Merge branch 'develop' into SELX-138-stop-ATen-build-if-python-is-not-found

Applications/CommandLineInterface/src/selxSuperElastix.cxx

@@ -72,43 +72,58 @@ main( int ac, char * av[] )
 {
 
   selx::Logger::Pointer logger = selx::Logger::New();
+  
+  typedef std::vector< std::string > VectorOfStringsType;
+  typedef std::vector< boost::filesystem::path > VectorOfPathsType;
 
-  try
-  {
-    typedef std::vector< std::string > VectorOfStringsType;
-    typedef std::vector< boost::filesystem::path > VectorOfPathsType;
+  boost::filesystem::path logPath;
+  // default log level
+  selx::LogLevel logLevel = selx::LogLevel::WRN;
 
-    boost::filesystem::path logPath;
-    // default log level
-    selx::LogLevel logLevel = selx::LogLevel::WRN;
+  boost::filesystem::path            configurationPath;
+  VectorOfPathsType                   configurationPaths;
 
-    boost::filesystem::path            configurationPath;
-    VectorOfPathsType                   configurationPaths;
+  VectorOfStringsType inputPairs;
+  VectorOfStringsType outputPairs;
 
-    VectorOfStringsType inputPairs;
-    VectorOfStringsType outputPairs;
+  boost::program_options::variables_map vm;
 
+  try
+  {
     boost::program_options::options_description desc("Allowed options");
     desc.add_options()
       ( "help", "produce help message" )
-      ("conf", boost::program_options::value< VectorOfPathsType >(&configurationPaths)->required()->multitoken(), "Configuration file")
-      ("in", boost::program_options::value< VectorOfStringsType >(&inputPairs)->multitoken(), "Input data: images, labels, meshes, etc. Usage <name>=<path>")
-      ("out", boost::program_options::value< VectorOfStringsType >(&outputPairs)->multitoken(), "Output data: images, labels, meshes, etc. Usage <name>=<path>")
+      ("conf", boost::program_options::value< VectorOfPathsType >(&configurationPaths)->required()->multitoken(), "Configuration file: single or multiple Blueprints [.xml|.json]")
+      ("in", boost::program_options::value< VectorOfStringsType >(&inputPairs)->multitoken(), "Input data: images, labels, meshes, etc. Usage arg: <name>=<path> (or multiple pairs)")
+      ("out", boost::program_options::value< VectorOfStringsType >(&outputPairs)->multitoken(), "Output data: images, labels, meshes, etc. Usage arg: <name>=<path> (or multiple pairs)")
       ("graphout", boost::program_options::value< boost::filesystem::path >(), "Output Graphviz dot file")
       ("logfile", boost::program_options::value< boost::filesystem::path >(&logPath), "Log output file")
-      ("loglevel", boost::program_options::value< selx::LogLevel >(&logLevel), "Log level")
+      ("loglevel", boost::program_options::value< selx::LogLevel >(&logLevel), "Log level [off|critical|error|warning|info|debug|trace]")
       ;
 
-    boost::program_options::variables_map vm;
     boost::program_options::store(boost::program_options::parse_command_line(ac, av, desc), vm);
-    boost::program_options::notify(vm);
 
     if( vm.count( "help" ) )
     {
       std::cout << desc << "\n";
       return 0;
     }
+    boost::program_options::notify(vm);
+  }
+  catch (std::exception& e)
+  {
+    std::cerr << "Error: " << e.what() << "\n";
+    std::cerr << "See 'SuperElastix --help' for help" << "\n";
+    return 1;
+  }
+  catch (...)
+  {
+    std::cerr << "Unknown error!" << "\n";
+    return 1;
+  }
 
