/// <summary>
/// Returns the text passed across unless <paramref name="resolver"/> is supplied, in which case
/// it is passed through the resolver. Null is returned if the resolver rejects the string.
/// </summary>
/// <param name="text"></param>
/// <param name="resolver"></param>
/// <returns></returns>
public static string ParseString(string text, TypeParserResolver resolver)
{
var parser = resolver?.StringParser;
return(parser == null
? text
: parser.TryParse(text, out var result)
? result
: null);
}
/// <summary>
/// Extracts a GUID from the text or null if no GUID could be extracted.
/// </summary>
/// <param name="text"></param>
/// <param name="resolver"></param>
/// <returns></returns>
public static Guid?ParseGuid(string text, TypeParserResolver resolver)
{
var parser = resolver?.GuidParser;
return(parser == null
? ParseGuid(text)
: parser.TryParse(text, out var result)
? result
: (Guid?)null);
}
/// <summary>
/// Extracts a bool from the text or null if no bool could be extracted.
/// </summary>
/// <param name="text"></param>
/// <param name="resolver"></param>
/// <returns></returns>
public static bool?ParseBool(string text, TypeParserResolver resolver)
{
var parser = resolver?.BoolParser;
return(parser == null
? ParseBool(text)
: parser.TryParse(text, out var result)
? result
: (bool?)null);
}
/// <summary>
/// Extracts a byte array from text with an optional type parser resolver.
/// </summary>
/// <param name="text"></param>
/// <param name="resolver"></param>
/// <returns></returns>
public static byte[] ParseByteArray(string text, TypeParserResolver resolver)
{
var parser = resolver?.ByteArrayParser;
return(parser == null
? ParseByteArray(text)
: parser.TryParse(text, out var result)
? result
: (byte[])null);
}
/// <summary>
/// Extracts a decimal floating point number from the text or null if no decimal could be extracted.
/// </summary>
/// <param name="text"></param>
/// <param name="resolver"></param>
/// <returns></returns>
public static decimal?ParseDecimal(string text, TypeParserResolver resolver)
{
var parser = resolver?.DecimalParser;
return(parser == null
? ParseDecimal(text)
: parser.TryParse(text, out var result)
? result
: (decimal?)null);
}
/// <summary>
/// Extracts a date time offset from the text or null if no date time offset could be extracted.
/// </summary>
/// <param name="text"></param>
/// <param name="resolver"></param>
/// <returns></returns>
public static DateTimeOffset?ParseDateTimeOffset(string text, TypeParserResolver resolver)
{
var parser = resolver?.DateTimeOffsetParser;
return(parser == null
? ParseDateTimeOffset(text)
: parser.TryParse(text, out var result)
? result
: (DateTimeOffset?)null);
}
/// <summary>
/// Extracts a floating point number from the text or null if no float could be extracted.
/// </summary>
/// <param name="text"></param>
/// <param name="resolver"></param>
/// <returns></returns>
public static float?ParseFloat(string text, TypeParserResolver resolver)
{
var parser = resolver?.FloatParser;
return(parser == null
? ParseFloat(text)
: parser.TryParse(text, out var result)
? result
: (float?)null);
}
/// <summary>
/// Extracts a double-precision floating point number from the text or null if no double could be extracted.
/// </summary>
/// <param name="text"></param>
/// <param name="resolver"></param>
/// <returns></returns>
public static double?ParseDouble(string text, TypeParserResolver resolver)
{
var parser = resolver?.DoubleParser;
return(parser == null
? ParseDouble(text)
: parser.TryParse(text, out var result)
? result
: (double?)null);
}
/// <summary>
/// Extracts an unsigned long from the text or null if no ulong could be extracted.
/// </summary>
/// <param name="value"></param>
/// <param name="resolver"></param>
/// <returns></returns>
public static UInt64?ParseUInt64(string text, TypeParserResolver resolver)
{
var parser = resolver?.UInt64Parser;
return(parser == null
? ParseUInt64(text)
: parser.TryParse(text, out var result)
? result
: (UInt64?)null);
}
/// <summary>
/// Extracts an integer from the text or null if no int could be extracted.
/// </summary>
/// <param name="value"></param>
/// <param name="resolver"></param>
/// <returns></returns>
public static Int32?ParseInt32(string text, TypeParserResolver resolver)
{
var parser = resolver?.Int32Parser;
return(parser == null
? ParseInt32(text)
: parser.TryParse(text, out var result)
? result
: (Int32?)null);
}
/// <summary>
/// Extracts a single character from the text or null if no char could be extracted.
/// </summary>
/// <param name="text"></param>
/// <param name="resolver"></param>
/// <returns></returns>
public static char?ParseChar(string text, TypeParserResolver resolver)
{
var parser = resolver?.CharParser;
return(parser == null
? ParseChar(text)
: parser.TryParse(text, out var result)
? result
: (char?)null);
}
/// <summary>
/// Adds the resolver passed across to the cache. Must be called within a lock.
