Bug 149251 Inconsistent Handling of a Non-inheritable ROM Property
For a ROM property defined to be non-inheritable, an empty string property value should be consistently handled as an empty string, not as null. For example, an oda.dataSource extension defines a data source property with canInherit=false. When a oda-data-source handle get saved in a report design, it correctly includes the tag for such property, even when an empty string value is specified. <oda-data-source extensionID="my.oda.plugin" name="my Data Source" id="24"> ... <property name="ApplicationServer"></property> </oda-data-source> However, later when using the DE API to read its property value, a null is returned. Then when the report design is subsequently saved, the property tag is lost. Expects that an empty string value of a non-inhertiable property should be preserved.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/metadata/ElementDefn.java
if ( hasStyle( ) )
		{
			ElementDefn styleDefn = (ElementDefn) dd
					.getElement( ReportDesignConstants.STYLE_ELEMENT );
			
			
			if ( styleDefn == null )
			{
				throw new MetaDataException( new String[]{this.name},
						MetaDataException.DESIGN_EXCEPTION_STYLE_NOT_DEFINED );
			}
			if ( styleDefn.properties.containsKey( property.getName( ) ) )
			{
				throw new MetaDataException( new String[]{property.getName( ),
						this.name},
						MetaDataException.DESIGN_EXCEPTION_DUPLICATE_PROPERTY );
			}
		}
		super.addProperty( property );
	}
	/**
	 * Returns the semantic validation trigger definition collection.
	 * 
	 * @return the semantic validation trigger definition collection
	 */
	public SemanticTriggerDefnSet getTriggerDefnSet( )
	{
		if ( triggerDefnSet == null )
			triggerDefnSet = new SemanticTriggerDefnSet( );
		return triggerDefnSet;