/// <summary>
/// Check the Attributes on the field and return a structure containing
/// the settings for this file.
/// </summary>
/// <param name="fi">Information about this field</param>
/// <param name="recordAttribute">Type of record we are reading</param>
/// <returns>Null if not used</returns>
public static FieldBase CreateField(FieldInfo fi, TypedRecordAttribute recordAttribute)
{
// If ignored, return null
#pragma warning disable 612,618 // disable obsole warning
if (fi.IsDefined(typeof(FieldNotInFileAttribute), true) || fi.IsDefined(typeof(FieldIgnoredAttribute), true))
#pragma warning restore 612,618
{
return(null);
}
FieldBase res = null;
var attributes = (FieldAttribute[])fi.GetCustomAttributes(typeof(FieldAttribute), true);
// CHECK USAGE ERRORS !!!
// Fixed length record and no attributes at all
if (recordAttribute is FixedLengthRecordAttribute && attributes.Length == 0)
{
throw new BadUsageException("The field: '" + fi.Name + "' must be marked the FieldFixedLength attribute because the record class is marked with FixedLengthRecord.");
}
if (attributes.Length > 1)
{
throw new BadUsageException("The field: '" + fi.Name + "' has a FieldFixedLength and a FieldDelimiter attribute.");
}
if (recordAttribute is DelimitedRecordAttribute && fi.IsDefined(typeof(FieldAlignAttribute), false))
{
throw new BadUsageException("The field: '" + fi.Name + "' can't be marked with FieldAlign attribute, it is only valid for fixed length records and are used only for write purpose.");
}
if (fi.FieldType.IsArray == false && fi.IsDefined(typeof(FieldArrayLengthAttribute), false))
{
throw new BadUsageException("The field: '" + fi.Name + "' can't be marked with FieldArrayLength attribute is only valid for array fields.");
}
// PROCESS IN NORMAL CONDITIONS
if (attributes.Length > 0)
{
FieldAttribute fieldAttb = attributes[0];
if (fieldAttb is FieldFixedLengthAttribute)
{
// Fixed Field
if (recordAttribute is DelimitedRecordAttribute)
{
throw new BadUsageException("The field: '" + fi.Name + "' can't be marked with FieldFixedLength attribute, it is only for the FixedLengthRecords not for delimited ones.");
}
var attbFixedLength = (FieldFixedLengthAttribute)fieldAttb;
var attbAlign = Attributes.GetFirst <FieldAlignAttribute>(fi);
res = new FixedLengthField(fi, attbFixedLength.Length, attbAlign);
((FixedLengthField)res).FixedMode = ((FixedLengthRecordAttribute)recordAttribute).FixedMode;
}
else if (fieldAttb is FieldDelimiterAttribute)
{
// Delimited Field
if (recordAttribute is FixedLengthRecordAttribute)
{
throw new BadUsageException("The field: '" + fi.Name + "' can't be marked with FieldDelimiter attribute, it is only for DelimitedRecords not for fixed ones.");
}
res = new DelimitedField(fi, ((FieldDelimiterAttribute)fieldAttb).Delimiter);
}
else
{
throw new BadUsageException("Custom field attributes are not currently supported. Unknown attribute: " + fieldAttb.GetType().Name + " on field: " + fi.Name);
}
}
else // attributes.Length == 0
{
var delimitedRecordAttribute = recordAttribute as DelimitedRecordAttribute;
if (delimitedRecordAttribute != null)
{
res = new DelimitedField(fi, delimitedRecordAttribute.Separator);
}
}
if (res != null)
{
// FieldDiscarded
res.Discarded = fi.IsDefined(typeof(FieldValueDiscardedAttribute), false);
// FieldTrim
Attributes.WorkWithFirst <FieldTrimAttribute>(fi, (x) =>