+  try 
+  {
     // optionally, stream to log file
     std::ofstream outfile;
     if ( vm.count("logfile") )
@@ -149,7 +164,6 @@ main( int ac, char * av[] )
     if( vm.count( "in" ) )
     {
       logger->Log( selx::LogLevel::INF, "Preparing input data ... ");
-      int index = 0;
       for( const auto & inputPair : inputPairs )
       {
         VectorOfStringsType nameAndPath;
@@ -159,15 +173,12 @@ main( int ac, char * av[] )
 
         // since we do not know which reader type we should instantiate for input "name",
         // we ask SuperElastix for a reader that matches the type of the source component "name"
-        logger->Log( selx::LogLevel::INF, "Preparing input " + name + " ..." );
+        logger->Log( selx::LogLevel::INF, "Preparing input '" + name + "': " + path + " ..." );
         selx::AnyFileReader::Pointer reader = superElastixFilter->GetInputFileReader( name );
         reader->SetFileName( path );
         superElastixFilter->SetInput( name, reader->GetOutput() );
         fileReaders.push_back( reader );
-
-        logger->Log( selx::LogLevel::INF, "Preparing input " + name +  "... Done" );
-        std::cout << "Input data " << index << " " << name << " : " << path << "\n";
-        ++index;
+        logger->Log( selx::LogLevel::INF, "Preparing input '" + name + "': " + path + " ... Done" );
       }
       logger->Log( selx::LogLevel::INF, "Preparing input data ... Done");
     }
@@ -179,7 +190,6 @@ main( int ac, char * av[] )
     if( vm.count( "out" ) )
     {
       logger->Log( selx::LogLevel::INF, "Preparing output data ... ");
-      int index = 0;
       for( const auto & outputPair : outputPairs )
       {
         VectorOfStringsType nameAndPath;
@@ -189,16 +199,12 @@ main( int ac, char * av[] )
 
         // since we do not know which writer type we should instantiate for output "name",
         // we ask SuperElastix for a writer that matches the type of the sink component "name"
-        logger->Log( selx::LogLevel::INF, "Preparing output " + name + " ..." );
+        logger->Log( selx::LogLevel::INF, "Preparing output '" + name + "': " + path + " ..." );
         selx::AnyFileWriter::Pointer writer = superElastixFilter->GetOutputFileWriter( name );
-        //ImageWriter2DType::Pointer writer = ImageWriter2DType::New();
         writer->SetFileName( path );
-        //writer->SetInput(superElastixFilter->GetOutput<Image2DType>(name));
         writer->SetInput( superElastixFilter->GetOutput( name ) );
         fileWriters.push_back( writer );
-        logger->Log( selx::LogLevel::INF, "Preparing output " + name + " ... Done" );
-        ++index;
-
+        logger->Log( selx::LogLevel::INF, "Preparing output '" + name + "': " + path + " ... Done" );
       }
     }
     else
@@ -216,14 +222,17 @@ main( int ac, char * av[] )
   }
   catch( std::exception & e )
   {
-    logger->Log( selx::LogLevel::ERR, "Executing ... Error");
-    std::cerr << "error: " << e.what() << "\n";
+    logger->Log( selx::LogLevel::CRT, "Executing ... Error");
+    logger->Log( selx::LogLevel::CRT, e.what());
+    std::cerr << e.what();
     return 1;
   }
   catch( ... )
   {
-    logger->Log( selx::LogLevel::ERR, "Executing ... Error");
-    std::cerr << "Exception of unknown type!\n";
+    logger->Log( selx::LogLevel::CRT, "Executing ... Error");
+    logger->Log( selx::LogLevel::CRT, "Exception of unknown type!");
+    std::cerr << "Exception of unknown type!";
+    return 1;
   }
 
   return 0;

Modules/Blueprints/include/selxBlueprint.h

@@ -58,6 +58,7 @@ public:
 
   /* m_Blueprint is initialized in the default constructor */
   Blueprint();
+  ~Blueprint();
 
   /** The actual blueprint is a pimpled member variable */
   typedef std::unique_ptr< BlueprintImpl > BlueprintImplPointer;
@@ -86,7 +87,7 @@ public:
   //std::unique_ptr<BlueprintImpl> Clone(BlueprintImpl const &other );
 
