/// <summary>
/// Create a field base from a fieldinfo object
/// Verify the settings against the actual field to ensure it will work.
/// </summary>
/// <param name="fi">Field Info Object</param>
internal FieldBase(FieldInfo fi)
: this()
{
FieldInfo = fi;
FieldType = FieldInfo.FieldType;
if (FieldType.IsArray)
{
FieldTypeInternal = FieldType.GetElementType();
}
else
{
FieldTypeInternal = FieldType;
}
IsStringField = FieldTypeInternal == typeof(string);
object[] attribs = fi.GetCustomAttributes(typeof(FieldConverterAttribute), true);
if (attribs.Length > 0)
{
var conv = (FieldConverterAttribute)attribs[0];
this.Converter = conv.Converter;
conv.ValidateTypes(FieldInfo);
}
else
{
this.Converter = ConvertHelpers.GetDefaultConverter(fi.Name, FieldType);
}
if (this.Converter != null)
{
this.Converter.mDestinationType = FieldTypeInternal;
}
attribs = fi.GetCustomAttributes(typeof(FieldNullValueAttribute), true);
if (attribs.Length > 0)
{
NullValue = ((FieldNullValueAttribute)attribs[0]).NullValue;
// mNullValueOnWrite = ((FieldNullValueAttribute) attribs[0]).NullValueOnWrite;
if (NullValue != null)
{
if (!FieldTypeInternal.IsAssignableFrom(NullValue.GetType()))
{
throw new BadUsageException("The NullValue is of type: " + NullValue.GetType().Name +
" that is not asignable to the field " + FieldInfo.Name +
" of type: " +
FieldTypeInternal.Name);
}
}
}
IsNullableType = FieldTypeInternal.IsValueType &&
FieldTypeInternal.IsGenericType &&
FieldTypeInternal.GetGenericTypeDefinition() == typeof(Nullable <>);
}
/// <summary>
/// Create a field base from a fieldinfo object
/// Verify the settings against the actual field to ensure it will work.
/// </summary>
/// <param name="fi">Field Info Object</param>
internal FieldBase(FieldInfo fi)
{
IsNullableType = false;
TrimMode = TrimMode.None;
FieldOrder = null;
InNewLine = false;
NextIsOptional = false;
IsOptional = false;
TrimChars = null;
NullValue = null;
TrailingArray = false;
IsLast = false;
IsFirst = false;
IsArray = false;
CharsToDiscard = 0;
FieldInfo = fi;
FieldType = FieldInfo.FieldType;
NullFieldOnError = false;
if (FieldType.IsArray)
{
FieldTypeInternal = FieldType.GetElementType();
}
else
{
FieldTypeInternal = FieldType;
}
IsStringField = FieldTypeInternal == typeof(string);
object[] attribs = fi.GetCustomAttributes(typeof(FieldConverterAttribute), true);
if (attribs.Length > 0)
{
var conv = (FieldConverterAttribute)attribs[0];
this.Converter = conv.Converter;
conv.ValidateTypes(FieldInfo);
}
else
{
this.Converter = ConvertHelpers.GetDefaultConverter(fi.Name, FieldType);
}
if (this.Converter != null)
{
this.Converter.mDestinationType = FieldTypeInternal;
}
attribs = fi.GetCustomAttributes(typeof(FieldNullValueAttribute), true);
if (attribs.Length > 0)
{
NullValue = ((FieldNullValueAttribute)attribs[0]).NullValue;
// mNullValueOnWrite = ((FieldNullValueAttribute) attribs[0]).NullValueOnWrite;
if (NullValue != null)
{
if (!FieldTypeInternal.IsAssignableFrom(NullValue.GetType()))
{
throw new BadUsageException("The NullValue is of type: " + NullValue.GetType().Name +
" that is not asignable to the field " + FieldInfo.Name + " of type: " +
FieldTypeInternal.Name);
}
}
}
IsNullableType = FieldTypeInternal.IsValueType &&
FieldTypeInternal.IsGenericType &&
FieldTypeInternal.GetGenericTypeDefinition() == typeof(Nullable <>);
}
/// <summary>
/// Create a field base from a fieldinfo object
/// Verify the settings against the actual field to ensure it will work.
