Changeset 179 for Doc/Backend/DBInterface.tex

Timestamp:

12/09/11 10:39:10 (13 years ago)

Author:

jkraaijeveld

Message:

Updated documentation and PHPDoc

File:

• Doc/Backend/DBInterface.tex (modified) (1 diff)

Doc/Backend/DBInterface.tex

@@ -207 +207 @@
 
 \section{Future Work}\label{futurework}
-        //TODO
+        \subsection{Adhere to Open-Closed Principle}
+                At the moment, \textit{the DatabaseInterface.php} class violates the Open-Closed principle. Every new connector,
+                four lines need to be added in this class. This is unwanted if new RDF datatypes are added. The same holds for
+                the method createArguments in this class: extra cases have to be added if more types of arguments become possible.
+                Adhering to the Open-Closed principle will allow for easier extention and maintenance of the database-related classes.
+
+        \subsection{Deal with invalid or missing values}
+                This goes in two parts. Firstly, the database now assumes that given an entry, all the fields for its type are there and
+                filled in. This is unwanted since it can cause issues with backwards compatability of certain .rdf files. Secondly, it
+                assumes that fields containing a UID to a different entry actually point to a valid entry. For instance, a Survey query will
+                try to get a User object as its creator value from the database as well, assuming it exists. It will break if this user object
+                does not exist.
 
 \appendix