added Entity generic class. Part and Frame inherit from it

dream/simulation/Entity.py

+# ===========================================================================
+# Copyright 2013 Georgios Dagkakis
+#
+# This file is part of DREAM.
+#
+# DREAM is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# DREAM is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with DREAM.  If not, see <http://www.gnu.org/licenses/>.
+# ===========================================================================
+'''
+Created on 18 Aug 2013
+
+@author: George
+'''
+'''
+Class that acts as an abstract. It should have no instances. All the Entities should inherit from it
+'''
+
+#The entity object
+class Entity(object):
+
+    def __init__(self, name):
+        self.type="Entity"
+        self.name=name
+        self.currentStop=None      #contains the current object that the material is in 
+        self.creationTime=0
+        self.startTime=0           #holds the startTime for the lifespan
+        #dimension data
+        self.width=1.0
+        self.height=1.0
+        self.length=1.0
\ No newline at end of file

dream/simulation/Frame.py

@@ -28,13 +28,15 @@ models a frame entity. This can flow through the system and carry parts
 
 from SimPy.Simulation import *
 from Globals import G
+from Entity import Entity
 
 #The entity object
-class Frame(object):    
+class Frame(Entity):    
     type="Frame"
     numOfParts=4    #the number of parts that the frame can take
           
     def __init__(self, name):
+        self.type="Frame"
         self.name=name
         self.currentStop=None      #contains the current object that the material is in 
         self.creationTime=0

dream/simulation/Part.py

@@ -29,10 +29,11 @@ models a part entity that flows through the system
 
 from SimPy.Simulation import *
 from Globals import G
+from Entity import Entity
 
 
 #The entity object
-class Part(object):    
+class Part(Entity):    
     type="Part"
           
     def __init__(self, name):