Connection.py

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"""
Copyright 2008 Free Software Foundation, Inc.
This file is part of GNU Radio

GNU Radio Companion is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

GNU Radio Companion 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
"""
##@package grc_gnuradio.Connection
#Flow graph connection.
#A connection exists between 2 ports.
#One port must be input, one output.
#The port decided whether it can have the connection.
#@author Josh Blum

from grc.elements.Connection import Connection as _Connection

class Connection(_Connection):
        
        def validate(self):
                """
                Validate the connections.
                The ports must match in type and vector length.
                """
                _Connection.validate(self) #checks type
                #check vector length
                source_vlen = self.get_source().get_vlen()
                sink_vlen = self.get_sink().get_vlen()
                try: assert(source_vlen == sink_vlen)
                except AssertionError: self._add_error_message('Source vector length "%s" does not match sink vector length "%s".'%(source_vlen, sink_vlen))
                
                

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