From 9f5ef34ac05de070a99fae07eb1a8087ba60a653 Mon Sep 17 00:00:00 2001
From: Sebastian Koslowski <koslowski@kit.edu>
Date: Fri, 20 Nov 2015 17:28:17 +0100
Subject: grc-refactor: move grc.base to grc.python.base
---
grc/python/base/Connection.py | 139 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 139 insertions(+)
create mode 100644 grc/python/base/Connection.py
(limited to 'grc/python/base/Connection.py')
diff --git a/grc/python/base/Connection.py b/grc/python/base/Connection.py
new file mode 100644
index 0000000000..8df0f5ad53
--- /dev/null
+++ b/grc/python/base/Connection.py
@@ -0,0 +1,139 @@
+"""
+Copyright 2008-2011 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
+"""
+
+from .Element import Element
+from . import odict
+
+
+class Connection(Element):
+
+ def __init__(self, flow_graph, porta, portb):
+ """
+ Make a new connection given the parent and 2 ports.
+
+ Args:
+ flow_graph: the parent of this element
+ porta: a port (any direction)
+ portb: a port (any direction)
+ @throws Error cannot make connection
+
+ Returns:
+ a new connection
+ """
+ Element.__init__(self, flow_graph)
+ source = sink = None
+ #separate the source and sink
+ for port in (porta, portb):
+ if port.is_source(): source = port
+ if port.is_sink(): sink = port
+ if not source: raise ValueError('Connection could not isolate source')
+ if not sink: raise ValueError('Connection could not isolate sink')
+ busses = len(filter(lambda a: a.get_type() == 'bus', [source, sink]))%2
+ if not busses == 0: raise ValueError('busses must get with busses')
+
+ if not len(source.get_associated_ports()) == len(sink.get_associated_ports()):
+ raise ValueError('port connections must have same cardinality');
+ #ensure that this connection (source -> sink) is unique
+ for connection in self.get_parent().get_connections():
+ if connection.get_source() is source and connection.get_sink() is sink:
+ raise LookupError('This connection between source and sink is not unique.')
+ self._source = source
+ self._sink = sink
+ if source.get_type() == 'bus':
+
+ sources = source.get_associated_ports();
+ sinks = sink.get_associated_ports();
+
+ for i in range(len(sources)):
+ try:
+ flow_graph.connect(sources[i], sinks[i]);
+ except:
+ pass
+
+ def __str__(self):
+ return 'Connection (\n\t%s\n\t\t%s\n\t%s\n\t\t%s\n)'%(
+ self.get_source().get_parent(),
+ self.get_source(),
+ self.get_sink().get_parent(),
+ self.get_sink(),
+ )
+
+ def is_connection(self): return True
+
+ def validate(self):
+ """
+ Validate the connections.
+ The ports must match in type.
+ """
+ Element.validate(self)
+ platform = self.get_parent().get_parent()
+ source_domain = self.get_source().get_domain()
+ sink_domain = self.get_sink().get_domain()
+ if (source_domain, sink_domain) not in platform.get_connection_templates():
+ self.add_error_message('No connection known for domains "%s", "%s"'
+ % (source_domain, sink_domain))
+ too_many_other_sinks = (
+ source_domain in platform.get_domains() and
+ not platform.get_domain(key=source_domain)['multiple_sinks'] and
+ len(self.get_source().get_enabled_connections()) > 1
+ )
+ too_many_other_sources = (
+ sink_domain in platform.get_domains() and
+ not platform.get_domain(key=sink_domain)['multiple_sources'] and
+ len(self.get_sink().get_enabled_connections()) > 1
+ )
+ if too_many_other_sinks:
+ self.add_error_message(
+ 'Domain "%s" can have only one downstream block' % source_domain)
+ if too_many_other_sources:
+ self.add_error_message(
+ 'Domain "%s" can have only one upstream block' % sink_domain)
+
+ def get_enabled(self):
+ """
+ Get the enabled state of this connection.
+
+ Returns:
+ true if source and sink blocks are enabled
+ """
+ return self.get_source().get_parent().get_enabled() and \
+ self.get_sink().get_parent().get_enabled()
+
+ #############################
+ # Access Ports
+ #############################
+ def get_sink(self): return self._sink
+ def get_source(self): return self._source
+
+ ##############################################
+ ## Import/Export Methods
+ ##############################################
+ def export_data(self):
+ """
+ Export this connection's info.
+
+ Returns:
+ a nested data odict
+ """
+ n = odict()
+ n['source_block_id'] = self.get_source().get_parent().get_id()
+ n['sink_block_id'] = self.get_sink().get_parent().get_id()
+ n['source_key'] = self.get_source().get_key()
+ n['sink_key'] = self.get_sink().get_key()
+ return n
--
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