public DatabaseNotExpression(DatabaseExpression expression)
{
if (expression.sqlOperator != null)
{
throw new ArgumentException("expression has operator");
}
this.expression = expression;
}
/// <summary>
/// Get SQL string to search
/// </summary>
/// <param name="mode"></param>
/// <param name="reference"></param>
/// <returns></returns>
public IDatabaseExpression ToSql(CompareMode mode, object reference)
{
if (this.fullConverter != null)
{
return(this.fullConverter(reference, mode));
}
if (reference == null)
{
switch (mode)
{
case CompareMode.Equal:
case CompareMode.LessEqual:
case CompareMode.GreatEqual:
return(DatabaseExpression.IsNull(this.selector));
case CompareMode.NotEqual:
case CompareMode.Less:
case CompareMode.Great:
return(DatabaseExpression.IsNotNull(this.selector));
}
throw new ArgumentException();
}
if (this.converter == null)
{
if (this.IsComparable)
{
return(DatabaseExpression.Compare
(this.selector, mode, new DatabaseReference(reference.ToString())));
}
switch (mode)
{
case CompareMode.Equal:
case CompareMode.LessEqual:
case CompareMode.GreatEqual:
return(DatabaseExpression.AreEqual
(this.selector, new DatabaseReference(reference.ToString())));
case CompareMode.NotEqual:
case CompareMode.Less:
case CompareMode.Great:
return(DatabaseExpression.AreNotEqual
(this.selector, new DatabaseReference(reference.ToString())));
}
throw new ArgumentException();
}
var converted = this.converter(reference);
if (this.IsComparable)
{
return(DatabaseExpression.Compare(this.selector, mode, converted));
}
switch (mode)
{
case CompareMode.Equal:
case CompareMode.LessEqual:
case CompareMode.GreatEqual:
return(DatabaseExpression.Is(this.selector, converted));
case CompareMode.NotEqual:
case CompareMode.Less:
case CompareMode.Great:
return(DatabaseExpression.IsNot(this.selector, converted));
}
throw new ArgumentException();
}
public static IDatabaseExpression Not(DatabaseExpression expression) => new DatabaseNotExpression(expression);
