Esempio n. 1
0
const std::string&
Feature::eval( StringExpression& expr, FilterContext const* context ) const
{
    const StringExpression::Variables& vars = expr.variables();
    for( StringExpression::Variables::const_iterator i = vars.begin(); i != vars.end(); ++i )
    {
      std::string val = "";
      AttributeTable::const_iterator ai = _attrs.find(toLower(i->first));
      if (ai != _attrs.end())
      {
        val = ai->second.getString();
      }
      else if (context)
      {
        //No attr found, look for script
        ScriptEngine* engine = context->getSession()->getScriptEngine();
        if (engine)
        {
          ScriptResult result = engine->run(i->first, this, context);
          if (result.success())
            val = result.asString();
          else
            OE_WARN << LC << "Feature Script error on '" << expr.expr() << "': " << result.message() << std::endl;
        }
      }

      expr.set( *i, val );
    }

    return expr.eval();
}
Esempio n. 2
0
double
Feature::eval( NumericExpression& expr, FilterContext const* context ) const
{
    const NumericExpression::Variables& vars = expr.variables();
    for( NumericExpression::Variables::const_iterator i = vars.begin(); i != vars.end(); ++i )
    {
      double val = 0.0;
      AttributeTable::const_iterator ai = _attrs.find(toLower(i->first));
      if (ai != _attrs.end())
      {
        val = ai->second.getDouble(0.0);
      }
      else if (context)
      {
        //No attr found, look for script
        ScriptEngine* engine = context->getSession()->getScriptEngine();
        if (engine)
        {
          ScriptResult result = engine->run(i->first, this, context);
          if (result.success())
            val = result.asDouble();
          else {
              OE_WARN << LC << "Feature Script error on '" << expr.expr() << "': " << result.message() << std::endl;
          }
        }
      }

      expr.set( *i, val); //osgEarth::as<double>(getAttr(i->first),0.0) );
    }

    return expr.eval();
}