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/ElementRefPropertyType.java
}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.design.metadata.PropertyType#getTypeCode()
	 */
	public int getTypeCode( )
	{
		return ELEMENT_REF_TYPE;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.design.metadata.PropertyType#getXmlName()
	 */
	public String getName( )
	{
		return ELEMENT_REF_NAME;
	}
	/**
	 * Validates an element reference value and returns a corresponding
	 * <code>ElementRefValue</code> that reference the target element. The
	 * target element to be referenced can be identified by its name or the
	 * element instance.
	 * 
	 * @return the corresponding <code>ElementRefValue</code>, it will be
	 *         resolved if the target element is found in the namespace. Return
	 *         <code>null</code> if value is null.
	 * @throws PropertyValueException
	 *             if the target element is of different meta definition as the