{
res.TrimMode = x.TrimMode;
res.TrimChars = x.TrimChars;
});
// FieldQuoted
Attributes.WorkWithFirst <FieldQuotedAttribute>(fi, (x) =>
{
if (res is FixedLengthField)
{
throw new BadUsageException(
"The field: '" + fi.Name +
"' can't be marked with FieldQuoted attribute, it is only for the delimited records.");
}
((DelimitedField)res).QuoteChar =
x.QuoteChar;
((DelimitedField)res).QuoteMode =
x.QuoteMode;
((DelimitedField)res).QuoteMultiline =
x.QuoteMultiline;
});
// FieldOrder
Attributes.WorkWithFirst <FieldOrderAttribute>(fi, x => res.FieldOrder = x.Order);
// FieldOptional
res.IsOptional = fi.IsDefined(typeof(FieldOptionalAttribute), false);
// FieldInNewLine
res.InNewLine = fi.IsDefined(typeof(FieldInNewLineAttribute), false);
// FieldArrayLength
if (fi.FieldType.IsArray)
{
res.IsArray = true;
res.ArrayType = fi.FieldType.GetElementType();
// MinValue indicates that there is no FieldArrayLength in the array
res.ArrayMinLength = int.MinValue;
res.ArrayMaxLength = int.MaxValue;
Attributes.WorkWithFirst <FieldArrayLengthAttribute>(fi, (x) =>
{
res.ArrayMinLength = x.mMinLength;
res.ArrayMaxLength = x.mMaxLength;
if (res.ArrayMaxLength < res.ArrayMinLength ||
res.ArrayMinLength < 0 ||
res.ArrayMaxLength <= 0)
{
throw new BadUsageException("The field: " + fi.Name + " has invalid length values in the [FieldArrayLength] attribute.");
}
});
}
// NullFieldOnError
res.NullFieldOnError = fi.IsDefined(typeof(FieldNullOnErrorAttribute), false);
}
if (fi.IsDefined(typeof(CompilerGeneratedAttribute), false))
{
if (fi.Name.EndsWith("__BackingField") && fi.Name.StartsWith("<") && fi.Name.Contains(">"))
{
res.FieldFriendlyName = fi.Name.Substring(1, fi.Name.IndexOf(">") - 1);
}
}
if (string.IsNullOrEmpty(res.FieldFriendlyName))
{
res.FieldFriendlyName = res.FieldName;
}
return(res);
}
/*
* private static readonly char[] mWhitespaceChars = new[] {
* '\t', '\n', '\v', '\f', '\r', ' ', '\x00a0', '\u2000', '\u2001', '\u2002', '\u2003', '\u2004', '\u2005',
* '\u2006', '\u2007', '\u2008',
* '\u2009', '\u200a', '\u200b', '\u3000', '\ufeff'
*/
#endregion
#region " CreateField "
/// <summary>
/// Check the Attributes on the field and return a structure containing
/// the settings for this file.
/// </summary>
/// <param name="fi">Information about this field</param>
/// <param name="recordAttribute">Type of record we are reading</param>
/// <returns>Null if not used</returns>
public static FieldBase CreateField(FieldInfo fi, TypedRecordAttribute recordAttribute)
{
FieldBase res = null;
MemberInfo mi = fi;
var memberName = "The field: '" + fi.Name;
Type fieldType = fi.FieldType;
string fieldFriendlyName = AutoPropertyName(fi);
if (string.IsNullOrEmpty(fieldFriendlyName) == false)
{
var prop = fi.DeclaringType.GetProperty(fieldFriendlyName);
if (prop != null)
{
memberName = "The property: '" + prop.Name;
mi = prop;
}
else
{
fieldFriendlyName = null;
}
}
// If ignored, return null
#pragma warning disable 612,618 // disable obsolete warning
if (mi.IsDefined(typeof(FieldNotInFileAttribute), true) ||
mi.IsDefined(typeof(FieldIgnoredAttribute), true) ||
mi.IsDefined(typeof(FieldHiddenAttribute), true))
#pragma warning restore 612,618
{
return(null);
}
var attributes = (FieldAttribute[])mi.GetCustomAttributes(typeof(FieldAttribute), true);
// CHECK USAGE ERRORS !!!