   // "functional" composition of blueprints is done by adding settings of other to this blueprint. Redefining/overwriting properties is not allowed and returns false.
-  bool ComposeWith( Blueprint::ConstPointer other );
+  bool ComposeWith( const Blueprint * other );
 
   // Returns a vector of the Component names at the incoming direction
   ComponentNamesType GetInputNames( const ComponentNameType name ) const;
@@ -103,10 +104,13 @@ public:
   void MergeFromFile(const std::string& filename);
 
   void SetLogger( Logger::Pointer logger );
+
 private:
 
-  BlueprintImplPointer m_Blueprint;
+  // The order of the logger and the blueprint matters, since the lifetime of the logger should always exceed that of the blueprint.
   Logger::Pointer m_Logger;
+  BlueprintImplPointer m_BlueprintImpl;
+
 };
 }
 

Modules/Blueprints/src/selxBlueprint.cxx

@@ -24,25 +24,28 @@ namespace selx
 {
 
 Blueprint
-::Blueprint()
+::Blueprint() : 
+  m_Logger( Logger::New() ), // Create default logger which redirects to std::cout
+  m_BlueprintImpl( new BlueprintImpl( this->m_Logger->GetLoggerImpl() ) ) 
 {
-  // Create default logger which redirects to std::cout
-  this->m_Logger = Logger::New();
   //TODO: cannot have independent loggers redirecting to cout. 
   //this->m_Logger->AddStream("cout", std::cout);
   //TODO: this seems to affect other instantiated loggers too.
   //this->m_Logger->SetLogLevel(selx::LogLevel::INF);
 
-  this->m_Blueprint = BlueprintImplPointer( new BlueprintImpl( this->m_Logger->GetLoggerImpl() ) );
-  
 }
 
+// This class uses the pimpl idiom and therefore needs to implement the destructor explicitly: Effective Modern C++, Scott Meyers, item 22
+Blueprint
+::~Blueprint()
+{
+}
 
 const BlueprintImpl &
 Blueprint
 ::GetBlueprintImpl( void ) const
 {
-  return *this->m_Blueprint;
+  return *this->m_BlueprintImpl;
 }
 
 
@@ -51,7 +54,7 @@ Blueprint
 ::SetComponent( ComponentNameType name, ParameterMapType parameterMap )
 {
   this->Modified();
-  return this->m_Blueprint->SetComponent( name, parameterMap );
+  return this->m_BlueprintImpl->SetComponent( name, parameterMap );
 }
 
 
@@ -59,7 +62,7 @@ Blueprint::ParameterMapType
 Blueprint
 ::GetComponent( ComponentNameType componentName ) const
 {
-  return this->m_Blueprint->GetComponent( componentName );
+  return this->m_BlueprintImpl->GetComponent( componentName );
 }
 
 
@@ -68,14 +71,14 @@ Blueprint
 ::DeleteComponent( ComponentNameType componentName )
 {
   this->Modified();
-  return this->m_Blueprint->DeleteComponent( componentName );
+  return this->m_BlueprintImpl->DeleteComponent( componentName );
 }
 
 
 Blueprint::ComponentNamesType
 Blueprint::GetComponentNames( void ) const
 {
-  return this->m_Blueprint->GetComponentNames();
+  return this->m_BlueprintImpl->GetComponentNames();
 }
 
 
@@ -84,7 +87,7 @@ Blueprint
 ::SetConnection( ComponentNameType upstream, ComponentNameType downstream, ParameterMapType parameterMap )
 {
   this->Modified();
-  return this->m_Blueprint->SetConnection( upstream, downstream, parameterMap );
+  return this->m_BlueprintImpl->SetConnection( upstream, downstream, parameterMap );
 }
 
