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/core/ReferencableStructure.java
*      org.eclipse.birt.report.model.metadata.PropertyDefn)
	 */
	public Object getLocalProperty( Module module, PropertyDefn propDefn )
	{
		
		if ( libReference != null && !libReference.isResolved( ) )
		{
			PropertyDefn libRefDefn = (PropertyDefn) getDefn( ).getMember(
					LIB_REFERENCE_MEMBER );
			assert libRefDefn != null;
			StructRefPropertyType type = (StructRefPropertyType) libRefDefn
					.getType( );
			type.resolve( module, libRefDefn, libReference );
			if ( libReference.isResolved( ) )
				libReference.getTargetStructure( ).addClientStructure( this );
		}
		return super.getLocalProperty( module, propDefn );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.core.Structure#setIntrinsicProperty(java.lang.String,
	 *      java.lang.Object)
	 */
	protected void setIntrinsicProperty( String propName, Object value )
	{
		if ( LIB_REFERENCE_MEMBER.equalsIgnoreCase( propName ) )
		{
			updateReference( libReference, (StructRefValue) value );
			libReference = (StructRefValue) value;