Merge from trunk

[plcapi.git] / trunk / PLC / NetworkTypes.py

diff --git a/trunk/PLC/NetworkTypes.py b/trunk/PLC/NetworkTypes.py
new file mode 100644 (file)
index 0000000..f3a032f
--- /dev/null
+++ b/trunk/PLC/NetworkTypes.py
@@ -0,0 +1,53 @@
+#
+# Functions for interacting with the network_types table in the database
+#
+# Mark Huang <mlhuang@cs.princeton.edu>
+# Copyright (C) 2006 The Trustees of Princeton University
+#
+# $Id$
+#
+
+from PLC.Faults import *
+from PLC.Parameter import Parameter
+from PLC.Table import Row, Table
+
+class NetworkType(Row):
+    """
+    Representation of a row in the network_types table. To use,
+    instantiate with a dict of values.
+    """
+
+    table_name = 'network_types'
+    primary_key = 'type'
+    join_tables = ['nodenetworks']
+    fields = {
+        'type': Parameter(str, "Network type", max = 20),
+        }
+
+    def validate_type(self, name):
+       # Make sure name is not blank
+        if not len(name):
+            raise PLCInvalidArgument, "Network type must be specified"
+       
+       # Make sure network type does not alredy exist
+       conflicts = NetworkTypes(self.api, [name])
+        if conflicts:
+            raise PLCInvalidArgument, "Network type name already in use"
+
+       return name
+
+class NetworkTypes(Table):
+    """
+    Representation of the network_types table in the database.
+    """
+
+    def __init__(self, api, types = None):
+        Table.__init__(self, api, NetworkType)
+
+        sql = "SELECT %s FROM network_types" % \
+              ", ".join(NetworkType.fields)
+        
+        if types:
+            sql += " WHERE type IN (%s)" % ", ".join(map(api.db.quote, types))
+
+        self.selectall(sql)