 
@@ -92,7 +95,7 @@ Blueprint::ParameterMapType
 Blueprint
 ::GetConnection( ComponentNameType upstream, ComponentNameType downstream ) const
 {
-  return this->m_Blueprint->GetConnection( upstream, downstream );
+  return this->m_BlueprintImpl->GetConnection( upstream, downstream );
 }
 
 
@@ -101,7 +104,7 @@ Blueprint
 ::DeleteConnection( ComponentNameType upstream, ComponentNameType downstream )
 {
   this->Modified();
-  return this->m_Blueprint->DeleteConnection( upstream, downstream );
+  return this->m_BlueprintImpl->DeleteConnection( upstream, downstream );
 }
 
 
@@ -109,7 +112,7 @@ bool
 Blueprint
 ::ComponentExists( ComponentNameType componentName ) const
 {
-  return this->m_Blueprint->ComponentExists( componentName );
+  return this->m_BlueprintImpl->ComponentExists( componentName );
 }
 
 
@@ -117,16 +120,16 @@ bool
 Blueprint
 ::ConnectionExists( ComponentNameType upstream, ComponentNameType downstream ) const
 {
-  return this->m_Blueprint->ConnectionExists( upstream, downstream );
+  return this->m_BlueprintImpl->ConnectionExists( upstream, downstream );
 }
 
 
 bool
 Blueprint
-::ComposeWith( Blueprint::ConstPointer other)
+::ComposeWith( const Blueprint * other)
 {
   this->Modified();
-  return this->m_Blueprint->ComposeWith( other->GetBlueprintImpl() );
+  return this->m_BlueprintImpl->ComposeWith( other->GetBlueprintImpl() );
 }
 
 
@@ -134,7 +137,7 @@ Blueprint::ComponentNamesType
 Blueprint
 ::GetOutputNames( const ComponentNameType name ) const
 {
-  return this->m_Blueprint->GetOutputNames( name );
+  return this->m_BlueprintImpl->GetOutputNames( name );
 }
 
 
@@ -142,7 +145,7 @@ Blueprint::ComponentNamesType
 Blueprint
 ::GetInputNames( const ComponentNameType name ) const
 {
-  return this->m_Blueprint->GetInputNames( name );
+  return this->m_BlueprintImpl->GetInputNames( name );
 }
 
 
@@ -150,14 +153,14 @@ void
 Blueprint
 ::Write( const std::string filename )
 {
-  this->m_Blueprint->Write( filename );
+  this->m_BlueprintImpl->Write( filename );
 }
 
 void
 Blueprint
 ::MergeFromFile( const std::string& filename )
 {
-  this->m_Blueprint->MergeFromFile( filename );
+  this->m_BlueprintImpl->MergeFromFile( filename );
 }
 
 void
@@ -165,7 +168,7 @@ Blueprint
 ::SetLogger( Logger::Pointer logger )
 {
   this->m_Logger = logger;
-  this->m_Blueprint->SetLoggerImpl( logger->GetLoggerImpl() );
+  this->m_BlueprintImpl->SetLoggerImpl( logger->GetLoggerImpl() );
 }
 
 

Modules/Blueprints/src/selxBlueprintImpl.cxx

@@ -94,10 +94,6 @@ make_edge_label_writer( ParameterMapType p )
   return edge_label_writer< ParameterMapType >( p );
 }
 
-// TODO: remove this argumentless constructor
-BlueprintImpl::BlueprintImpl( void ) : m_LoggerImpl(&(Logger::New()->GetLoggerImpl()))
-{
-}
 
 BlueprintImpl::BlueprintImpl( LoggerImpl & loggerImpl ) : m_LoggerImpl(&loggerImpl)
 {
@@ -128,6 +124,7 @@ BlueprintImpl
   {
     std::stringstream msg;
     msg << "BlueprintImpl does not contain component " << name << std::endl;
+    this->m_LoggerImpl->Log(LogLevel::CRT, msg.str());
     throw std::runtime_error( msg.str() );
   }
 
