1 files changed, 89 insertions, 0 deletions
diff --git a/portato/db/database.py b/portato/db/database.py
new file mode 100644
index 0000000..941c3a3
--- /dev/null
+++ b/portato/db/database.py
@@ -0,0 +1,89 @@
+# -*- coding: utf-8 -*-
+#
+# File: portato/db/database.py
+# This file is part of the Portato-Project, a graphical portage-frontend.
+#
+# Copyright (C) 2009 René 'Necoro' Neumann
+# This is free software.  You may redistribute copies of it under the terms of
+# the GNU General Public License version 2.
+# There is NO WARRANTY, to the extent permitted by law.
+#
+# Written by René 'Necoro' Neumann <necoro@necoro.net>
+
+from __future__ import absolute_import, with_statement
+
+from threading import RLock
+from functools import wraps
+
+class PkgData (object):
+    __slots__ = ("cat", "pkg", "inst")
+
+    def __init__ (self, cat, pkg, inst):
+        self.cat = cat
+        self.pkg = pkg
+        self.inst = inst
+
+    def __iter__ (self):
+        return iter((self.cat, self.pkg, self.inst))
+
+    def __cmp__ (self, other):
+        return cmp(self.pkg.lower(), other.pkg.lower())
+
+    def __repr__ (self):
+        return "<Package (%(cat)s, %(pkg)s, %(inst)s)>" % {"cat" : self.cat, "pkg" : self.pkg, "inst" : self.inst}
+
+class Database (object):
+
+    ALL = _("ALL")
+
+    def __init__ (self):
+        self._lock = RLock()
+
+    @staticmethod
+    def lock (f):
+        @wraps(f)
+        def wrapper (self, *args, **kwargs):
+            with self._lock:
+                r = f(self, *args, **kwargs)
+                
+            return r
+        
+        return wrapper
+
+    def populate (self, category = None):
+        """Populates the database.
+        
+        @param category: An optional category - so only packages of this category are inserted.
+        @type category: string
+        """
+        raise NotImplentedError
+
+    def get_cat (self, cat = None, byName = True):
+        """Returns the packages in the category.
+        
+        @param cat: category to return the packages from; if None it defaults to C{ALL}
+        @type cat: string
+        @param byName: selects whether to return the list sorted by name or by installation
+        @type byName: boolean
+        @return: an iterator over the packages
+        @rtype: L{PkgData}<iterator>
+        """
+        raise NotImplentedError
+
+    def get_categories (self, installed = False):
+        """Returns all categories.
+        
+        @param installed: Only return these with at least one installed package.
+        @type installed: boolean
+        @returns: the list of categories
+        @rtype: string<iterator>
+        """
+        raise NotImplentedError
+
+    def reload (self, cat = None):
+        """Reloads the given category.
+        
+        @param cat: category
+        @type cat: string
+        """
+        raise NotImplentedError