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SqMod/modules/mysql/Field.hpp
Sandu Liviu Catalin 7dc20fcc0c Improve type conversion in the MySQL module. 
Implement field wrappers and field retrieval by name.
Various other fixes and adjustments.
2016-07-19 21:42:41 +03:00

368 lines
13 KiB
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#ifndef _SQMYSQL_FIELD_HPP_
#define _SQMYSQL_FIELD_HPP_
// ------------------------------------------------------------------------------------------------
#include "Handle/ResultSet.hpp"
// ------------------------------------------------------------------------------------------------
namespace SqMod {
/* ------------------------------------------------------------------------------------------------
* Used to manage and interact with fields from result-sets.
*/
class Field
{
// --------------------------------------------------------------------------------------------
friend class ResultSet;
private:
// --------------------------------------------------------------------------------------------
Uint32 m_Index; // The actual index of the referenced field.
ResRef m_Handle; // Reference to the actual database result-set.
protected:
/* --------------------------------------------------------------------------------------------
* Validate the associated result-set handle and field index, and throw an error if invalid.
*/
#if defined(_DEBUG) || defined(SQMOD_EXCEPTLOC)
void Validate(CCStr file, Int32 line) const;
#else
void Validate() const;
#endif // _DEBUG
/* --------------------------------------------------------------------------------------------
* Validate the associated result-set handle and field index, and throw an error if invalid.
*/
#if defined(_DEBUG) || defined(SQMOD_EXCEPTLOC)
void ValidateCreated(CCStr file, Int32 line) const;
#else
void ValidateCreated() const;
#endif // _DEBUG
/* --------------------------------------------------------------------------------------------
* Validate the associated result-set handle and field index, and throw an error if invalid.
*/
#if defined(_DEBUG) || defined(SQMOD_EXCEPTLOC)
const ResRef & GetValid(CCStr file, Int32 line) const;
#else
const ResRef & GetValid() const;
#endif // _DEBUG
/* --------------------------------------------------------------------------------------------
* Validate the associated result-set handle and field index, and throw an error if invalid.
*/
#if defined(_DEBUG) || defined(SQMOD_EXCEPTLOC)
const ResRef & GetCreated(CCStr file, Int32 line) const;
#else
const ResRef & GetCreated() const;
#endif // _DEBUG
/* --------------------------------------------------------------------------------------------
* Validate the associated result-set handle and field index, and throw an error if invalid.
*/
#if defined(_DEBUG) || defined(SQMOD_EXCEPTLOC)
void ValidateField(Uint32 idx, CCStr file, Int32 line) const;
#else
void ValidateField(Uint32 idx) const;
#endif // _DEBUG
/* --------------------------------------------------------------------------------------------
* Modify the index to the specified value.
*/
void SetIndex(Int32 idx)
{
SQMOD_VALIDATE_FIELD(*this, idx);
// Assign the new index
m_Index = idx;
}
/* --------------------------------------------------------------------------------------------
* Modify the index to the specified value.
*/
void SetIndex(CSStr name)
{
SetIndex(SQMOD_GET_CREATED(*this)->GetFieldIndex(name));
}
/* --------------------------------------------------------------------------------------------
* Modify the index to the specified value.
*/
void SetIndex(const Object & field);
public:
// --------------------------------------------------------------------------------------------
static const Uint32 INVALID_INDEX;
/* --------------------------------------------------------------------------------------------
* Default constructor (null).
*/
Field()
: m_Index(INVALID_INDEX), m_Handle()
{
/* ... */
}
/* --------------------------------------------------------------------------------------------
* No field constructor.
*/
Field(const ResRef & rset)
: m_Index(INVALID_INDEX), m_Handle(rset)
{
/* ... */
}
/* --------------------------------------------------------------------------------------------
* Index constructor.
*/
Field(const ResRef & rset, Uint32 idx)
: m_Index(idx), m_Handle(rset)
{
SQMOD_VALIDATE_FIELD(*this, m_Index);
}
/* --------------------------------------------------------------------------------------------
* Name constructor.
*/
Field(const ResRef & rset, CSStr name)
: m_Index(rset ? rset->GetFieldIndex(name) : -1), m_Handle(rset)
{
SQMOD_VALIDATE_FIELD(*this, m_Index);
}
/* --------------------------------------------------------------------------------------------
* Dynamic constructor.
*/
Field(const ResRef & rset, const Object & field)
: m_Index(INVALID_INDEX), m_Handle(rset)
{
if (!m_Handle)
{
STHROWF("Invalid MySQL result-set reference");
}
// Extract the index
SetIndex(field);
}
/* --------------------------------------------------------------------------------------------
* Copy constructor.
*/
Field(const Field & o) = default;
/* --------------------------------------------------------------------------------------------
* Move constructor.
*/
Field(Field && o) = default;
/* --------------------------------------------------------------------------------------------
* Copy assignment operator.
*/
Field & operator = (const Field & o) = default;
/* --------------------------------------------------------------------------------------------
* Move assignment operator.
*/
Field & operator = (Field && o) = default;
/* --------------------------------------------------------------------------------------------
* Perform an equality comparison between two result-set field indexes.
