/// <summary>
/// Constructs a new <see cref="IFilter{T}"/> from the include an omit configuration cards.
/// </summary>
/// <param name="include">the include configuration card</param>
/// <param name="omit">the omit configuration card</param>
/// <returns>the corresponding <see cref="IFilter{T}"/></returns>
public IFilter <byte[]> GetFilter(string include, string omit)
{
IFilter <byte[]> filter;
if (include != null && omit != null)
{
filter = new ConjunctionFilter <byte[]>
{
Filters = new List <IFilter <byte[]> >
{
ParseFilter(include), new NegationFilter <byte[]> {
Filter = ParseFilter(omit)
}
}
};
}
else if (include != null)
{
filter = ParseFilter(include);
}
else
{
filter = new NegationFilter <byte[]> {
Filter = ParseFilter(omit)
};
}
return(filter);
}
/// <summary>
/// Parses an <see cref="IFilter{T}"/>.
/// </summary>
/// <param name="lexer">the lexer to read the tokens from</param>
/// <param name="defaultFormat">the default format</param>
/// <returns>an <see cref="IFilter{T}"/></returns>
private IFilter <byte[]> ParseFilter(Lexer lexer, string defaultFormat)
{
IFilter <byte[]> filter = null;
if (lexer.MoveNext())
{
if (lexer.Current == OpeningPar)
{
filter = ParseFilter(lexer, defaultFormat);
lexer.Parse(ClosingPar);
}
else
{
string format1;
string format2;
var leftAccessor = ParseAccessor(lexer, defaultFormat, out format1);
var op = lexer.Parse();
var rightAccessor = ParseAccessor(lexer, defaultFormat, out format2);
var format = format1 ?? format2;
filter = GetFilter(leftAccessor, rightAccessor, format, op);
}
if (lexer.Current == Or)
{
var disjunction = new DisjunctionFilter <byte[]>
{
Filters = new List <IFilter <byte[]> >
{
filter, ParseFilter(lexer, defaultFormat)
}
};
filter = disjunction;
}
else if (lexer.Current == And)
{
var conjunction = new ConjunctionFilter <byte[]>
{
Filters = new List <IFilter <byte[]> >
{
filter, ParseFilter(lexer, defaultFormat)
}
};
filter = conjunction;
}
}
return(filter);
}
/// <summary>
/// Constructs a new <see cref="IFilter{T}"/> from the include an omit configuration cards.
/// </summary>
/// <param name="include">the include configuration card</param>
/// <param name="omit">the omit configuration card</param>
/// <returns>the corresponding <see cref="IFilter{T}"/></returns>
public IFilter<byte[]> GetFilter(string include, string omit)
{
IFilter<byte[]> filter;
if (include != null && omit != null)
{
filter = new ConjunctionFilter<byte[]>
{
Filters = new List<IFilter<byte[]>>
{
ParseFilter(include), new NegationFilter<byte[]> { Filter = ParseFilter(omit) }
}
};
}
else if (include != null)
{
filter = ParseFilter(include);
}
else
{
filter = new NegationFilter<byte[]> { Filter = ParseFilter(omit) };
}
return filter;
}
/// <summary>
/// Parses an <see cref="IFilter{T}"/>.
/// </summary>
/// <param name="lexer">the lexer to read the tokens from</param>
/// <param name="defaultFormat">the default format</param>
/// <returns>an <see cref="IFilter{T}"/></returns>
private IFilter<byte[]> ParseFilter(Lexer lexer, string defaultFormat)
{
IFilter<byte[]> filter = null;
if (lexer.MoveNext())
{
if (lexer.Current == OpeningPar)
{
filter = ParseFilter(lexer, defaultFormat);
lexer.Parse(ClosingPar);
}
else
{
string format1;
string format2;
var leftAccessor = ParseAccessor(lexer, defaultFormat, out format1);
var op = lexer.Parse();
var rightAccessor = ParseAccessor(lexer, defaultFormat, out format2);
var format = format1 ?? format2;
filter = GetFilter(leftAccessor, rightAccessor, format, op);
}
if (lexer.Current == Or)
{
var disjunction = new DisjunctionFilter<byte[]>
{
Filters = new List<IFilter<byte[]>>
{
filter, ParseFilter(lexer, defaultFormat)
}
};
filter = disjunction;
}
else if (lexer.Current == And)
{
var conjunction = new ConjunctionFilter<byte[]>
{
Filters = new List<IFilter<byte[]>>
{
filter, ParseFilter(lexer, defaultFormat)
}
};
filter = conjunction;
}
}
return filter;
}
