OpenSceneGraph/include/osgIntrospection/MethodInfo

#ifndef OSGINTROSPECTION_METHODINFO_
#define OSGINTROSPECTION_METHODINFO_

#include <osgIntrospection/Export>
#include <osgIntrospection/CustomAttributeProvider>
#include <osgIntrospection/Value>
#include <osgIntrospection/Exceptions>
#include <osgIntrospection/ParameterInfo>

#include <cstdarg>
#include <string>
#include <vector>

namespace osgIntrospection
{

	class Type;

	/// Class MethodInfo stores information about a class method. It is an
	/// abstract class, so it must be derived to provide the actual 
	/// implementation of isConst() and invoke(). Instances of this class
	/// can't be modified after their creation.
	class OSGINTROSPECTION_EXPORT MethodInfo: public CustomAttributeProvider
	{
	public:
		/// Direct initialization constructor.
		inline MethodInfo(const std::string &qname, const Type &decltype, const Type &rtype, const ParameterInfoList &plist);

		/// Returns the Type object associated to the type that
		/// declares the reflected method.
		inline virtual const Type &getDeclaringType() const;		

		/// Returns the name of the reflected method.
		inline virtual const std::string &getName() const;

		/// Returns the return type of the reflected method.
		inline const Type &getReturnType() const;

		/// Returns a list of objects that describe the reflected
		/// method's parameters.
		inline const ParameterInfoList &getParameters() const;

		/// Returns whether the reflected method is const or not.
		virtual bool isConst() const = 0;

		/// Invokes the reflected method dynamically on the given const
		/// instance, passing it the arguments as a list of Value objects.
		virtual Value invoke(const Value &instance, ValueList &args) const = 0;

		/// Invokes the reflected method dynamically on the given instance,
		/// passing it the arguments as a list of Value objects.
		virtual Value invoke(Value &instance, ValueList &args) const = 0;

		/// Invokes the reflected method dynamically on the given const
		/// instance, without arguments.
		inline Value invoke(const Value &instance) const;

		/// Invokes the reflected method dynamically on the given
		/// instance, without arguments.
		inline Value invoke(Value &instance) const;

	private:
		inline std::string strip_namespace(const std::string &s) const;

		virtual void getInheritedProviders(CustomAttributeProviderList &providers) const;

		std::string name_;
		const Type &decltype_;
		const Type &rtype_;		
		ParameterInfoList params_;
	};

	// INLINE METHODS
	
	inline MethodInfo::MethodInfo(const std::string &qname, const Type &decltype, const Type &rtype, const ParameterInfoList &plist)
	:	CustomAttributeProvider(),
		decltype_(decltype), 
		rtype_(rtype),
		params_(plist)
	{
		name_ = strip_namespace(qname);
	}

	inline std::string MethodInfo::strip_namespace(const std::string &s) const
	{
		std::string::size_type p = s.rfind("::");
		if (p != std::string::npos)
			return s.substr(p+2);
		return s;
	}

	inline const std::string &MethodInfo::getName() const
	{
		return name_;
	}

	inline const Type &MethodInfo::getDeclaringType() const
	{
		return decltype_;
	}

	inline const Type &MethodInfo::getReturnType() const
	{
		return rtype_;
	}

	inline const ParameterInfoList &MethodInfo::getParameters() const
	{
		return params_;
	}

	inline Value MethodInfo::invoke(const Value &instance) const
	{
		ValueList args;
		return invoke(instance, args);
	}

	inline Value MethodInfo::invoke(Value &instance) const
	{
		ValueList args;
		return invoke(instance, args);
	}

}

#endif