SqMod/modules/mysql/ResultSet.hpp

#ifndef _SQMYSQL_RESULTSET_HPP_
#define _SQMYSQL_RESULTSET_HPP_

// ------------------------------------------------------------------------------------------------
#include "Handle/ResultSet.hpp"

// ------------------------------------------------------------------------------------------------
namespace SqMod {

/* ------------------------------------------------------------------------------------------------
 * Allows management and interaction with a result set handle.
*/
class ResultSet
{
private:

    // --------------------------------------------------------------------------------------------
    ResRef  m_Handle; // Reference to the actual database result-set.

protected:

    /* --------------------------------------------------------------------------------------------
     * Validate the managed statement handle 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 managed statement handle 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 managed statement handle 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 managed statement handle 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 statement reference and field index, and throw an error if they're invalid.
    */
#if defined(_DEBUG) || defined(SQMOD_EXCEPTLOC)
    void ValidateField(Int32 idx, CCStr file, Int32 line) const;
#else
    void ValidateField(Int32 idx) const;
#endif // _DEBUG

public:

    /* --------------------------------------------------------------------------------------------
     * Default constructor.
    */
    ResultSet()
        : m_Handle()
    {
        /* ... */
    }

    /* --------------------------------------------------------------------------------------------
     * Connection constructor.
    */
    ResultSet(const ConnRef & conn)
        : m_Handle(new ResHnd())
    {
        m_Handle->Create(conn);
    }

    /* --------------------------------------------------------------------------------------------
     * Statement constructor.
    */
    ResultSet(const StmtRef & stmt)
        : m_Handle(new ResHnd())
    {
        m_Handle->Create(stmt);
    }

    /* --------------------------------------------------------------------------------------------
     * Handle constructor.
    */
    ResultSet(const ResRef & hnd)
        : m_Handle(hnd)
    {
        /* ... */
    }

    /* --------------------------------------------------------------------------------------------
     * Copy constructor.
    */
    ResultSet(const ResultSet & o) = default;

    /* --------------------------------------------------------------------------------------------
     * Move constructor.
    */
    ResultSet(ResultSet && o) = default;

    /* --------------------------------------------------------------------------------------------
     * Destructor.
    */
    ~ResultSet() = default;

    /* --------------------------------------------------------------------------------------------
     * Copy assignment operator.
    */
    ResultSet & operator = (const ResultSet & o) = default;

    /* --------------------------------------------------------------------------------------------
     * Move assignment operator.
    */
    ResultSet & operator = (ResultSet && o) = default;

    /* --------------------------------------------------------------------------------------------
     * Used by the script engine to compare two instances of this type.
    */
    Int32 Cmp(const ResultSet & o) const
    {
        if (m_Handle.Get() == o.m_Handle.Get())
        {
            return 0;
        }
        else if (m_Handle.Get() > o.m_Handle.Get())
        {
            return 1;
        }
        else
        {
            return -1;
        }
    }

    /* --------------------------------------------------------------------------------------------
     * Used by the script engine to convert an instance of this type to a string.
    */
    CSStr ToString() const
    {
        // Do we have a valid handle?
        if (m_Handle)
        {
            ToStrF("%u", m_Handle->mFieldCount);
        }
        // Default to a negative value
        return _SC("-1");
    }

    /* --------------------------------------------------------------------------------------------
     * Used by the script engine to retrieve the name from instances of this type.
    */
    static SQInteger Typename(HSQUIRRELVM vm);

    /* --------------------------------------------------------------------------------------------
     * See whether the managed handle is valid.
    */
    bool IsValid() const
    {
        return m_Handle;
    }

    /* --------------------------------------------------------------------------------------------
     * Returns the current position of the row cursor for the last Next().
    */
    Object RowIndex() const
    {
        return MakeULongObj(SQMOD_GET_CREATED(*this)->RowIndex());
    }

    /* --------------------------------------------------------------------------------------------
     * Returns the number of rows in the result set.
    */
    Object RowCount() const
    {
        return MakeULongObj(SQMOD_GET_CREATED(*this)->RowCount());
    }

    /* --------------------------------------------------------------------------------------------
     * Retrieve the next row from the query.
    */
    bool Next() const
    {
        return SQMOD_GET_CREATED(*this)->Next();
    }

    /* --------------------------------------------------------------------------------------------
     * Seeks to an arbitrary row in a query result set.
    */
    bool SetRowIndex(SQInteger index) const
    {
        return SQMOD_GET_CREATED(*this)->SetRowIndex(ConvTo< Uint64 >::From(index));
    }

    /* --------------------------------------------------------------------------------------------
     * Seeks to an arbitrary row in a query result set.
    */
    bool SetLongRowIndex(Object & index) const
    {
        return SQMOD_GET_CREATED(*this)->SetRowIndex(FetchULongObjVal(index));
    }

    /* --------------------------------------------------------------------------------------------
     * Retrieve a signed 8 bit integer from a field.
    */
    SQInteger GetInt8(Uint32 idx) const;

    /* --------------------------------------------------------------------------------------------
     * Retrieve an unsigned 8 bit integer from a field.
    */
    SQInteger GetUint8(Uint32 idx) const;

    /* --------------------------------------------------------------------------------------------
     * Retrieve a signed 16 bit integer from a field.
    */
    SQInteger GetInt16(Uint32 idx) const;

    /* --------------------------------------------------------------------------------------------
     * Retrieve an unsigned 16 bit integer from a field.
    */
    SQInteger GetUint16(Uint32 idx) const;

    /* --------------------------------------------------------------------------------------------
     * Retrieve a signed 32 bit integer from a field.
    */
    SQInteger GetInt32(Uint32 idx) const;

    /* --------------------------------------------------------------------------------------------
     * Retrieve an unsigned 32 bit integer from a field.
    */
    SQInteger GetUint32(Uint32 idx) const;

    /* --------------------------------------------------------------------------------------------
     * Retrieve a signed 64 bit integer from a field.
    */
    Int64 GetInt64(Uint32 idx) const;

    /* --------------------------------------------------------------------------------------------
     * Retrieve an unsigned 64 bit integer from a field.
    */
    Uint64 GetUint64(Uint32 idx) const;

    /* --------------------------------------------------------------------------------------------
     * Retrieve a 32 bit floating point from a field.
    */
    SQFloat GetFloat32(Uint32 idx) const;

    /* --------------------------------------------------------------------------------------------
     * Retrieve a 64 bit floating point from a field.
    */
    SQFloat GetFloat64(Uint32 idx) const;

    /* --------------------------------------------------------------------------------------------
     * Retrieve a boolean from a field.
    */
    bool GetBoolean(Uint32 idx) const;

    /* --------------------------------------------------------------------------------------------
     * Retrieve a string from a field.
    */
    CSStr GetString(Uint32 idx) const;
};

} // Namespace:: SqMod

#endif // _SQMYSQL_RESULTSET_HPP_