Configuring a Relational Direct-to-XMLType Mapping (ELUG)

Related Topics

For information on how to create EclipseLink mappings, see Creating a Mapping.

This table lists the configurable options for a relational direct-to-XMLType mapping.

Option to Configure	Workbench	Java
Database field
Method or direct field access
Read-only
Configuring Read Whole Document
Mapping comments

This example shows how to create a direct-to-XMLType mapping and add it to a descriptor using Java code.

Direct-to-XMLType Mapping

public void customize(ClassDescriptor descriptor) { 
   DirectToXMLTypeMapping mapping = new DirectToXMLTypeMapping();  

   // configure mapping
   mapping.setAttributeName("document");

   // add mapping to descriptor
   descriptor.addMapping(mapping);
}

For more information, see the following:

• Direct-to-XMLType Mapping
• Configuring a Relational Mapping
• Configuring a Mapping.

Configuring Read Whole Document

When mapping an XML Type to a Document Object Model (DOM), by default EclipseLink uses the database representation of the DOM. This allows for lazy loading of the XML data from the database.

However, if you require the entire DOM, (or if you require the DOM to be available in a disconnected fashion from the database connection) use the Read Whole option to retrieve the entire DOM from the database.

How to Configure Read Whole Document Using Workbench

To specify that this mapping reads the whole XML document, use this procedure:

1. Select the mapping in the Navigator. Its properties appear in the Editor.
2. Click General. The General tab appears.
   Direct to XML Mapping Property Sheet, Read Whole Document Option
   
3. Choose the Read Whole Document option to read the whole XML document. If you do not select this option, the connection must remain open for EclipseLink to read the database values.

How to Configure Read Whole Document Using Java

Use the following DirectToXMLTypeMapping methods:

• setShouldReadWholeDocument
• shouldReadWholeDocument

For more information about the available methods for DirectToXMLTypeMapping, see the EclipseLink API Reference.

---

Copyright Statement