recursive_plugin_provider.py
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00001 # Copyright (c) 2011, Dirk Thomas, Dorian Scholz, TU Darmstadt
00002 # All rights reserved.
00003 #
00004 # Redistribution and use in source and binary forms, with or without
00005 # modification, are permitted provided that the following conditions
00006 # are met:
00007 #
00008 #   * Redistributions of source code must retain the above copyright
00009 #     notice, this list of conditions and the following disclaimer.
00010 #   * Redistributions in binary form must reproduce the above
00011 #     copyright notice, this list of conditions and the following
00012 #     disclaimer in the documentation and/or other materials provided
00013 #     with the distribution.
00014 #   * Neither the name of the TU Darmstadt nor the names of its
00015 #     contributors may be used to endorse or promote products derived
00016 #     from this software without specific prior written permission.
00017 #
00018 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
00019 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00020 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
00021 # FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
00022 # COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
00023 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
00024 # BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
00025 # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
00026 # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00027 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
00028 # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
00029 # POSSIBILITY OF SUCH DAMAGE.
00030 
00031 import traceback
00032 
00033 from python_qt_binding.QtCore import qCritical
00034 
00035 from .composite_plugin_provider import CompositePluginProvider
00036 
00037 
00038 class RecursivePluginProvider(CompositePluginProvider):
00039 
00040     """Plugin provider which directly loads all discovered plugins (which should be plugin providers themselfs) and returns their discovered plugins."""
00041 
00042     def __init__(self, plugin_provider):
00043         super(RecursivePluginProvider, self).__init__([])
00044         self.setObjectName('RecursivePluginProvider')
00045 
00046         self._plugin_provider = plugin_provider
00047 
00048     def discover(self, discovery_data):
00049         # discover plugins, which are providers themselves
00050         plugin_descriptors = self._plugin_provider.discover(discovery_data)
00051 
00052         # instantiate plugins
00053         plugin_providers = []
00054         for plugin_descriptor in plugin_descriptors:
00055             try:
00056                 # pass None as PluginContext for PluginProviders
00057                 instance = self._plugin_provider.load(plugin_descriptor.plugin_id(), None)
00058             except Exception:
00059                 qCritical('RecursivePluginProvider.discover() loading plugin "%s" failed:\n%s' % (str(plugin_descriptor.plugin_id()), traceback.format_exc()))
00060             else:
00061                 if instance is not None:
00062                     plugin_providers.append(instance)
00063 
00064         # delegate discovery through instantiated plugin providers to base class
00065         self.set_plugin_providers(plugin_providers)
00066         return CompositePluginProvider.discover(self, discovery_data)


qt_gui
Author(s): Dirk Thomas
autogenerated on Fri Feb 3 2017 03:42:12