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/api/ModuleHandle.java
}
	/**
	 * Returns the structures which are defined in report design and all
	 * included valid libraries. This method will filter the structure with
	 * duplicate name with the follow rule.
	 * 
	 * <ul>
	 * <li>The structure defined in design file overrides the one with the same
	 * name in library file.
	 * <li>The structure defined in preceding library overrides the one with
	 * the same name in following library file.
	 * <ul>
	 * 
	 * @param propName
	 *            name of the list property
	 * @param nameMember
	 *            name of the name member
	 * @return the filtered structure list with the above rule.
	 */
	List getFilteredStructureList( String propName, String nameMember )
	{
		List list = new ArrayList( );
		PropertyHandle propHandle = getPropertyHandle( propName );
		assert propHandle != null;
		Set names = new HashSet( );
		Iterator iter = propHandle.iterator( );
		while ( iter.hasNext( ) )
		{
			StructureHandle s = (StructureHandle) iter.next( );
			String nameValue = (String) s.getProperty( nameMember );