiveness • • Use existing and consistent modelling and tooling practices in Eclipse Compliance • • • Automated mapping wizards and intelligent mapping assistance Support any and all Java Persistence API compliant runtime implementations Test using EJB 3.0 JPA Reference Implementation Extensibility • Provide extension points for vendors and open source projects to add their own value-add features Information • Dali Web Site: http://www.eclipse.org/webtools/dali/main.php • Dali User’s Guide: http://www.eclipse.org/webtools/dali/docs/dali_user_guide. pdf • Dali Tutorial: http://www.eclipse.org/webtools/dali/docs/tutorial_1.0/dal i_jsf_tutorial.pdf • Dali Developer Documentation http://wiki.eclipse.org/index.php/Dali_Developer_Documenta tion JPA Development Perspective • To start using Dali JPA Tools in Eclipse open “JPA Development” perspective Basic Steps • • • • • Create a database connection Create a JPA project Create persistent Java entities Associate the entity with a database table Create OR mapping • id • columns • relationships Database Connection • Create database connection using a “Data Source Explorer” view JPA Details View • The JPA Details view displays the persistence information for the currently selected entity JPA Structure View • The JPA Structure view displays an outline of the structure (its attributes and mappings) of the entity that is currently selected or opened in the editor Managing the persistence.xml file • When creating a JPA project, you can also create the persistence.xml file • Use the Persistence XML Editor to edit the persistence.xml file • Synchronizing classes • as you work with the classes in your Java project, you will need to update the persistence.xml file to reflect the changes • right-click the persistence.xml file JPA Tools Synchronize Classes Generating Entities from Tables • Procedure to generate Java persistent entities from database tables • Right-click the JPA project JPA Tools Generate Entities • Eclipse creates a Java persistent entity for each database table • Each entity contains fields based on the table’s columns • Eclipse will also generate entity relationships based on the table constrain Table Generation from Entities • Generates platform specific tables from Entities through the DDL generation • Right-click the JPA project JPA Tools Generate DDL Demos • On the project web site it’s possible to view visual Demos for: • • • • • Creating a Database Connection Creating a Database Schema Creating a JPA Project Mapping with Annotations Mapping with XML