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/command/PropertyCommand.java
assert ref != null;
		ElementPropertyDefn propDefn = ref.getPropDefn( );
		if ( ref.getPropDefn( ).isList( ) )
		{
			
			ArrayList list = (ArrayList) element.getLocalProperty( module,
					propDefn );
			if ( list != null )
				return;
			
			ArrayList inherited = (ArrayList) element.getProperty( module,
					propDefn );
			list = new ArrayList( );
			if ( inherited != null )
			{
				for ( int i = 0; i < inherited.size( ); i++ )
					list.add( ( (IStructure) inherited.get( i ) ).copy( ) );
			}
			
			PropertyRecord propRecord = new PropertyRecord( element, propDefn,
					list );
			getActivityStack( ).execute( propRecord );
			return;
		}
		
		Structure struct = (Structure) element.getLocalProperty( module,
				propDefn );
		if ( struct != null )
			return;