private static ICondition?ReadBetweenCondition(IConditionKeyword operand, bool negated, IWordReader reader, List <string> messages)
{
var min = ReadNextKeyword(reader, messages);
if (min is null)
{
return(null);
}
if (!ReadExpectingNotBeTheEnd(reader, messages))
{
return(null);
}
if (reader.WordType != WordType.And)
{
messages.Add(string.Format(BetweenWithoutAnd, reader.Word));
return(null);
}
var max = ReadNextKeyword(reader, messages);
if (max is null)
{
return(null);
}
if (negated)
{
return(new NotBetweenCondition(operand, min, max));
}
return(new BetweenCondition(operand, min, max));
}
private static ICondition?ReadNullCondition(IConditionKeyword operand, IWordReader reader, List <string> messages)
{
if (!ReadExpectingNotBeTheEnd(reader, messages))
{
return(null);
}
if (reader.WordType == WordType.Null)
{
return(new IsNullCondition(operand));
}
if (reader.WordType != WordType.Not)
{
messages.Add(string.Format(InvalidTokenAfterIs, reader.Word));
return(null);
}
if (!ReadExpectingNotBeTheEnd(reader, messages))
{
return(null);
}
if (reader.WordType == WordType.Null)
{
return(new IsNotNullCondition(operand));
}
messages.Add(string.Format(InvalidTokenAfterIsNot, reader.Word));
return(null);
}
private static ICondition?ReadInCondition(IConditionKeyword operand, bool negated, IWordReader reader, List <string> messages)
{
if (!ReadExpectingNotBeTheEnd(reader, messages))
{
return(null);
}
if (reader.WordType != WordType.OpenParenthesys)
{
messages.Add(string.Format(InvalidTokenAfterIn, reader.Word));
return(null);
}
var values = new List <IConditionKeyword>();
IConditionKeyword?value;
for (; ;)
{
value = ReadNextKeyword(reader, messages);
if (value is null)
{
return(null);
}
values.Add(value);
if (!ReadExpectingNotBeTheEnd(reader, messages))
{
return(null);
}
if (reader.WordType == WordType.CloseParenthesys)
{
break;
}
if (reader.WordType != WordType.Comma)
{
messages.Add(string.Format(InvalidTokenAfterInValue, reader.Word));
return(null);
}
}
if (negated)
{
return(new NotInCondition(operand, values));
}
return(new InCondition(operand, values));
}
private static ICondition?ReadOperator(
IWordReader reader,
List <string> messages,
IConditionKeyword left,
Func <IConditionKeyword, IConditionKeyword, ICondition> factory
)
{
var right = ReadNextKeyword(reader, messages);
if (right is null)
{
return(null);
}
return(factory.Invoke(left, right));
}
private static ICondition?ReadNotOperator(
IWordReader reader,
List <string> messages,
IConditionKeyword left
)
{
if (!ReadExpectingNotBeTheEnd(reader, messages))
{
return(null);
}
if (reader.WordType == WordType.In)
{
return(ReadInCondition(left, true, reader, messages));
}
if (reader.WordType == WordType.Between)
{
return(ReadBetweenCondition(left, true, reader, messages));
}
messages.Add(string.Format(InvalidTokenAfterNot, reader.Word));
return(null);
}
public BetweenCondition(IConditionKeyword operand, IConditionKeyword min, IConditionKeyword max)
{
Operand = operand;
Min = min;
Max = max;
}
public ComparisonConditionBase(IConditionKeyword left, IConditionKeyword right)
{
Left = left;
Right = right;
}
public NotEqualsToCondition(IConditionKeyword left, IConditionKeyword right) : base(left, right)
{
}
public IsNotNullCondition(IConditionKeyword operand) => Operand = operand;
public InCondition(IConditionKeyword operand, IEnumerable <IConditionKeyword> values)
{
Operand = operand;
Values = values;
}
public GreaterThanCondition(IConditionKeyword left, IConditionKeyword right) : base(left, right)
{
}
public EqualOrLowerThanCondition(IConditionKeyword left, IConditionKeyword right) : base(left, right)
{
}