/// </summary>
/// <param name="resolver"></param>
private static void AddToCache(TypeParserResolver resolver)
{
lock (_SyncLock) {
var copy = new TypeParserResolver[_Resolvers.Length + 1];
Array.Copy(_Resolvers, 0, copy, 0, _Resolvers.Length);
copy[copy.Length - 1] = resolver;
_Resolvers = copy;
}
}
/// <summary>
/// Returns an existing <see cref="TypeParserResolver"/> that has the exact same parsers
/// as those passed in or creates and returns a new resolver if no such parser exists.
/// </summary>
/// <param name="parsers"></param>
/// <returns></returns>
public static TypeParserResolver Find(params ITypeParser[] parsers)
{
parsers = parsers ?? new ITypeParser[0];
var result = FindInCache(parsers);
if (result == null)
{
lock (_SyncLock) {
result = FindInCache(parsers);
if (result == null)
{
result = new TypeParserResolver(parsers);
AddToCache(result);
}
}
}
return(result);
}
/// <summary>
/// Parses the <paramref name="text"/> into an object of type <paramref name="type"/>. If the
/// text cannot be parsed then null is returned.
/// </summary>
/// <param name="type"></param>
/// <param name="text"></param>
/// <param name="typeParserResolver"></param>
/// <returns></returns>
/// <remarks>
/// This should be faster than TypeDescriptor.GetConverter().ConvertFrom() for the stock types.
/// </remarks>
public static object ParseType(Type type, string text, TypeParserResolver typeParserResolver)
{
object result = null;
if (type == typeof(string))
{
result = typeParserResolver == null
? text
: ParseString(text, typeParserResolver);
}
else if (text != null)
{
if (type == typeof(bool) || type == typeof(bool?))
{
result = typeParserResolver == null
? ParseBool(text)
: ParseBool(text, typeParserResolver);
}
else if (type == typeof(byte) || type == typeof(byte?))
{
result = typeParserResolver == null
? ParseByte(text)
: ParseByte(text, typeParserResolver);
}
else if (type == typeof(char) || type == typeof(char?))
{
result = typeParserResolver == null
? ParseChar(text)
: ParseChar(text, typeParserResolver);
}
else if (type == typeof(Int16) || type == typeof(Int16?))
{
result = typeParserResolver == null
? ParseInt16(text)
: ParseInt16(text, typeParserResolver);
}
else if (type == typeof(UInt16) || type == typeof(UInt16?))
{
result = typeParserResolver == null
? ParseUInt16(text)
: ParseUInt16(text, typeParserResolver);
}
else if (type == typeof(Int32) || type == typeof(Int32?))
{
result = typeParserResolver == null
? ParseInt32(text)
: ParseInt32(text, typeParserResolver);
}
else if (type == typeof(UInt32) || type == typeof(UInt32?))
{
result = typeParserResolver == null
? ParseUInt32(text)
: ParseUInt32(text, typeParserResolver);
}
else if (type == typeof(Int64) || type == typeof(Int64?))
{
result = typeParserResolver == null
? ParseInt64(text)
: ParseInt64(text, typeParserResolver);
}
else if (type == typeof(UInt64) || type == typeof(UInt64?))
{
result = typeParserResolver == null
? ParseUInt64(text)
: ParseUInt64(text, typeParserResolver);
}
else if (type == typeof(float) || type == typeof(float?))
{
result = typeParserResolver == null
? ParseFloat(text)
: ParseFloat(text, typeParserResolver);
}
else if (type == typeof(double) || type == typeof(double?))
{
result = typeParserResolver == null
? ParseDouble(text)
: ParseDouble(text, typeParserResolver);
}
else if (type == typeof(decimal) || type == typeof(decimal?))
{
result = typeParserResolver == null
? ParseDecimal(text)
: ParseDecimal(text, typeParserResolver);
}
else if (type == typeof(DateTime) || type == typeof(DateTime?))
{
result = typeParserResolver == null
? ParseDateTime(text)
: ParseDateTime(text, typeParserResolver);
}
else if (type == typeof(DateTimeOffset) || type == typeof(DateTimeOffset?))
{
result = typeParserResolver == null
? ParseDateTimeOffset(text)
: ParseDateTimeOffset(text, typeParserResolver);
}
else if (type == typeof(Guid) || type == typeof(Guid?))
{
result = typeParserResolver == null
? ParseGuid(text)
: ParseGuid(text, typeParserResolver);
}
else if (type == typeof(byte[]))
{
result = typeParserResolver == null
? ParseByteArray(text)
: ParseByteArray(text, typeParserResolver);
}
}
return(result);
}
