Creating JDO Persistent Objects

The following sections describe how to create JDO Persistent Objects with PowerDesigner.

• Defining Java Classes
  You define Java Classes as follows:
• Defining O/R Mapping
  You define O/R Mapping as follows:
• Defining Classes and Database Schema
  If you have an existing database, you can reverse engineer the database and create a PDM, then generate an Object-Oriented Model (OOM) from the PDM. PowerDesigner will generate the default O/R mapping.
• Defining O/R Mapping
  When you generate an OOM from a PDM or a PDM from an OOM, the default O/R mapping can be generated and saved in the OOM. You can also manually define complex O/R mapping.
• Customizing O/R Mapping
  If necessary, you can customize the O/R mapping.
• Adding JDO Support
  PowerDesigner uses a JDO profile (Extended Model Definition) to generate JDO files.
• Defining Standard JDO Persistence Descriptors
  To customize the generated JDO persistence descriptor and O/R mapping extensions, PowerDesigner uses extended attributes for classes, attributes and associations.
• Defining JDO Persistence Descriptor for Xcalia LiDO
  Xcalia LiDO is a JDO product. It fully implements the JDO 1.0 standard. It also provides complete O/R mapping extensions.

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Created October 7, 2009. Send feedback on this help topic to Sybase Technical Publications: pubs@sybase.com