// Fixed length record and no attributes at all
if (recordAttribute is FixedLengthRecordAttribute &&
attributes.Length == 0)
{
throw new BadUsageException(memberName +
"' must be marked the FieldFixedLength attribute because the record class is marked with FixedLengthRecord.");
}
if (attributes.Length > 1)
{
throw new BadUsageException(memberName +
"' has a FieldFixedLength and a FieldDelimiter attribute.");
}
if (recordAttribute is DelimitedRecordAttribute &&
mi.IsDefined(typeof(FieldAlignAttribute), false))
{
throw new BadUsageException(memberName +
"' can't be marked with FieldAlign attribute, it is only valid for fixed length records and are used only for write purpose.");
}
if (fieldType.IsArray == false &&
mi.IsDefined(typeof(FieldArrayLengthAttribute), false))
{
throw new BadUsageException(memberName +
"' can't be marked with FieldArrayLength attribute is only valid for array fields.");
}
// PROCESS IN NORMAL CONDITIONS
if (attributes.Length > 0)
{
FieldAttribute fieldAttb = attributes[0];
if (fieldAttb is FieldFixedLengthAttribute)
{
// Fixed Field
if (recordAttribute is DelimitedRecordAttribute)
{
throw new BadUsageException(memberName +
"' can't be marked with FieldFixedLength attribute, it is only for the FixedLengthRecords not for delimited ones.");
}
var attbFixedLength = (FieldFixedLengthAttribute)fieldAttb;
var attbAlign = Attributes.GetFirst <FieldAlignAttribute>(mi);
res = new FixedLengthField(fi, attbFixedLength.Length, attbAlign);
((FixedLengthField)res).FixedMode = ((FixedLengthRecordAttribute)recordAttribute).FixedMode;
}
else if (fieldAttb is FieldDelimiterAttribute)
{
// Delimited Field
if (recordAttribute is FixedLengthRecordAttribute)
{
throw new BadUsageException(memberName +
"' can't be marked with FieldDelimiter attribute, it is only for DelimitedRecords not for fixed ones.");
}
res = new DelimitedField(fi, ((FieldDelimiterAttribute)fieldAttb).Delimiter);
}
else
{
throw new BadUsageException(
"Custom field attributes are not currently supported. Unknown attribute: " +
fieldAttb.GetType().Name + " on field: " + fi.Name);
}
}
else // attributes.Length == 0
{
var delimitedRecordAttribute = recordAttribute as DelimitedRecordAttribute;
if (delimitedRecordAttribute != null)
{
res = new DelimitedField(fi, delimitedRecordAttribute.Separator);
}
}
if (res != null)
{
// FieldDiscarded
res.Discarded = mi.IsDefined(typeof(FieldValueDiscardedAttribute), false);
// FieldTrim
Attributes.WorkWithFirst <FieldTrimAttribute>(mi,
(x) => {
res.TrimMode = x.TrimMode;
res.TrimChars = x.TrimChars;
});
// FieldQuoted
Attributes.WorkWithFirst <FieldQuotedAttribute>(mi,
(x) => {
if (res is FixedLengthField)
{
throw new BadUsageException(
memberName +
"' can't be marked with FieldQuoted attribute, it is only for the delimited records.");
}
((DelimitedField)res).QuoteChar =
x.QuoteChar;
((DelimitedField)res).QuoteMode =
x.QuoteMode;
((DelimitedField)res).QuoteMultiline =
x.QuoteMultiline;
});
// FieldOrder
Attributes.WorkWithFirst <FieldOrderAttribute>(mi, x => res.FieldOrder = x.Order);
// FieldCaption
Attributes.WorkWithFirst <FieldCaptionAttribute>(mi, x => res.FieldCaption = x.Caption);
// FieldOptional
res.IsOptional = mi.IsDefined(typeof(FieldOptionalAttribute), false);
// FieldInNewLine
res.InNewLine = mi.IsDefined(typeof(FieldInNewLineAttribute), false);
// FieldValidatorAttributes - for use in custom validation of fields
res.Validators = new List <Interfaces.IFieldValidate>((FieldValidateAttribute[])mi.GetCustomAttributes(typeof(FieldValidateAttribute), false));
// FieldArrayLength
if (fieldType.IsArray)
{
res.IsArray = true;
res.ArrayType = fieldType.GetElementType();
// MinValue indicates that there is no FieldArrayLength in the array
res.ArrayMinLength = int.MinValue;
res.ArrayMaxLength = int.MaxValue;
Attributes.WorkWithFirst <FieldArrayLengthAttribute>(mi,
(x) => {
res.ArrayMinLength = x.MinLength;
res.ArrayMaxLength = x.MaxLength;
if (res.ArrayMaxLength < res.ArrayMinLength ||
res.ArrayMinLength < 0 ||
res.ArrayMaxLength <= 0)
{
throw new BadUsageException(memberName +
" has invalid length values in the [FieldArrayLength] attribute.");
}
});
}
}
if (string.IsNullOrEmpty(res.FieldFriendlyName))
{
res.FieldFriendlyName = res.FieldName;
}
return(res);
}
