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Dali JPA Tools

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

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Dali JPA Tools

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  1. Dali JPA Tools

  2. 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

  3. Dali Goals • Simplicity • Automated mapping wizards and intelligent mappingassistance • Intuitiveness • Use existing and consistent modelling and tooling practices inEclipse • Compliance • Support any and all Java Persistence API compliant runtimeimplementations • Test using EJB 3.0 JPA Reference Implementation • Extensibility • Provide extension points for vendors and open source projectsto add their own value-add features

  4. 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/dali_jsf_tutorial.pdf • Dali Developer Documentation http://wiki.eclipse.org/index.php/Dali_Developer_Documentation

  5. JPA Development Perspective • To start using Dali JPA Tools in Eclipse open “JPA Development” perspective

  6. 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

  7. Database Connection • Create database connection using a “Data Source Explorer” view

  8. JPA Details View • The JPA Details view displays the persistence information for the currently selected entity

  9. JPA Structure View • The JPA Structure view displays an outline of the structure (its attributes andmappings) of the entity that is currently selected or opened in the editor

  10. 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

  11. 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

  12. Table Generation from Entities • Generates platform specific tables from Entities through the DDL generation • Right-click the JPA project  JPA Tools  Generate DDL

  13. 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

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