*/
bool operator == (const Field & o) const
{
return (m_Index == o.m_Index);
}
/* --------------------------------------------------------------------------------------------
* Perform an inequality comparison between two result-set field indexes.
*/
bool operator != (const Field & o) const
{
return (m_Index != o.m_Index);
}
/* --------------------------------------------------------------------------------------------
* Implicit conversion to boolean for use in boolean operations.
*/
operator bool () const
{
return (m_Handle && m_Handle->CheckFieldIndex(m_Index));
}
/* --------------------------------------------------------------------------------------------
* Used by the script engine to compare two instances of this type.
*/
Int32 Cmp(const Field & o) const
{
if (m_Index == o.m_Index)
{
return 0;
}
else if (m_Index > o.m_Index)
{
return 1;
}
else
{
return -1;
}
}
/* --------------------------------------------------------------------------------------------
* Used by the script engine to convert an instance of this type to a string.
*/
CSStr ToString() const
{
CSStr val = nullptr;
// Can we attempt to return the parameter name?
if (m_Handle && m_Handle->CheckFieldIndex(m_Index))
{
val = m_Handle->mFields[m_Index].name;
}
else
{
val = ToStrF(_SC("%d"), m_Index);
}
// Return the value if valid
return val ? val : _SC("");
}
/* --------------------------------------------------------------------------------------------
* Used by the script engine to retrieve the name from instances of this type.
*/
static SQInteger Typename(HSQUIRRELVM vm);
/* --------------------------------------------------------------------------------------------
* See whether the field is valid.
*/
bool IsValid() const
{
return m_Handle; // An invalid result-set means an invalid field
}
/* --------------------------------------------------------------------------------------------
* Return the number of active references to the associated result-set handle.
*/
Uint32 GetRefCount() const
{
return m_Handle.Count();
}
/* --------------------------------------------------------------------------------------------
* Retrieve the referenced field index.
*/
SQInteger GetIndex() const
{
return ConvTo< SQInteger >::From(m_Index);
}
/* --------------------------------------------------------------------------------------------
* Retrieve the referenced database statement.
*/
Object GetStatement() const;
/* --------------------------------------------------------------------------------------------
* Retrieve the referenced database connection.
*/
Object GetConnection() const;
/* --------------------------------------------------------------------------------------------
* Release the reference to the referenced database statement and field index.
*/
void Release()
{
m_Handle.Reset();
m_Index = INVALID_INDEX;
}
/* --------------------------------------------------------------------------------------------
* Retrieve the value inside the referenced field as a boolean value.
*/
bool GetBoolean() const;
/* --------------------------------------------------------------------------------------------
* Retrieve the value inside the referenced field as a character.
*/
SQChar GetChar() const;
/* --------------------------------------------------------------------------------------------
* Retrieve the value inside the referenced field as a native script integer.
*/
SQInteger GetInteger() const;
/* --------------------------------------------------------------------------------------------
* Retrieve the value inside the referenced field as a native script floating point.
*/
SQFloat GetFloat() const;
/* --------------------------------------------------------------------------------------------
* Retrieve the value inside the referenced field as a signed 8 bit integer value.
*/
SQInteger GetInt8() const;
/* --------------------------------------------------------------------------------------------
* Retrieve the value inside the referenced field as an unsigned 8 bit integer value.
*/
SQInteger GetUint8() const;
/* --------------------------------------------------------------------------------------------
* Retrieve the value inside the referenced field as a signed 16 bit integer value.
*/
SQInteger GetInt16() const;
/* --------------------------------------------------------------------------------------------
* Retrieve the value inside the referenced field as an unsigned 16 bit integer value.
*/
SQInteger GetUint16() const;
/* --------------------------------------------------------------------------------------------
* Retrieve the value inside the referenced field as a signed 32 bit integer value.
*/
SQInteger GetInt32() const;
/* --------------------------------------------------------------------------------------------
* Retrieve the value inside the referenced field as an unsigned 32 bit integer value.
*/
SQInteger GetUint32() const;
/* --------------------------------------------------------------------------------------------
* Retrieve the value inside the referenced field as a signed 64 bit integer value.
*/
Object GetInt64() const;
/* --------------------------------------------------------------------------------------------
* Retrieve the value inside the referenced field as an unsigned 64 bit integer value.
*/
Object GetUint64() const;
/* --------------------------------------------------------------------------------------------
* Retrieve the value inside the referenced field as a 32 bit floating point value.
*/
SQFloat GetFloat32() const;
/* --------------------------------------------------------------------------------------------
* Retrieve the value inside the referenced field as a 64 bit floating point value.
*/
SQFloat GetFloat64() const;
/* --------------------------------------------------------------------------------------------
* Retrieve the value inside the referenced field as a string value.
*/
Object GetString() const;
/* --------------------------------------------------------------------------------------------
* Retrieve the value inside the referenced field as a memory buffer.
*/
Object GetBuffer() const;
/* --------------------------------------------------------------------------------------------
* Retrieve the value inside the referenced field as a memory blob.
*/
Object GetBlob() const;
};
} // Namespace:: SqMod
#endif // _SQMYSQL_FIELD_HPP_
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