core/Common/DocxFormat/Source/Base/Nullable.h

#pragma once

#include "SmartPtr.h"
#include "../XML/XmlUtils.h"

// ÷òîáû íå ïèñàòü ìåãà êëàññû ñ ìåãà ïðèâåäåíèåì òèïîâ - 
// - íàïèøåì âñå ïî-ïðîñòîìó. Çàòî áóäåò âñå ìàêñèìàëüíî áûñòðî è 
// êîìïèëèòüñÿ 3 ÷àñà íå áóäåò

namespace NSCommon
{
	template<typename Type>
	class nullable_base
	{
	protected:
		Type* m_pPointer;

	public:
		nullable_base()
		{
			m_pPointer = NULL;
		}
		nullable_base(const nullable_base<Type>& oOther)
		{
			m_pPointer = NULL;
			if ( NULL != oOther.m_pPointer )
				m_pPointer = new Type( (const Type&)*(oOther.m_pPointer) );
		}
		virtual ~nullable_base()
		{
			RELEASEOBJECT(m_pPointer);
		}

	public:
		AVSINLINE Type& operator*()  { return *m_pPointer; }
		AVSINLINE Type* operator->() { return  m_pPointer; }

		AVSINLINE Type& operator*() const  { return *m_pPointer; }
		AVSINLINE Type* operator->() const { return  m_pPointer; }

		AVSINLINE const Type& get()const { return  *m_pPointer; } 
		AVSINLINE Type& get() { return  *m_pPointer; }

	public:
		nullable_base<Type>& operator=(const nullable_base<Type> &oOther)
		{
			RELEASEOBJECT(m_pPointer);

			if ( NULL != oOther.m_pPointer )
				m_pPointer = new Type( (const Type&)*(oOther.m_pPointer) );

			return *this;
		}
		nullable_base<Type>& operator=(Type* pType)
		{
			RELEASEOBJECT(m_pPointer);
			m_pPointer	= pType;
			return *this;
		}
		nullable_base<Type>& operator=(const Type& oSrc)
		{
			RELEASEOBJECT(m_pPointer);
			m_pPointer	= new Type(oSrc);
			return *this;
		}

	public:
		AVSINLINE bool IsInit() const
		{ 
			return (NULL != m_pPointer); 
		}
		AVSINLINE bool is_init() const
		{
			return IsInit();
		}

		AVSINLINE void reset(Type* pType = NULL)
		{
			RELEASEOBJECT(m_pPointer);
			m_pPointer = pType;
		}
	};

	template<typename Type> 
	class nullable : public nullable_base<Type>
	{
	public:
		nullable() : nullable_base<Type>()
		{
		}
		nullable(const nullable<Type>& oOther)
		{
			if ( NULL == oOther.m_pPointer )
				m_pPointer = NULL;
			else
				m_pPointer = new Type( (const Type&)*(oOther.m_pPointer) );
		}

		AVSINLINE void operator=(XmlUtils::CXmlNode& oNode)
		{
			RELEASEOBJECT(m_pPointer);
			if (oNode.IsValid())
				m_pPointer = new Type(oNode);
		}
	#ifdef _USE_XMLLITE_READER_
		AVSINLINE void operator=(XmlUtils::CXmlLiteReader& oReader)
		{
			RELEASEOBJECT(m_pPointer);
			if (oReader.IsValid())
				m_pPointer = new Type(oReader);
		}
	#endif
		AVSINLINE void operator=(const wchar_t* &cwsValue)
		{
			RELEASEOBJECT(m_pPointer);
			if (NULL != cwsValue)
				m_pPointer = new Type( cwsValue );
		}
		AVSINLINE void operator=(const BSTR &value)
		{
			RELEASEOBJECT(m_pPointer);
			if (NULL != value)
				m_pPointer = new Type( value );
		}

		nullable<Type>& operator=(const nullable<Type> &oOther)
		{
			RELEASEOBJECT(m_pPointer);

			if ( NULL != oOther.m_pPointer )
				m_pPointer = new Type( (const Type&)*(oOther.m_pPointer) );

