1

#!/usr/bin/env python

     2

# -*- coding: utf-8 -*-

     3

     4

# This file is part of Beremiz, a Integrated Development Environment for

     5

# programming IEC 61131-3 automates supporting plcopen standard and CanFestival.

     6

#

     7

# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD

     8

# Copyright (C) 2017: Andrey Skvortsov

     9

#

    10

# See COPYING file for copyrights details.

    11

#

    12

# This program is free software; you can redistribute it and/or

    13

# modify it under the terms of the GNU General Public License

    14

# as published by the Free Software Foundation; either version 2

    15

# of the License, or (at your option) any later version.

    16

#

    17

# This program is distributed in the hope that it will be useful,

    18

# but WITHOUT ANY WARRANTY; without even the implied warranty of

    19

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    20

# GNU General Public License for more details.

    21

#

    22

# You should have received a copy of the GNU General Public License

    23

# along with this program; if not, write to the Free Software

    24

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

    25

    26

# Package initialisation

    27

    28

    29

from __future__ import absolute_import

    30

from os import listdir, path

    31

import util.paths as paths

    32

    33

_base_path = paths.AbsDir(__file__)

    34

    35

def _GetLocalConnectorClassFactory(name):

    36

    return lambda: getattr(__import__(name, globals(), locals()), name + "_connector_factory")

    37

    38

    39

def _GetLocalConnectorClassDialog(name):

    40

    return lambda: getattr(__import__(name + '.dialog', globals(), locals(), fromlist=['dialog']), name + "_connector_dialog")

    41

    42

    43

def _GetLocalConnectorURITypes(name):

    44

    return lambda: getattr(__import__(name + '.dialog', globals(), locals(), fromlist=['dialog']), "URITypes", None)

    45

    46

    47

connectors = {name:

    48

              _GetLocalConnectorClassFactory(name)

    49

              for name in listdir(_base_path)

    50

              if (path.isdir(path.join(_base_path, name)) and

    51

                  not name.startswith("__"))}

    52

    53

connectors_dialog = {name:

    54

                     {"function": _GetLocalConnectorClassDialog(name), "URITypes": _GetLocalConnectorURITypes(name)}

    55

                     for name in listdir(_base_path)

    56

                     if (path.isdir(path.join(_base_path, name)) and

    57

                         not name.startswith("__"))}

    58

    59

    60

def ConnectorFactory(uri, confnodesroot):

    61

    """

    62

    Return a connector corresponding to the URI

    63

    or None if cannot connect to URI

    64

    """

    65

    servicetype = uri.split("://")[0].upper()

    66

    if servicetype == "LOCAL":

    67

        # Local is special case

    68

        # pyro connection to local runtime

    69

        # started on demand, listening on random port

    70

        servicetype = "PYRO"

    71

        runtime_port = confnodesroot.AppFrame.StartLocalRuntime(

    72

            taskbaricon=True)

    73

        uri = "PYROLOC://127.0.0.1:" + str(runtime_port)

    74

    elif servicetype in connectors:

    75

        pass

    76

    elif servicetype[-1] == 'S' and servicetype[:-1] in connectors:

    77

        servicetype = servicetype[:-1]

    78

    else:

    79

        return None

    80

    81

    # import module according to uri type

    82

    connectorclass = connectors[servicetype]()

    83

    return connectorclass(uri, confnodesroot)

    84

    85

    86

def ConnectorDialog(conn_type, confnodesroot):

    87

    if conn_type not in connectors_dialog:

    88

        return None

    89

    90

    connectorclass = connectors_dialog[conn_type]["function"]()

    91

    return connectorclass(confnodesroot)

    92

    93

    94

def GetConnectorFromURI(uri):

    95

    typeOfConnector = None

    96

    for conn_type in connectors_dialog:

    97

        connectorTypes = connectors_dialog[conn_type]["URITypes"]()

    98

        if connectorTypes and uri in connectorTypes:

    99

            typeOfConnector = conn_type

   100

            break

   101

   102

    return typeOfConnector