Plugin.cpp

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#include "Plugin.h"

#include <ostream>

#include <QCoreApplication>
#include <QLibrary>
#include <QStringList>

#include "FileName.h"
#include "IException.h"

using namespace std;

namespace Isis {
  Plugin::Plugin() : Pvl() {
  }

  QFunctionPointer Plugin::GetPlugin(const QString &group) {
    // Get the library and plugin to load
    PvlGroup &g = findGroup(group);
    QString library = g["Library"];

    QString path = "./";
    Isis::FileName libraryFile(path + library);

    QString pluginName = g["Routine"];

    // Open the library, resolve the routine name, and return the function
    // address. The function will stay in memory until the application exists
    // so the scope of lib does not matter.
    QLibrary lib(libraryFile.expanded());
    bool loadedOk = lib.load();

    if(!loadedOk) {
      path = "$ISISROOT/lib/";
      libraryFile = path + library;
    }

    lib.setFileName(libraryFile.expanded());

    QFunctionPointer plugin = lib.resolve(pluginName.toLatin1().data());
    if (plugin == 0) {
      QString msg = "Unable to find plugin [" + pluginName +
                    "] in shared library [" + lib.fileName() + "]";
      throw IException(IException::Unknown, msg, _FILEINFO_);
    }

    return plugin;
  }
} // end namespace isis