			return *this;
		}
		nullable<Type>& operator=(Type* pType)
		{
			RELEASEOBJECT(m_pPointer);
			m_pPointer	= pType;
			return *this;
		}
		nullable<Type>& operator=(const Type& oSrc)
		{
			RELEASEOBJECT(m_pPointer);
			m_pPointer	= new Type(oSrc);
			return *this;
		}

		const bool operator==(const nullable<Type>& oOther) const
		{
			if ( !m_pPointer && !oOther.m_pPointer )
				return true;
			else if ( !m_pPointer || !oOther.m_pPointer )
				return false;

			return (*m_pPointer) == (*(oOther.m_pPointer));
		}

		const bool operator==(const Type& oOther) const
		{
			if ( !m_pPointer )
				return false;

			return (*m_pPointer) == oOther;
		}

		AVSINLINE Type& operator*()  { return *m_pPointer; }
		AVSINLINE Type* operator->() { return  m_pPointer; }

		AVSINLINE Type& operator*() const  { return *m_pPointer; }
		AVSINLINE Type* operator->() const { return  m_pPointer; }

		AVSINLINE const Type& get()const { return  *m_pPointer; } 
		AVSINLINE Type& get2()const { return  *m_pPointer; } 

		template<class T> const bool is()const
		{
			if (NULL == m_pPointer)
				return false;
			T* pResult = dynamic_cast<T*>(const_cast<Type*>(m_pPointer));
			return (NULL != pResult);
		}
		template<class T> const T& as()const
		{
			T* pResult = dynamic_cast<T*>(const_cast<Type*>(m_pPointer));
			return *pResult;
		}
		template<class T> T& as()
		{
			T* pResult = dynamic_cast<T*>(const_cast<Type*>(m_pPointer));
			return *pResult;
		}

		AVSINLINE bool Init()
		{
			RELEASEOBJECT(m_pPointer);

			m_pPointer = new Type;

			return IsInit();
		}
		Type* GetPointer() const
		{
			return m_pPointer; 
		}
		//GetPointerEmptyNullable - íåáåçîïàñíàÿ îïåðàöèÿ, èñïîëüçîâàòü ïðè êðàéíåé íåîáõîäèìîñòè
		//Ïåðåäàåò óêàçàòåëü è î÷èùàåò nullable, â äàëüíåéøåì ïàìÿòü íàäî óäàëÿòü ñàìîñòîÿòåëüíî
		Type* GetPointerEmptyNullable()
		{
			Type* pOldPointer = m_pPointer;
			m_pPointer = NULL;
			return pOldPointer; 
		}
	};

	template<typename Type> 
	class nullable_limit : public nullable_base<Type>
	{
	public:
		nullable_limit() : nullable_base<Type>()
		{
		}

	public:

		AVSINLINE void operator=(const CString& value)
		{
			RELEASEOBJECT(m_pPointer);
			m_pPointer = new Type();
			m_pPointer->_set(value);
		}
		AVSINLINE void operator=(Type* pType)
		{
			RELEASEOBJECT(m_pPointer);
			m_pPointer	= pType;
		}
		AVSINLINE void operator=(const BSTR& value)
		{
			RELEASEOBJECT(m_pPointer);
			if (NULL != value)
			{
				m_pPointer = new Type();
				m_pPointer->_set((CString)value);
			}
		}
		AVSINLINE void operator=(const BYTE& value)
		{
			RELEASEOBJECT(m_pPointer);
			m_pPointer = new Type();
			m_pPointer->SetBYTECode(value);			
		}

		AVSINLINE void operator=(const Type& value)
		{
			*this = value.get();
		}

		nullable_limit<Type>& operator=(const nullable_limit<Type>& oSrc)
		{
			RELEASEOBJECT(m_pPointer);

			if ( NULL != oSrc.m_pPointer )
			{
				m_pPointer = new Type();
				m_pPointer->set(oSrc->get());
			}

			return *this;
		}

		AVSINLINE const CString& get_value_or(const CString& value) const
		{
			if (NULL == m_pPointer)
				return value;
			return m_pPointer->get();
		}
		AVSINLINE const CString& get_value() const
		{
			return m_pPointer->get();
		}

	public:
		AVSINLINE Type& operator*()  { return *m_pPointer; }
		AVSINLINE Type* operator->() { return  m_pPointer; }

		AVSINLINE Type& operator*() const  { return *m_pPointer; }
		AVSINLINE Type* operator->() const { return  m_pPointer; }

