multi_library_class_loader.cpp
Go to the documentation of this file.
00001 /*
00002  * Copyright (c) 2012, Willow Garage, Inc.
00003  * All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions 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 copyright
00011  *       notice, this list of conditions and the following disclaimer in the
00012  *       documentation and/or other materials provided with the distribution.
00013  *     * Neither the name of the Willow Garage, Inc. nor the names of its
00014  *       contributors may be used to endorse or promote products derived from
00015  *       this software without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00018  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00019  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00020  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
00021  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
00022  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
00023  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
00024  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
00025  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
00026  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
00027  * POSSIBILITY OF SUCH DAMAGE.
00028  */
00029 
00030 #include "class_loader/multi_library_class_loader.h"
00031 
00032 namespace class_loader
00033 {
00034 
00035 MultiLibraryClassLoader::MultiLibraryClassLoader(bool enable_ondemand_loadunload) :
00036 enable_ondemand_loadunload_(enable_ondemand_loadunload)
00037 {
00038 }
00039 
00040 MultiLibraryClassLoader::~MultiLibraryClassLoader()
00041 {
00042   shutdownAllClassLoaders();
00043 }
00044 
00045 std::vector<std::string> MultiLibraryClassLoader::getRegisteredLibraries()
00046 {
00047   std::vector<std::string> libraries;
00048   for(LibraryToClassLoaderMap::iterator itr = active_class_loaders_.begin(); itr != active_class_loaders_.end(); itr++)
00049     libraries.push_back(itr->first);
00050   return(libraries);
00051 }
00052 
00053 ClassLoader* MultiLibraryClassLoader::getClassLoaderForLibrary(const std::string& library_path)
00054 {
00055   LibraryToClassLoaderMap::iterator itr = active_class_loaders_.find(library_path);
00056   if (itr != active_class_loaders_.end()) return itr->second;
00057   else return NULL;
00058 }
00059 
00060 ClassLoaderVector MultiLibraryClassLoader::getAllAvailableClassLoaders()
00061 {
00062   ClassLoaderVector loaders;
00063   for(LibraryToClassLoaderMap::iterator itr = active_class_loaders_.begin(); itr != active_class_loaders_.end(); itr++)
00064     loaders.push_back(itr->second);
00065   return(loaders);
00066 }
00067 
00068 bool MultiLibraryClassLoader::isLibraryAvailable(const std::string& library_name)
00069 {
00070   return (getClassLoaderForLibrary(library_name) != NULL);
00071 }
00072 
00073 void MultiLibraryClassLoader::loadLibrary(const std::string& library_path)
00074 {
00075   if(!isLibraryAvailable(library_path))
00076     active_class_loaders_[library_path] = new class_loader::ClassLoader(library_path, isOnDemandLoadUnloadEnabled());
00077 }
00078 
00079 void MultiLibraryClassLoader::shutdownAllClassLoaders()
00080 {
00081   std::vector<std::string> available_libraries = getRegisteredLibraries();
00082   for(unsigned int c = 0; c < available_libraries.size(); c++)
00083     unloadLibrary(available_libraries.at(c));
00084 }
00085 
00086 int MultiLibraryClassLoader::unloadLibrary(const std::string& library_path)
00087 {
00088   int remaining_unloads = 0;
00089   LibraryToClassLoaderMap::iterator itr = active_class_loaders_.find(library_path);
00090   if (itr != active_class_loaders_.end())
00091   {
00092     ClassLoader* loader = itr->second;
00093     if((remaining_unloads = loader->unloadLibrary()) == 0)
00094     {
00095       delete(loader);
00096       active_class_loaders_.erase(itr);
00097     }
00098   }
00099   return(remaining_unloads);
00100 }
00101 
00102 }


class_loader
Author(s): Mirza Shah
autogenerated on Fri Jul 28 2017 05:48:18