@@ -168,6 +165,7 @@ BlueprintImpl
 {
   if( !this->ComponentExists( upstream ) || !this->ComponentExists( downstream ) )
   {
+    this->m_LoggerImpl->Log(LogLevel::WRN, "Setting a connection between components '{}' and '{}' failed: one or more components do not exist");
     return false;
   }
 
@@ -391,6 +389,7 @@ BlueprintImpl
   // This function is part of the internal API and should fail hard if we use it incorrectly
   if( !this->ConnectionExists( upstream, downstream ) )
   {
+    this->m_LoggerImpl->Log(LogLevel::CRT, "BlueprintImpl does not contain connection from component {} to {}.", upstream, downstream );
     throw std::runtime_error( "BlueprintImpl does not contain connection from component " + upstream + " to " + downstream );
   }
 
@@ -538,7 +537,7 @@ BlueprintImpl::FromPropertyTree(const PropertyTreeType & pt)
     std::string connectionName = v.second.data();
     if (connectionName != "")
     {
-      this->m_LoggerImpl->Log(LogLevel::INF, "Found {0}, but connection names are ignored.", connectionName);
+      this->m_LoggerImpl->Log(LogLevel::TRC, "Found {0}, but connection names are ignored.", connectionName);
     }
     std::string      outName;
     std::string      inName;
@@ -654,7 +653,7 @@ BlueprintImpl::MergeProperties(const PropertyTreeType & pt)
     std::string connectionName = v.second.data();
     if (connectionName != "")
     {
-      this->m_LoggerImpl->Log(LogLevel::INF, "Found {0}, but connection names are ignored.", connectionName);
+      this->m_LoggerImpl->Log(LogLevel::TRC, "Found {0}, but connection names are ignored.", connectionName);
     }
     std::string      outName;
     std::string      inName;

Modules/Blueprints/src/selxBlueprintImpl.h

@@ -99,9 +99,6 @@ public:
   typedef boost::graph_traits< GraphType >::out_edge_iterator OutputIteratorType;
   typedef std::pair< OutputIteratorType, OutputIteratorType > OutputIteratorPairType;
 
-  // TODO: remove this argumentless constructor
-  BlueprintImpl();
-
   BlueprintImpl( LoggerImpl & loggerImpl);
 
 

Modules/Blueprints/test/selxBlueprintTest.cxx

@@ -48,8 +48,7 @@ public:
 
 TEST_F( BlueprintTest, SetGetDeleteComponent )
 {
-  std::unique_ptr< BlueprintImpl > blueprint;
-  EXPECT_NO_THROW( blueprint = std::unique_ptr< BlueprintImpl >( new BlueprintImpl() ) );
+  auto blueprint = Blueprint::New();
 
   bool success0;
   EXPECT_NO_THROW( success0 = blueprint->SetComponent( "MyComponentName", parameterMap ) );
@@ -80,8 +79,7 @@ TEST_F( BlueprintTest, BlueprintObjectSetGetDeleteComponent )
 
 TEST_F( BlueprintTest, SetGetDeleteConnection )
 {
-  std::unique_ptr< BlueprintImpl > blueprint;
-  EXPECT_NO_THROW( blueprint = std::unique_ptr< BlueprintImpl >( new BlueprintImpl() ) );
+  auto blueprint = Blueprint::New();
 
   blueprint->SetComponent( "Component0", parameterMap );
   blueprint->SetComponent( "Component1", parameterMap );
@@ -126,12 +124,13 @@ TEST_F( BlueprintTest, SetGetDeleteConnection )
 