		AVSINLINE const Type& get()const { return  *m_pPointer; } 
	};

	class nullable_int : public nullable_base<int>
	{
	public:
		nullable_int() : nullable_base<int>()
		{
		}

		AVSINLINE void normalize(const int& min, const int& max)
		{
			if (IsInit())
			{
				if (*m_pPointer < min)
					*m_pPointer = min;
				else if (*m_pPointer > max)
					*m_pPointer = max;
			}
		}
		AVSINLINE void normalize_positive()
		{
			if (IsInit())
			{
				if (*m_pPointer < 0)
					*m_pPointer = 0;
			}
		}

		AVSINLINE void operator=(const BSTR& value)
		{
			RELEASEOBJECT(m_pPointer);
			
			if (NULL != value)
				m_pPointer = new int(XmlUtils::GetInteger(value));
		}
		AVSINLINE void operator=(const CString& value)
		{
			RELEASEOBJECT(m_pPointer);
			m_pPointer = new int(XmlUtils::GetInteger(value));
		}
		AVSINLINE void operator=(const int& value)
		{
			RELEASEOBJECT(m_pPointer);
			m_pPointer = new int(value);
		}

		nullable_int& operator=(const nullable_int& oSrc)
		{
			RELEASEOBJECT(m_pPointer);

			if (NULL != oSrc.m_pPointer )
				m_pPointer = new int(*oSrc);
			return *this;
		}

		AVSINLINE int get_value_or(const int& value) const
		{
			if (NULL == m_pPointer)
			{
				int ret = value;
				return ret;
			}
			return *m_pPointer;
		}

	public:
		AVSINLINE int& operator*()  { return *m_pPointer; }
		AVSINLINE int* operator->() { return  m_pPointer; }

		AVSINLINE int& operator*() const  { return *m_pPointer; }
		AVSINLINE int* operator->() const { return  m_pPointer; }

		AVSINLINE const int& get()const { return  *m_pPointer; }
	public:
		AVSINLINE CString toString() const
		{
			CString result;
			//if (IsInit())
			//	result.Format(_T("%d"), get());

			return result;
		}
	};
	class nullable_sizet : public nullable_base<size_t>
	{
	public:
		nullable_sizet() : nullable_base<size_t>()
		{
		}

		AVSINLINE void normalize(const size_t& max)
		{
			if (IsInit())
			{
				if (*m_pPointer > max)
					*m_pPointer = max;
			}
		}

		AVSINLINE void operator=(const BSTR& value)
		{
			RELEASEOBJECT(m_pPointer);
			if (NULL != value)
				m_pPointer = new size_t(XmlUtils::GetUInteger(value));
		}
		AVSINLINE void operator=(const size_t& value)
		{
			RELEASEOBJECT(m_pPointer);
			m_pPointer = new size_t(value);
		}

		nullable_sizet& operator=(const nullable_sizet& oSrc)
		{
			RELEASEOBJECT(m_pPointer);

			if ( NULL != oSrc.m_pPointer )
				m_pPointer = new size_t(*oSrc);

			return *this;
		}

		AVSINLINE size_t get_value_or(const size_t& value) const
		{
			if (NULL == m_pPointer)
			{
				size_t ret = value;
				return ret;
			}
			return *m_pPointer;
		}
	public:
		AVSINLINE size_t& operator*()  { return *m_pPointer; }
		AVSINLINE size_t* operator->() { return  m_pPointer; }

		AVSINLINE size_t& operator*() const  { return *m_pPointer; }
		AVSINLINE size_t* operator->() const { return  m_pPointer; }

		AVSINLINE const size_t& get()const { return  *m_pPointer; } 
	};
	class nullable_double : public nullable_base<double>
	{
	public:
		nullable_double() : nullable_base<double>()
		{
		}

		AVSINLINE void normalize(const double& min, const double& max)
		{
			if (IsInit())
			{
				if (*m_pPointer < min)
					*m_pPointer = min;
				else if (*m_pPointer > max)
					*m_pPointer = max;
			}
		}

