NullDataModel.h

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#ifndef NULLDATAMODEL_H_KN8TWG0V
#define NULLDATAMODEL_H_KN8TWG0V

#include "uscxml/config.h"
#include "uscxml/plugins/DataModelImpl.h"
#include <list>

#ifdef BUILD_AS_PLUGINS
#include "uscxml/plugins/Plugins.h"
#endif

namespace uscxml {
class Event;
class Data;
}

namespace uscxml {

class NullDataModel : public DataModelImpl {
public:
    NullDataModel();
    virtual ~NullDataModel();
    virtual std::shared_ptr<DataModelImpl> create(DataModelCallbacks* callbacks);

    virtual std::list<std::string> getNames() {
        std::list<std::string> names;
        names.push_back("null");
        return names;
    }

    virtual bool validate(const std::string& location, const std::string& schema) {
        return true;
    }
    virtual bool isValidSyntax(const std::string& expr) {
        return true; // overwrite when datamodel supports it
    }
    virtual void setEvent(const Event& event) {}

    size_t replaceExpressions(std::string& content) {
        return 0;
    }

    // foreach
    virtual uint32_t getLength(const std::string& expr) {
        return 0;
    }
    virtual void setForeach(const std::string& item,
                            const std::string& array,
                            const std::string& index,
                            uint32_t iteration) {}

    virtual Data getAsData(const std::string& content);

    virtual Data evalAsData(const std::string& content) {
        return getAsData(content);
    }
    virtual std::string evalAsString(const std::string& expr) {
        return expr;
    }

    virtual bool evalAsBool(const XERCESC_NS::DOMElement* scriptNode,
                            const std::string& expr);
    virtual bool evalAsBool(const std::string& expr) {
        return evalAsBool(NULL, expr);
    }

    virtual bool isDeclared(const std::string& expr) {
        return true;
    }

    virtual void assign(const std::string& location, const Data& data, const std::map<std::string, std::string>& attr) {}
    virtual void init(const std::string& location, const Data& data, const std::map<std::string, std::string>& attr) {}

    virtual void setCallbacks(DataModelCallbacks* callbacks) {
        _callbacks = callbacks;
    }

    virtual void addExtension(DataModelExtension* ext) {}

protected:

};

#ifdef BUILD_AS_PLUGINS
PLUMA_INHERIT_PROVIDER(NullDataModel, DataModelImpl)
#endif

}

#endif /* end of include guard: NULLDATAMODEL_H_KN8TWG0V */