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/elements/strategy/CellPropSearchStrategy.java
(Cell) cell, prop );
			e = e.getContainer( );
		}
		return super.getPropertyRelatedToContainer( module, cell, prop );
	}
	/**
	 * Gets a property value on the container column with the given definition.
	 * If <code>prop</code> is a style property definition, also check style
	 * values defined on the Table/Grid columns.
	 * 
	 * @param module
	 *            the module
	 * @param container
	 *            the container, must be Table or Grid
	 * @param cell
	 *            the cell on which the property value to find
	 * @param prop
	 *            the property definition
	 * @return the property value
	 */
	public Object getColumnProperty( Module module, DesignElement container,
			Cell cell, ElementPropertyDefn prop )
	{
		Object value = null;
		if ( container instanceof TableItem )
		{
			TableItem table = (TableItem) container;
			value = getPropertyFromColumn( module, table, cell, prop );
		}
		if ( container instanceof GridItem )