Changeset 15655 for gsdl/trunk/lib/dbclass.h

Timestamp:

2008-05-22T16:44:51+12:00 (16 years ago)

Author:

mdewsnip

Message:

(Adding new DB support) Created default implementations of getinfo() and setinfo() in dbclass so they don't necessarily be re-implemented for every subclass.

File:

• gsdl/trunk/lib/dbclass.h (modified) (2 diffs)

gsdl/trunk/lib/dbclass.h

@@ -54 +54 @@
   virtual ~dbclass();
 
-  // MUST be implemented by subclasses; returns true if opened
+  void setlogout (ostream *logout_arg) { logout = logout_arg; }
+
+
+  // -----------------------------------------------------------------------------------------------
+  // These functions MUST be implemented by subclasses, as they are database-specific
+
+  // returns true if opened
   virtual bool opendatabase (const text_t &filename, int mode, int num_retrys, bool need_filelock) = 0;
 
-  // MUST be implemented by subclasses
   virtual void closedatabase () = 0;
 
-  // MUST be implemented by subclasses
   virtual void deletekey (const text_t &key) = 0;
 
-  // May be overwritten by subclasses; returns true if exists
-  virtual bool exists (const text_t& key);
-
-  // Must be implemented by subclasses; returns true on success
-  virtual bool getinfo (const text_t& key, infodbclass &info) = 0;
-
-  // MUST be implemented by subclasses; returns true on success
+  // returns true on success
   virtual bool getkeydata (const text_t& key, text_t &data) = 0;
 
-  // MUST be implemented by subclasses; returns array of keys
+  // returns array of keys
   virtual text_tarray getkeys () = 0;
 
-  // Must be implemented by subclasses; returns true on success
-  virtual bool setinfo (const text_t &key, const infodbclass &info) = 0;
-
-  // MUST be implemented by subclasses; returns true on success
+  // returns true on success
   virtual bool setkeydata (const text_t &key, const text_t &data) = 0;
 
 
-  void setlogout (ostream *logout_arg) { logout = logout_arg; }
+  // -----------------------------------------------------------------------------------------------
+  // These functions may be overwritten by subclasses, but a default implementation is provided
+
+  // returns true if exists
+  virtual bool exists (const text_t& key);
+
+  // returns true on success
+  virtual bool getinfo (const text_t& key, infodbclass &info);
+
+  // returns true on success
+  virtual bool setinfo (const text_t &key, const infodbclass &info);
+
 
   // replaces the .c, .p, .n, .l syntax (child, parent, next, previous) 
@@ -92 +98 @@
   ostream *logout;
 
+  // returns true on success
+  bool getinfoline (text_t::iterator &here, text_t::iterator end, text_t &key, text_t &value);
+
   void get_first_child (text_t &OID, infodbclass &info);
   void get_last_child (text_t &OID, infodbclass &info);