 TEST_F( BlueprintTest, CopyConstuctor )
 {
-  std::unique_ptr< BlueprintImpl > baseBlueprint;
-  EXPECT_NO_THROW( baseBlueprint = std::unique_ptr< BlueprintImpl >( new BlueprintImpl() ) );
-
+  auto baseBlueprint = Blueprint::New();
   baseBlueprint->SetComponent( "Component0", { { "OperationType", { "Transform" } } } );
+
+  auto baseBlueprintImpl = baseBlueprint->GetBlueprintImpl();
+
   std::unique_ptr< BlueprintImpl > clonedBaseBlueprint;
-  EXPECT_NO_THROW( clonedBaseBlueprint = std::make_unique< BlueprintImpl >( *baseBlueprint.get() ) );
+  EXPECT_NO_THROW( clonedBaseBlueprint = std::make_unique< BlueprintImpl >( baseBlueprintImpl ) );
 
   EXPECT_NO_THROW( clonedBaseBlueprint->SetComponent( "Component1", { { "OperationType", { "Source" } }, { "Dimensionality", { "3" } } } ) );
 
@@ -144,48 +143,43 @@ TEST_F( BlueprintTest, CopyConstuctor )
 
 TEST_F( BlueprintTest, Compose )
 {
-  std::unique_ptr< BlueprintImpl > baseBlueprint;
-  EXPECT_NO_THROW( baseBlueprint = std::unique_ptr< BlueprintImpl >( new BlueprintImpl() ) );
+  auto baseBlueprint = Blueprint::New();
 
   baseBlueprint->SetComponent( "Component0", { { "OperationType", { "Transform" } } } );
   baseBlueprint->SetComponent( "Component1", { { "OperationType", { "Source" } }, { "Dimensionality", { "3" } } } );
 
   // compose-in a new 3rd component Component2
-  std::unique_ptr< BlueprintImpl > nonConflictingBlueprint0;
-  EXPECT_NO_THROW( nonConflictingBlueprint0 = std::unique_ptr< BlueprintImpl >( new BlueprintImpl() ) );
-
+  auto nonConflictingBlueprint0 = Blueprint::New();
+  
   nonConflictingBlueprint0->SetComponent( "Component2", { { "OperationType", { "Sink" } } } );
 
-  EXPECT_TRUE( baseBlueprint->ComposeWith( *nonConflictingBlueprint0 ) );
+  EXPECT_TRUE( baseBlueprint->ComposeWith( nonConflictingBlueprint0 ) );
   EXPECT_STREQ( "Sink", baseBlueprint->GetComponent( "Component2" )[ "OperationType" ][ 0 ].c_str() );
 
   // compose-in additional properties of Component0 and Component1
-  std::unique_ptr< BlueprintImpl > nonConflictingBlueprint1;
-  EXPECT_NO_THROW( nonConflictingBlueprint1 = std::unique_ptr< BlueprintImpl >( new BlueprintImpl() ) );
-
+  auto nonConflictingBlueprint1 = Blueprint::New();
+  
   nonConflictingBlueprint1->SetComponent( "Component0", { { "TranformationGroup", { "Diffeomorphic" } }, { "PixelType", { "float" } } } );
   nonConflictingBlueprint1->SetComponent( "Component1", { { "NameOfClass", { "ImageSourceClass" } } } );
 
-  EXPECT_TRUE( baseBlueprint->ComposeWith( *nonConflictingBlueprint1 ) );
+  EXPECT_TRUE( baseBlueprint->ComposeWith( nonConflictingBlueprint1 ) );
   EXPECT_STREQ( "Transform", baseBlueprint->GetComponent( "Component0" )[ "OperationType" ][ 0 ].c_str() );
   EXPECT_STREQ( "Diffeomorphic", baseBlueprint->GetComponent( "Component0" )[ "TranformationGroup" ][ 0 ].c_str() );
   EXPECT_STREQ( "ImageSourceClass", baseBlueprint->GetComponent( "Component1" )[ "NameOfClass" ][ 0 ].c_str() );
 
