From 913a304d359b2e29cecec2df47886657fcbf3e08 Mon Sep 17 00:00:00 2001
From: LtWorf <LtWorf@014f5005-505e-4b48-8d0a-63407b615a7c>
Date: Wed, 25 Jan 2012 15:46:11 +0000
Subject: [PATCH] - can import * - starting a common code to remove duplication
 in interfaces

git-svn-id: http://galileo.dmi.unict.it/svn/relational/trunk@344 014f5005-505e-4b48-8d0a-63407b615a7c
---
 relational/__init__.py    | 11 +++++++++++
 relational/maintenance.py | 39 ++++++++++++++++++++++++++++++++++++++-
 2 files changed, 49 insertions(+), 1 deletion(-)

diff --git a/relational/__init__.py b/relational/__init__.py
index e69de29..69a4487 100644
--- a/relational/__init__.py
+++ b/relational/__init__.py
@@ -0,0 +1,11 @@
+__all__ = (
+
+"relation"
+"parser"
+"optimizer"
+"optimizations"
+"rtypes"
+"parallel"
+
+
+)
diff --git a/relational/maintenance.py b/relational/maintenance.py
index f55fae4..4a14194 100644
--- a/relational/maintenance.py
+++ b/relational/maintenance.py
@@ -21,6 +21,7 @@
 
 import httplib
 import urllib
+import relation
 
 def send_survey(data):
     '''Sends the survey. Data must be a dictionary.
@@ -56,4 +57,40 @@ def check_latest_version():
     a=l[len(l)-1]
     
     s=a.find('"')+1
-    return a[s:a.find('"',s)-1]
\ No newline at end of file
+    return a[s:a.find('"',s)-1]
+
+class interface (Object):
+    '''It is used to provide services to the user interfaces, in order to
+    reduce the amount of duplicated code present in different user interfaces.
+    '''
+    
+    def __init__(self):
+        self.rels= {}
+    
+    def load(self,filename,name):
+        '''Loads a relation from file, and gives it a name to
+        be used in subsequent queries.'''
+        pass
+    
+    def unload(self,name):
+        '''Unloads an existing relation.'''
+        pass
+    
+    def store(self,filename,name):
+        '''Stores a relation to file.'''
+        pass
+    
+    def get_relation(self,name):
+        '''Returns the relation corresponding to name.'''
+        pass
+    
+    def set_relation(self,name,rel):
+        '''Sets the relation corresponding to name.'''
+        pass
+    
+    def execute(self,query,relname='last_'):
+        '''Executes a query, returns the result and if
+        relname is not None, adds the result to the
+        dictionary, with the name given in relname.'''
+        pass
+    
\ No newline at end of file