internal override IExp RemoveExpIfNull(ICaster caster)
{
if (_rOperand == null || _lOperand == null)
{
return(null);
}
if (_rOperand is Literal)
{
if (caster.IsNullPropertyValue(((Literal)_rOperand).Value))
{
return(null);
}
}
if (_lOperand is Literal)
{
if (caster.IsNullPropertyValue(((Literal)_lOperand).Value))
{
return(null);
}
}
return(this);
}
internal override IExp RemoveExpIfNull(ICaster caster)
{
List <IElement> newOperands = new List <IElement>();
for (int i = 0; i <= _operands.Length - 1; i++)
{
if (_operands[i] == null)
{
continue;
}
else if (_operands[i] is Literal &&
caster.IsNullPropertyValue(((Literal)_operands[i]).Value))
{
continue;
}
newOperands.Add(_operands[i]);
}
if (newOperands.Count == 0)
{
return(null);
}
return(new InExp(_lOperand, newOperands.ToArray()));
}
/// <summary>
/// 値がNULL表現値か否か判定する
/// </summary>
/// <param name="value">判定する値</param>
/// <returns></returns>
/// <remarks>SqlAccesssorDataSourceで利用します</remarks>
public bool IsNullPropertyValue(object value)
{
if (this.IsDisposed)
{
throw new InvalidOperationException("Dbオブジェクトは既に破棄されています");
}
return(_aCaster.IsNullPropertyValue(value));
}
internal override IExp RemoveExpIfNull(ICaster caster)
{
if (_fromOperand == null && _toOperand == null)
{
return(null);
}
else if (_fromOperand == null)
{
return(new LessThanOrEqual(_operand, _toOperand));
}
else if (_toOperand == null)
{
return(new GreaterThanOrEqual(_operand, _fromOperand));
}
else if (_fromOperand is Literal && _toOperand is Literal)
{
if (caster.IsNullPropertyValue(((Literal)_fromOperand).Value) &&
caster.IsNullPropertyValue(((Literal)_toOperand).Value))
{
return(null);
}
else if (caster.IsNullPropertyValue(((Literal)_fromOperand).Value))
{
return(new LessThanOrEqual(_operand, _toOperand));
}
else if (caster.IsNullPropertyValue(((Literal)_toOperand).Value))
{
return(new GreaterThanOrEqual(_operand, _fromOperand));
}
}
else if (_fromOperand is Literal && _toOperand is val)
{
if (caster.IsNullPropertyValue(((Literal)_fromOperand).Value))
{
return(new LessThanOrEqual(_operand, _toOperand));
}
}
else if (_fromOperand is val && _toOperand is Literal)
{
if (caster.IsNullPropertyValue(((Literal)_toOperand).Value))
{
return(new GreaterThanOrEqual(_operand, _fromOperand));
}
}
return(this);
}