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EclipseLink/UserGuide/SDO/Using EclipseLink SDO (ELUG)
This section explains where and how you use EclipseLink SDO to customize your application to meet requirements.
Contents
Performing Actions on Data Objects at Run Time
Use the following classes to perform actions on your data objects:
For more information, see EclipseLink SDO examples.
Using HelperContext
SDO defines a HelperContext interface. You use it to access related SDO helper classes that let you perform common operations such as reading and writing XML documents, defining SDO types from XML Schema, and so on.
To obtain a default context, call the HelperProvider getDefaultContext method.
You can create the local context provided by EclipseLink as follows:
HelperContext helperContext = new SDOHelperContext();
For more information, see the following:
- EclipseLink SDOHelperContext API
- EclipseLink HelperContext examples
What You May Need to Know About Local and Global HelperContext
All the helpers that you can retrieve using accessor methods or instance fields of the global HelperContext have visibility to the global SDO metadata, that is, their scope of execution is global.
The opposite is true for the local HelperContext, such as the SDOHelperContext provided by EclipseLink: you can use it to obtain helpers that have visibility to the local SDO metadata.
Using the EclipseLink SDOHelperContext makeDefaultContext method, you can promote your local context to become the global (default) one.
Using DataFactory
You use the DataFactory to create disconnected instances of a DataObject. That is, the newly created DataObject instances have no set properties and no container.
You can obtain the DataFactory from the HelperContext, and vice versa.
For more information, see the following:
- EclipseLink SDODataFactory API
- EclipseLink DataFactory examples
Using XMLHelper
Information pending
Using DataHelper
Information pending
Using CopyHelper
Information pending
Using EqualityHelper
Information pending
Generating Static SDO Classes at Design Time
Information pending
Performing Integration
Information pending
Integrating SDO with JAXB
Information pending
Integrating SDO with JPA
Information pending
Using SDO as a Web Service Binding Layer
Information pending
How to Use Web Service Attachments
Information pending
Executing XPath with XML
Information pending