project2/variables-modparam.cpp


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#include "variables.h"
#include "xmlObjectLoader.h"
#include "xmlStorage.h"
#include "appEngine.h"

/// Variable implementation to access call parameters
class VariableParam : public VariableImplDyn {
	public:
		VariableParam(const xmlpp::Element * e) :
			VariableImplDyn(e),
			name(e->get_attribute_value("name"))
		{
		}
		VariableType value() const
		{
			try {
				return ApplicationEngine::getCurrent()->env()->getParamQuery(name);
			}
			catch (ParamNotFound) {
				if (!defaultValue) {
					throw;
				}
				return (*defaultValue)();
			}
		}
	private:
		const Glib::ustring name;
};
DECLARE_COMPONENT_LOADER("param", VariableParam, VariableLoader);