Source code

/******************************************************************************
 *
 * Copyright (c) 2009 Antillia.com TOSHIYUKI ARAI. ALL RIGHTS RESERVED.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer.
 *  
 * 2. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *
 *  COMTypeConverterr.h
 *
 *****************************************************************************/

// SOL9
// 2009/05/10
// 2012/09/12 Added toString method to return _bstr_t.

#pragma once

#include <sol/Object.h>


namespace SOL 
{

class COMTypeConverter :public Object {

public:
  /**
   * Constructor
   */
  COMTypeConverter()
  {
  }

public:
  /**
   * Convery a variant(_variant_t) to a string(_bstr_t)
   * by using ChangeType(VT_BSTR) method of _variant_t
   */
  //2015/12/15 Commented out the second parameter,
  _bstr_t toString(__in _variant_t& variant)//,
        //__in_opt const _bstr_t& NULLExpr="")
  {
    if (variant.vt == VT_NULL) {
      return _bstr_t("");
    } else {
      variant.ChangeType(VT_BSTR);
      return (_bstr_t)variant;
    }
  }

public:
  /**
   * Convery a variant(_variant_t) to a string(_bstr_t)
   * by using ChangeType(VT_BSTR) method of _variant_t
   */

  bool toString(__in _variant_t& variant,
        __out _bstr_t& string,
        __in_opt const _bstr_t& NULLExpr="")
  {
    bool rc = false;

    string = "";

    if (variant.vt == VT_NULL) {
        string = NULLExpr;
    } else {
      try {
        variant.ChangeType(VT_BSTR);
        string = (_bstr_t)variant;
        rc = true;
      } catch (...) {
        //printf("Maybe converion failed\n"); Ignore this IException
      }
    }
    return rc;
  }

public:
  /**
   * Convery a string(_bstr_t) to a _variant_t datetime
   * by using ChangeType(VT_DATE) method of _variant_t
   */

  bool toDateTime(__in _bstr_t& string,
        __out _variant_t& datetime)
  {
    bool rc = false;
    _variant_t variant = string; //VT_BSTR

    try {
      variant.ChangeType(VT_DATE);
      datetime = variant;
      rc = true;
    } catch (...) {
      //printf("Maybe converion failed\n"); Ignore this IException
    }
    return rc;
  }

public:
  /**
   * Convery a st(SYSTEMTIME) to a _variant_t datetime
   * by using Win32 API SystemTimeToVariantTime().
   */

  bool toDateTime(__in SYSTEMTIME& st, 
    __out _variant_t& datetime)
  {
    bool rc = false;
    VARIANT var;
    VariantInit(&var);
    var.vt = VT_DATE;
    if (SystemTimeToVariantTime(&st, &var.date)) {
      datetime = var;
      rc = true;  
    }
    return rc;
  }  
};


}