+/// \class BuildPlugin_ValidatorBaseForVertex
+/// \ingroup Validators
+/// \brief A validator for selection of Vertex feature.
+class BuildPlugin_ValidatorBaseForVertex: public ModelAPI_AttributeValidator
+{
+public:
+ //! Returns true if attribute is ok.
+ //! \param[in] theAttribute the checked attribute.
+ //! \param[in] theArguments arguments of the attribute.
+ //! \param[out] theError error message.
+ virtual bool isValid(const AttributePtr& theAttribute,
+ const std::list<std::string>& theArguments,
+ Events_InfoMessage& theError) const;
+};
+
+ /// \class BuildPlugin_ValidatorExpression
+ /// \ingroup Validators
+ /// \brief Validator for the expression of parameter.
+class BuildPlugin_ValidatorExpressionInterpolation: public ModelAPI_AttributeValidator
+{
+public:
+ //! Returns true if attribute has a valid parameter expression.
+ //! \param theAttribute the checked attribute
+ //! \param theArguments arguments of the attribute
+ //! \param theError the error string message if validation fails
+ virtual bool isValid(const AttributePtr& theAttribute,
+ const std::list<std::string>& theArguments,
+ Events_InfoMessage& theError) const;
+};
+