   // compose-in existing component with existing property key, but equal property value(s). Nothing happens actually (i.e. idempotency)
-  std::unique_ptr< BlueprintImpl > nonConflictingBlueprint2;
-  EXPECT_NO_THROW( nonConflictingBlueprint2 = std::unique_ptr< BlueprintImpl >( new BlueprintImpl() ) );
+  auto nonConflictingBlueprint2 = Blueprint::New();
 
   nonConflictingBlueprint2->SetComponent( "Component0", { { "PixelType", { "float" } } } );
 
-  EXPECT_TRUE( baseBlueprint->ComposeWith( *nonConflictingBlueprint2 ) );
+  EXPECT_TRUE( baseBlueprint->ComposeWith( nonConflictingBlueprint2 ) );
 
   // trying to overwrite properties fails
-  std::unique_ptr< BlueprintImpl > conflictingBlueprint0;
-  EXPECT_NO_THROW( conflictingBlueprint0 = std::unique_ptr< BlueprintImpl >( new BlueprintImpl() ) );
+  auto conflictingBlueprint0 = Blueprint::New();
   conflictingBlueprint0->SetComponent( "Component1", { { "Dimensionality", { "2" } }, { "InternalComputationValueType", { "float" } } } );
 
   // Compose fails and returns false
-  EXPECT_FALSE( baseBlueprint->ComposeWith( *conflictingBlueprint0 ) );
+  EXPECT_FALSE( baseBlueprint->ComposeWith( conflictingBlueprint0 ) );
 
   //baseBlueprint should not have been altered by a failing compose operation
   EXPECT_STREQ( "3", baseBlueprint->GetComponent( "Component1" )[ "Dimensionality" ][ 0 ].c_str() );

Modules/Core/include/selxNetworkBuilder.hxx

@@ -58,7 +58,7 @@ NetworkBuilder< ComponentList >::Configure()
     this->ApplyComponentConfiguration();
     auto nonUniqueComponentNames = this->GetNonUniqueComponentNames();
     this->m_Logger.Log(  LogLevel::INF,
-                         "Applying component criteria ... Done. {0:d} out of {1:d} components was uniquely selected.",
+                         "Applying component criteria ... Done. {0:d} out of {1:d} components were uniquely selected.",
                          m_Blueprint.GetComponentNames().size()-nonUniqueComponentNames.size(),
                          m_Blueprint.GetComponentNames().size() );
 
@@ -66,18 +66,17 @@ NetworkBuilder< ComponentList >::Configure()
     this->ApplyConnectionConfiguration();
     nonUniqueComponentNames = this->GetNonUniqueComponentNames();
     this->m_Logger.Log(  LogLevel::INF,
-                         "Applying connection criteria ... Done. {0:d} out of {1:d} components was uniquely selected.",
+                         "Applying connection criteria ... Done. {0:d} out of {1:d} components were uniquely selected.",
                          m_Blueprint.GetComponentNames().size()-nonUniqueComponentNames.size(),
                          m_Blueprint.GetComponentNames().size() );
 
     if( nonUniqueComponentNames.size() > 0 )
     {
-      this->m_Logger.Log( LogLevel::INF, "{0} components have unsatisfied connections.", nonUniqueComponentNames.size() );
       this->m_Logger.Log( LogLevel::INF, "Performing handshakes between unique and non-unique component(s) ..." );
       this->PropagateConnectionsWithUniqueComponents();
       nonUniqueComponentNames = this->GetNonUniqueComponentNames();
       this->m_Logger.Log(  LogLevel::INF,
-                           "Performing handshakes between unique and non-unique component(s) ... Done. {0:d} out of {1:d} components was uniquely selected.",
+                           "Performing handshakes between unique and non-unique component(s) ... Done. {0:d} out of {1:d} components were uniquely selected.",
                            m_Blueprint.GetComponentNames().size()-nonUniqueComponentNames.size(),
                            m_Blueprint.GetComponentNames().size() );
     }
@@ -151,7 +150,7 @@ NetworkBuilder< ComponentList >::ApplyComponentConfiguration()
       currentComponentSelector->AddCriterion( criterion );
       
