OpenWalnut  1.4.0
WEEGChannelInfo.cpp
00001 //---------------------------------------------------------------------------
00002 //
00003 // Project: OpenWalnut ( http://www.openwalnut.org )
00004 //
00005 // Copyright 2009 OpenWalnut Community, BSV@Uni-Leipzig and CNCF@MPI-CBS
00006 // For more information see http://www.openwalnut.org/copying
00007 //
00008 // This file is part of OpenWalnut.
00009 //
00010 // OpenWalnut is free software: you can redistribute it and/or modify
00011 // it under the terms of the GNU Lesser General Public License as published by
00012 // the Free Software Foundation, either version 3 of the License, or
00013 // (at your option) any later version.
00014 //
00015 // OpenWalnut is distributed in the hope that it will be useful,
00016 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00018 // GNU Lesser General Public License for more details.
00019 //
00020 // You should have received a copy of the GNU Lesser General Public License
00021 // along with OpenWalnut. If not, see <http://www.gnu.org/licenses/>.
00022 //
00023 //---------------------------------------------------------------------------
00024 
00025 #include <cstddef>
00026 
00027 #include <sstream>
00028 #include <string>
00029 
00030 #include <boost/shared_ptr.hpp>
00031 
00032 #include "../common/exceptions/WOutOfBounds.h"
00033 #include "../common/math/linearAlgebra/WPosition.h"
00034 #include "WEEGPositionsLibrary.h"
00035 #include "WEEGChannelInfo.h"
00036 #include "exceptions/WDHException.h"
00037 #include "io/WPagerEEG.h"
00038 
00039 
00040 WEEGChannelInfo::WEEGChannelInfo( std::size_t channelID,
00041                                   boost::shared_ptr< WPagerEEG > pager,
00042                                   boost::shared_ptr< WEEGPositionsLibrary > positionsLibrary )
00043 {
00044     if( !pager )
00045     {
00046         throw WDHException( std::string( "Couldn't construct new EEG channel info: pager invalid" ) );
00047     }
00048 
00049     if( !positionsLibrary )
00050     {
00051         throw WDHException( std::string( "Couldn't construct new EEG channel info: positions library invalid" ) );
00052     }
00053 
00054     if( channelID >= pager->getNumberOfChannels() )
00055     {
00056         std::ostringstream stream;
00057         stream << "The EEG has no channel number " << channelID;
00058         throw WOutOfBounds( stream.str() );
00059     }
00060 
00061     m_unit = pager->getChannelUnit( channelID );
00062     m_label = pager->getChannelLabel( channelID );
00063 
00064     try
00065     {
00066         m_position = positionsLibrary->getPosition( m_label );
00067         m_hasPosition = true;
00068     }
00069     catch( const WOutOfBounds& )
00070     {
00071         m_hasPosition = false;
00072     }
00073 }
00074 
00075 std::string WEEGChannelInfo::getUnit() const
00076 {
00077     return m_unit;
00078 }
00079 
00080 std::string WEEGChannelInfo::getLabel() const
00081 {
00082     return m_label;
00083 }
00084 
00085 WPosition WEEGChannelInfo::getPosition() const throw( WDHException )
00086 {
00087     if( m_hasPosition )
00088     {
00089         return m_position;
00090     }
00091     else
00092     {
00093         throw WDHException( std::string( "The position of this electrode is unknown." ) );
00094     }
00095 }