apps/tutorials/vostut5client.cc

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/* Fifth VOS tutorial.  Introduction to Metaobjects.

   This tutorial file covers:
   - Accessing remote metaobjects

   This file (vostut5client.cc) is released into the public domain.  No
   restrictions are placed on its use, distribution or inclusion into
   other works.
*/

// You must run this program after running vostut5server.

#include <vos/corelibs/vos/vos.hh>
#include <vos/metaobjects/property/property.hh>

void listTypes(Vobject* vob);

int main(int argc, char** argv)
{
    cout << "VOS Tutorial 5 Client\n\n";

    LocalSocketSite localsite(&NoAccessControl::static_);
    localsite.setTimeoutOnSelect(-1);

    string siteurl;
    if(argc > 1) siteurl = argv[1];
    else siteurl = "vop://localhost:4231";

    Property::registerExtenders();

    // The purpose of this client part of vostut5 is simply to
    // demonstrate that the usage of meta_cast<> and the API for
    // Property are the same whether you accessing local or remote
    // vobjects.

    try {
        vRef<Vobject> position = Vobject::findObjectFromRoot(siteurl + "/planet/position");

        listTypes(&position);

        Property* positionproperty = MetaObject::meta_cast<Property*>(&position);

        cout << "vostut5client: The property value of " << positionproperty->getURL().getString()
             << " is now " << positionproperty->read() << endl;

    } catch(runtime_error& e) {
        cout << "Error!  " << e.what() << "\n";
    }
}

void listTypes(Vobject* vob)
{
    // The type set is returned as an STL set<string>.  Simply use
    // standard iterators to iterate over the set.

    const Vobject::TypeSet& types = vob->getTypes();

    cout << "Types for " << vob->getURL().getString() << ": ";
    for(Vobject::TypeSet::const_iterator i = types.begin(); i != types.end(); i++)
    {
        if(i != types.begin()) cout << ", ";
        cout << (*i);
    }
    cout << "\n";
}

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