       this->m_Logger.Log( LogLevel::DBG,
-                          "Finding component for {0}: {1} component(s) satisfies {2} equal {3} and previous criteria.",
+        "Finding component for '{0}': {1} component(s) satisfies {{ '{2}' : '{3}' }}  and previous criteria.",
                           componentName,
                           currentComponentSelector->NumberOfComponents(),
                           criterion.first,
@@ -189,7 +188,7 @@ NetworkBuilder< ComponentList >::ApplyConnectionConfiguration()
     {
       BlueprintImpl::ParameterMapType connectionProperties = this->m_Blueprint.GetConnection( providingComponentName, acceptingComponentName );
 
-      // TODO: Is there a more elegant alternative to manual conversion between types?
+      // TODO: #110
       ComponentBase::InterfaceCriteriaType interfaceCriteria;
       for( const auto& connectionProperty : connectionProperties )
       {
@@ -200,16 +199,18 @@ NetworkBuilder< ComponentList >::ApplyConnectionConfiguration()
       }
 
       this->m_ComponentSelectorContainer[ providingComponentName ]->AddProvidingInterfaceCriteria( interfaceCriteria );
-      this->m_ComponentSelectorContainer[ acceptingComponentName ]->AddAcceptingInterfaceCriteria( interfaceCriteria );
+      this->m_Logger.Log(LogLevel::DBG,
+        "Finding component for '{0}': {1} component(s) satisfies 'ProvidingInterface' {2} and previous criteria.",
+        providingComponentName,
+        this->m_ComponentSelectorContainer[providingComponentName]->NumberOfComponents(),
+        this->m_Logger << interfaceCriteria );
 
-      if( !interfaceCriteria.empty() )
-      {
-        this->m_Logger.Log( LogLevel::DBG,
-                            "{0} can connect to {1} via {2}.",
-                            providingComponentName,
-                            acceptingComponentName,
-                            this->m_Logger << interfaceCriteria );
-      }
+      this->m_ComponentSelectorContainer[ acceptingComponentName ]->AddAcceptingInterfaceCriteria( interfaceCriteria );
+      this->m_Logger.Log(LogLevel::DBG,
+        "Finding component for '{0}': {1} component(s) satisfies 'AcceptingInterface' {2} and previous criteria.",
+        acceptingComponentName,
+        this->m_ComponentSelectorContainer[acceptingComponentName]->NumberOfComponents(),
+        this->m_Logger << interfaceCriteria );
 
       if( this->m_ComponentSelectorContainer[ acceptingComponentName ]->NumberOfComponents() == 0 )
       {
@@ -242,17 +243,17 @@ NetworkBuilder< ComponentList >::PropagateConnectionsWithUniqueComponents()
   {
     anySelectionNarrowed = false;
     auto nonUniqueComponentNames = this->GetNonUniqueComponentNames();
-    for( auto const & providingComponentName : nonUniqueComponentNames )
+    for( auto const & componentName : nonUniqueComponentNames )
     {
-      // check all components that accept from component "providingComponentName"
-      for( auto const & acceptingComponentName : this->m_Blueprint.GetOutputNames( providingComponentName ) )
+      // check all components that accept from component "componentName"
+      for( auto const & acceptingComponentName : this->m_Blueprint.GetOutputNames( componentName ) )
       {
         // if the accepting component is also not uniquely selected, we do not try to check all valid combinations, since this would make the handshake logic too complicated
         if( std::find( nonUniqueComponentNames.begin(), nonUniqueComponentNames.end(), acceptingComponentName ) == nonUniqueComponentNames.end() )
         {
-          BlueprintImpl::ParameterMapType          connectionProperties = this->m_Blueprint.GetConnection( providingComponentName, acceptingComponentName );
+          BlueprintImpl::ParameterMapType          connectionProperties = this->m_Blueprint.GetConnection( componentName, acceptingComponentName );