/// </summary>
/// <param name="fi">Field Info Object</param>
/// <param name="defaultCultureName">Default culture name used for each properties if no converter is specified otherwise. If null, the default decimal separator (".") will be used.</param>
internal FieldBase(FieldInfo fi, string defaultCultureName = null)
: this()
{
FieldInfo = fi;
FieldType = FieldInfo.FieldType;
MemberInfo attibuteTarget = fi;
FieldFriendlyName = AutoPropertyName(fi);
if (string.IsNullOrEmpty(FieldFriendlyName) == false)
{
var prop = fi.DeclaringType.GetProperty(FieldFriendlyName);
if (prop == null)
{
FieldFriendlyName = null;
}
else
{
attibuteTarget = prop;
}
}
if (FieldType.IsArray)
{
FieldTypeInternal = FieldType.GetElementType();
}
else
{
FieldTypeInternal = FieldType;
}
IsStringField = FieldTypeInternal == typeof(string);
object[] attribs = attibuteTarget.GetCustomAttributes(typeof(FieldConverterAttribute), true);
if (attribs.Length > 0)
{
var conv = (FieldConverterAttribute)attribs[0];
Converter = conv.Converter;
conv.ValidateTypes(FieldInfo);
}
else
{
Converter = ConvertHelpers.GetDefaultConverter(FieldFriendlyName ?? fi.Name,
FieldType,
defaultCultureName: defaultCultureName);
}
if (Converter != null)
{
Converter.mDestinationType = FieldTypeInternal;
}
attribs = attibuteTarget.GetCustomAttributes(typeof(FieldNullValueAttribute), true);
if (attribs.Length > 0)
{
NullValue = ((FieldNullValueAttribute)attribs[0]).NullValue;
if (NullValue != null)
{
if (!FieldTypeInternal.IsAssignableFrom(NullValue.GetType()))
{
throw new BadUsageException("The NullValue is of type: " + NullValue.GetType().Name +
" that is not asignable to the field " + FieldInfo.Name +
" of type: " +
FieldTypeInternal.Name);
}
}
}
IsNullableType = FieldTypeInternal.IsValueType &&
FieldTypeInternal.IsGenericType &&
FieldTypeInternal.GetGenericTypeDefinition() == typeof(Nullable <>);
}
public bool IsNull(object val)
{
if (val == null || val == DBNull.Value)
{
return(true);
}
// WARNING !!!
// == comparison result does not match that of .Equals
//bool BROKEN1 = NullValue != null && val == NullValue && val.GetType() == NullValue.GetType();
//bool BROKEN2 = NullValue != null && NullValue == val && val.GetType() == NullValue.GetType();
bool WORKS1 = NullValue != null && NullValue.Equals(val) && val.GetType() == NullValue.GetType();
//bool WORKS2 = NullValue != null && val.Equals( NullValue ) && val.GetType() == NullValue.GetType();
bool isSameValue = IsValueType && val.Equals(NullValue);
return(WORKS1 || isSameValue);
}
/// <summary>
/// Create a field base from a fieldinfo object
/// Verify the settings against the actual field to ensure it will work.
/// </summary>
/// <param name="fi">Field Info Object</param>
protected FieldBase(FieldInfo fi, string delimiter) : this()
{
FieldInfo = fi;
FieldType = FieldInfo.FieldType;
MemberInfo attibuteTarget = fi;
FieldFriendlyName = AutoPropertyName(fi);
if (string.IsNullOrEmpty(FieldFriendlyName) == false)
{
var prop = fi.DeclaringType.GetProperty(FieldFriendlyName);
if (prop == null)
{
FieldFriendlyName = null;
}
else
{
IsAutoProperty = true;
attibuteTarget = prop;
}
}
FieldTypeInternal = FieldType.IsArray ? FieldType.GetElementType() : FieldType;
IsStringField = FieldTypeInternal == typeof(string);
var attributes = attibuteTarget.GetCustomAttributes(typeof(FieldConverterAttribute), true);
foreach (var attribute in attributes)
{
var fc = attribute as FieldConverterAttribute;
if (fc != null)
{
fc.Delimiter = delimiter;
}
#if DEBUG
var del = attribute as DelimitedRecordAttribute;
if (del != null)
{
Debug.Assert(del.Delimiter == delimiter);
}
#endif
}
if (attributes.Length > 0)
{
var conv = (FieldConverterAttribute)attributes[0];
Converter = conv.Converter;
conv.ValidateTypes(FieldInfo);
}
else
{
Converter = ConverterFactory.GetDefaultConverter(FieldFriendlyName ?? fi.Name, FieldType);
}
if (Converter != null)
{
if (Converter.Type == null)
{
throw new ArgumentNullException(nameof(IFieldConverter.Type), $"Converter type [{Converter.GetType().Name}] can not be null!");
}
if (Converter.Type != FieldTypeInternal)
{
throw new TypeMismatchException(Converter.Type, $"{Converter.GetType().Name} destination type {Converter.Type} != expected type {FieldTypeInternal}");
}
//Converter.mDestinationType = FieldTypeInternal;
}
attributes = attibuteTarget.GetCustomAttributes(typeof(FieldNullValueAttribute), true);
if (attributes.Length > 0)
{
NullValue = ((FieldNullValueAttribute)attributes[0]).NullValue;
// mNullValueOnWrite = ((FieldNullValueAttribute) attribs[0]).NullValueOnWrite;
if (NullValue != null)
{
if (!FieldTypeInternal.IsAssignableFrom(NullValue.GetType()))
{
throw new BadUsageException(
$"The NullValue is of type: {NullValue.GetType().Name} which is not asignable to the field {FieldInfo.Name} Type: {FieldTypeInternal.Name}");
}
}
}
IsNullableType = FieldTypeInternal.IsValueType &&
FieldTypeInternal.IsGenericType &&
FieldTypeInternal.GetGenericTypeDefinition() == typeof(Nullable <>);
}
