ExtendedModel.cc

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#include "CPPUtils.h"
#include "GeoTessModelExtended.h"
 
using namespace geotess;
 
/**
 * An example of how to implement an extension of a GeoTessModel.
 * The definition of the extended model is contained in files
 * GeoTessModelExtended.h and .cc.  This method instantiates
 * an instance of the model and queries it for the extra data.
 * <p>
 * The program takes one command line argument which specifies the
 * full path to the file GeoTessModels/crust20.geotess
 * that was delivered with the GeoTess package.
 */
int main(int argc, char** argv)
{
        try
        {
                string path;
                if(argc < 2)
                {
                        cout << "Must supply a single command line argument specifying path to the GeoTessModels directory" << endl;
                        return -1;
                }
 
                path = CPPUtils::insertPathSeparator(argv[1], "crust20.geotess");
 
                // load a regular GeoTessModel.  This is not the extended model.
                GeoTessModel* baseModel = new GeoTessModel(path);
 
                // construct an instance of a GeoTessModelExtended that
                // has MetaData, Grid and Profile information copied from
                // the base class.  The extra data accessible only from the
                // derived class is initialized in the constructor to "default value".
                GeoTessModelExtended extModel(baseModel);
 
                // all information has been copied from baseModel to extendedModel
                // so baseModel can be deleted.
                delete baseModel;
 
                // in this trivial example, the extended model implements a single
                // string called 'extraData'.  It is initialized to 'default value'
                // in the GeoTessModelExtended constructor.  A getter() and setter()
                // are implemented to allow applications to retrieve and modify the
                // value.  Likely, real classes that extend GeoTessModel
                // would involve more complicated structures.
 
                // print the extraData to the screen.  This is the default value
                // assigned by the GeoTessModelExtended constructor.
                cout << extModel.getExtraData() << endl;
 
                // change the extraData to a new string.
                extModel.setExtraData("modified value");
 
                // retrieve the modified value of extraData.
                cout << extModel.getExtraData() << endl;
 
                cout << "done." << endl;
 
        }
        catch (GeoTessException& ex)
        {
                cout << ex.emessage << endl;
                return 1;
        }
        catch(...)
        {
                cout << endl << "Unidentified error detected " << endl
                                <<  __FILE__ << "  " << __LINE__ << endl;
                return 2;
        }
 
        return 0;
}