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
*/
	void setSupportsUserProperties( boolean flag )
	{
		assert !isBuilt;
		supportsUserProperties = flag;
	}
	/**
	 * Gets the name of the parent element, if any. The parent element is the
	 * one that this element extends.
	 * 
	 * @return The name of the base element, if any.
	 */
	public String getExtends( )
	{
		return extendsFrom;
	}
	/**
	 * Gets the java class of this element.
	 * 
	 * @return The java class of this element.
	 */
	public String getJavaClass( )
	{
		return javaClass;
	}
	/**
	 * Indicates if this element has a style.
	 * 
	 * @return Returns whether the element has a style.
	 */