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
assert !isBuilt;
		javaClass = theClass;
	}
	/**
	 * Sets the name of the style which "selects" this element.
	 * 
	 * @param value
	 *            The predefined style name.
	 */
	void setSelector( String value )
	{
		selector = value;
	}
	/**
	 * Sets the "extends" attribute.
	 * 
	 * @param base
	 *            The name of the element type which this element extends.
	 */
	void setExtends( String base )
	{
		assert !isBuilt;
		extendsFrom = base;
	}
	/**
	 * Sets the "supports user properties" attribute.
	 * 
	 * @param flag
	 *            True if the element allows user-defined properties, false
	 *            otherwise.