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/Module.java
isValid = false;
		if ( !isReadOnly( ) )
		{
			saveState = activityStack.getCurrentTransNo( );
			session.drop( this );
		}
	}
	/**
	 * This method is not supported in report design.
	 * 
	 * @return Object the cloned report design element.
	 * 
	 * @see java.lang.Object#clone()
	 */
	public Object doClone( CopyPolicy policy )
			throws CloneNotSupportedException
	{
		Module module = (Module) super.doClone( policy );
		
		module.activityStack = new ActivityStack( );
		module.allExceptions = null;
		module.attributeListeners = null;
		module.disposeListeners = null;
		module.elementIDCounter = 1;
		module.fatalException = null;
		module.idMap = new HashMap( );
		module.moduleNameSpaces = new IModuleNameSpace[NAME_SPACE_COUNT];
		module.nameSpaces = new NameSpace[NAME_SPACE_COUNT];
		module.nameManager = new NameManager( module );
		module.referencableProperties = null;