		AVSINLINE void operator=(const BSTR& value)
		{
			RELEASEOBJECT(m_pPointer);
			if (NULL != value)
				m_pPointer = new double(XmlUtils::GetDouble(value));
		}
		AVSINLINE void operator=(const double& value)
		{
			RELEASEOBJECT(m_pPointer);
			m_pPointer = new double(value);
		}

		nullable_double& operator=(const nullable_double& oSrc)
		{
			RELEASEOBJECT(m_pPointer);

			if ( NULL != oSrc.m_pPointer )
				m_pPointer = new double(*oSrc);

			return *this;
		}

		AVSINLINE double get_value_or(const double& value) const
		{
			if (NULL == m_pPointer)
			{
				double ret = value;
				return ret;
			}
			return *m_pPointer;
		}

	public:
		AVSINLINE double& operator*()  { return *m_pPointer; }
		AVSINLINE double* operator->() { return  m_pPointer; }

		AVSINLINE double& operator*() const  { return *m_pPointer; }
		AVSINLINE double* operator->() const { return  m_pPointer; }

		AVSINLINE const double& get()const { return  *m_pPointer; } 
	};
	class nullable_bool : public nullable_base<bool>
	{
	public:
		nullable_bool() : nullable_base<bool>()
		{
		}
	protected:
		bool set(const CString& value)
		{
			if ((_T("true") == value) || (_T("1") == value))
				return true;
			return false;
		}
	public:

		AVSINLINE void operator=(const BSTR& value)
		{
			RELEASEOBJECT(m_pPointer);
			if (NULL != value)
				m_pPointer = new bool(set((CString)value));
		}
		AVSINLINE void operator=(const bool& value)
		{
			RELEASEOBJECT(m_pPointer);
			m_pPointer = new bool(value);
		}

		nullable_bool& operator=(const nullable_bool& oSrc)
		{
			RELEASEOBJECT(m_pPointer);

			if ( NULL != oSrc.m_pPointer )
				m_pPointer = new bool(*oSrc);

			return *this;
		}

		AVSINLINE bool get_value_or(const bool& value) const
		{
			if (NULL == m_pPointer)
			{
				bool ret = value;
				return ret;
			}
			return *m_pPointer;
		}

	public:
		AVSINLINE bool& operator*()  { return *m_pPointer; }
		AVSINLINE bool* operator->() { return  m_pPointer; }

		AVSINLINE bool& operator*() const  { return *m_pPointer; }
		AVSINLINE bool* operator->() const { return  m_pPointer; }

		AVSINLINE const bool& get()const { return  *m_pPointer; } 
	public:
		AVSINLINE CString toString() const
		{
			CString result;
			//if (IsInit())
			//	result =  get() ? _T("true") : _T("false");

			return result;
		}
	};
	class nullable_string : public nullable_base<CString>
	{
	public:
		nullable_string() : nullable_base<CString>()
		{
		}
		nullable_string(const nullable_string& oOther)
		{
			if ( NULL == oOther.m_pPointer )
				m_pPointer = NULL;
			else
				m_pPointer	= new CString( *oOther.m_pPointer );
		}

		AVSINLINE void operator=(const BSTR& value)
		{
			RELEASEOBJECT(m_pPointer);
			if (NULL != value)
				m_pPointer = new CString(value);
		}
		AVSINLINE void operator=(const CString& value)
		{
			RELEASEOBJECT(m_pPointer);
			m_pPointer = new CString(value);
			
		}
		AVSINLINE void operator=(CString* value)
		{
			RELEASEOBJECT(m_pPointer);
			m_pPointer = value;
		}
		nullable_string& operator=(const nullable_string& oSrc)
		{
			RELEASEOBJECT(m_pPointer);

			if ( NULL != oSrc.m_pPointer )
				m_pPointer = new CString(*oSrc);
			return *this;
		}

		AVSINLINE CString get_value_or(const CString& value) const
		{
			if (NULL == m_pPointer)
			{
				CString ret = value;
				return ret;
			}
			return *m_pPointer;
		}

	public:
		AVSINLINE CString& operator*()  { return *m_pPointer; }
		AVSINLINE CString* operator->() { return  m_pPointer; }

		AVSINLINE CString& operator*() const  { return *m_pPointer; }
		AVSINLINE CString* operator->() const { return  m_pPointer; }

		AVSINLINE CString& get()const { return  *m_pPointer; } 
	};
}