private TProp GetDefaultValue <TProp>(ColumnMappingItem mapping, TProp defaultValue, ImportResult result = null)
{
if (mapping != null && mapping.Default.HasValue())
{
try
{
return(mapping.Default.Convert <TProp>(_segmenter.Culture));
}
catch (Exception exception)
{
if (result != null)
{
var msg = "Failed to convert default value '{0}'. Please specify a convertable default value. Column: {1}";
result.AddWarning(msg.FormatInvariant(mapping.Default, exception.Message), this.GetRowInfo(), mapping.SoureName);
}
}
}
return(defaultValue);
}
public bool SetProperty <TProp>(
ImportResult result,
string columnName,
Expression <Func <T, TProp> > prop,
TProp defaultValue = default(TProp),
Func <object, CultureInfo, TProp> converter = null)
{
// TBD: (MC) do not check or validate for perf reason?
//CheckInitialized();
var isPropertySet = false;
var pi = prop.ExtractPropertyInfo();
var propName = pi.Name;
var target = _entity;
columnName = columnName ?? propName;
try
{
object value;
var mapping = _segmenter.ColumnMap.GetMapping(columnName);
if (mapping.IgnoreProperty)
{
// explicitly ignore this property
}
else if (_row.TryGetValue(mapping.MappedName, out value) && value != null && value != DBNull.Value && !value.ToString().IsCaseInsensitiveEqual(ExplicitIgnore))
{
// source contains field value. Set it.
TProp converted;
if (converter != null)
{
converted = converter(value, _segmenter.Culture);
}
else if (value.ToString().IsCaseInsensitiveEqual(ExplicitNull))
{
// prop is "explicitly" set to null. Don't fallback to any default!
converted = default(TProp);
}
else
{
converted = value.Convert <TProp>(_segmenter.Culture);
}
var fastProp = FastProperty.GetProperty(target.GetUnproxiedType(), propName, PropertyCachingStrategy.EagerCached);
fastProp.SetValue(target, converted);
isPropertySet = true;
}
else
{
// source field value does not exist or is null/empty
if (IsNew)
{
// if entity is new and source field value is null, determine default value in this particular order:
// 2.) Default value in field mapping table
// 3.) passed default value argument
defaultValue = GetDefaultValue(mapping, defaultValue, result);
// source does not contain field data or is empty...
if (defaultValue != null)
{
// ...but the entity is new. In this case set the default value if given.
var fastProp = FastProperty.GetProperty(target.GetUnproxiedType(), propName, PropertyCachingStrategy.EagerCached);
fastProp.SetValue(target, defaultValue);
isPropertySet = true;
}
}
}
}
catch (Exception exception)
{
result.AddWarning("Conversion failed: " + exception.Message, this.GetRowInfo(), propName);
}
if (isPropertySet && !_isDirty)
{
_isDirty = true;
}
return(isPropertySet);
}
public bool SetProperty <TProp>(
ImportResult result,
T target,
Expression <Func <T, TProp> > prop,
TProp defaultValue = default(TProp),
Func <object, CultureInfo, TProp> converter = null)
{
// TBD: (MC) do not check for perf reason?
//CheckInitialized();
var isPropertySet = false;
var pi = prop.ExtractPropertyInfo();
var propName = pi.Name;
try
{
object value;
var mapping = _segmenter.ColumnMap.GetMapping(propName);
if (_row.TryGetValue(mapping.Property, out value))
{
// source contains field value. Set it.
TProp converted;
if (converter != null)
{
converted = converter(value, _segmenter.Culture);
}
else if (value == DBNull.Value || value.ToString().IsCaseInsensitiveEqual("NULL"))
{
converted = GetDefaultValue(mapping, propName, defaultValue, result);
}
else
{
converted = value.Convert <TProp>(_segmenter.Culture);
}
var fastProp = FastProperty.GetProperty(target.GetUnproxiedType(), propName, PropertyCachingStrategy.EagerCached);
fastProp.SetValue(target, converted);
isPropertySet = true;
}
else
{
if (IsTransient)
{
defaultValue = GetDefaultValue(mapping, propName, defaultValue, result);
// source does not contain field data or is empty...
if (defaultValue != null)
{
// ...but the entity is new. In this case set the default value if given.
var fastProp = FastProperty.GetProperty(target.GetUnproxiedType(), propName, PropertyCachingStrategy.EagerCached);
fastProp.SetValue(target, defaultValue);
isPropertySet = true;
}
}
}
}
catch (Exception exception)
{
result.AddWarning("Conversion failed: " + exception.Message, this.GetRowInfo(), propName);
}
return(isPropertySet);
}