Difference between revisions of "EclipseLink/UserGuide/SDO/Introduction to EclipseLink SDO (ELUG)"
m (→What You May Need to Know About Sequence, ChangeSummary, and DataGraph)
|Line 55:||Line 55:|
Revision as of 08:48, 23 April 2009
This section introduces EclipseLink implementation of Service Data Objects (SDO) specification, as well as provides information on how you can use it in your application development.
- 1 Using SDO Metadata
- 2 Using Data
Using SDO Metadata
SDO Type acts similarly to a Class in Java, and provides much of the same metadata as the Java Reflection API provides for Java classes.
In EclipseLink, a Type wraps an object-XML mapping (OXM) descriptor.
Types can have supertypes, which corresponds to the EclipseLink concept of an inheritance policy (see ...).
What You May Need to Know About Open Sequenced Type
What You May Need to Know About DataObject Types for Data Types
SDO property acts similarly to a property in Java and provides much of the same metadata as the Java Reflection API provides for Java fields or methods.
In EclipseLink, a Property wraps an object-XML mapping in the following way: