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/DesignElement.java
}
	/**
	 * Determines if the current element can be transformed to a template
	 * element. False will be returned if the element can not be dropped or the
	 * container of the current element can not contain the template element.
	 * 
	 * @param module
	 *            the root module of the element
	 * 
	 * @return true if it can be transformed, otherwise false.
	 */
	public boolean canTransformToTemplate( Module module )
	{
		if ( this instanceof TemplateElement || ( !canDrop( ) ) )
			return false;
		IElementDefn templateReportItem = MetaDataDictionary.getInstance( )
				.getElement( ReportDesignConstants.TEMPLATE_REPORT_ITEM );
		IElementDefn templateDataSet = MetaDataDictionary.getInstance( )
				.getElement( ReportDesignConstants.TEMPLATE_DATA_SET );
		if ( getContainer( ) != null )
			return getContainer( ).canContain( module, getContainerSlot( ),
					templateReportItem )
					|| getContainer( ).canContain( module, getContainerSlot( ),
							templateDataSet );
		return true;
	}
	/**
	 * Checks whether this element is based on a template parameter definition
	 * or not.
	 *