public bool ActivateFor(IRow row)
{
var attrs = row.GetType().GetCustomAttributes <UpdatableExtensionAttribute>();
if (attrs == null || !attrs.Any())
{
return(false);
}
var sourceByExpression = row.GetFields().ToLookup(x =>
BracketLocator.ReplaceBrackets(x.Expression.TrimToEmpty(), BracketRemoverDialect.Instance));
infoList = attrs.Select(attr =>
{
var info = new RelationInfo
{
Attr = attr
};
var rowType = attr.RowType;
if (rowType.IsAbstract ||
!typeof(IRow).IsAssignableFrom(rowType) ||
rowType.IsInterface)
{
throw new ArgumentException(string.Format(
"Row type '{1}' has an ExtensionRelation attribute " +
"but its specified extension row type '{0}' is not a valid row class!",
rowType.FullName,
row.GetType().FullName));
}
info.RowFactory = () => (IRow)Activator.CreateInstance(rowType);
var thisKey = attr.ThisKey;
if (string.IsNullOrEmpty(thisKey))
{
if (!(row is IIdRow))
{
throw new ArgumentException(string.Format(
"Row type '{0}' has an ExtensionRelation attribute " +
"but its ThisKey is not specified!",
row.GetType().FullName));
}
info.ThisKeyField = row.IdField;
}
else
{
info.ThisKeyField = row.FindFieldByPropertyName(attr.ThisKey) ??
row.FindField(attr.ThisKey);
if (info.ThisKeyField is null)
{
throw new ArgumentException(string.Format("Field '{0}' doesn't exist in row of type '{1}'." +
"This field is specified for an ExtensionRelation attribute",
attr.ThisKey,
row.GetType().FullName));
}
}
var ext = info.RowFactory();
var otherKey = attr.OtherKey;
if (string.IsNullOrEmpty(otherKey))
{
info.OtherKeyField = ext.FindField(info.ThisKeyField.Name);
if (info.OtherKeyField is null && ext is IIdRow)
{
info.OtherKeyField = row.IdField;
}
if (info.OtherKeyField is null)
{
throw new ArgumentException(string.Format(
"Row type '{1}' has an ExtensionRelation attribute " +
"but its OtherKey is not specified!",
row.GetType().FullName));
}
}
else
{
info.OtherKeyField = ext.FindFieldByPropertyName(attr.OtherKey) ?? ext.FindField(attr.OtherKey);
if (info.OtherKeyField is null)
{
throw new ArgumentException(string.Format("Field '{0}' doesn't exist in row of type '{1}'." +
"This field is specified for an ExtensionRelation attribute on '{2}'",
attr.OtherKey,
ext.GetType().FullName,
row.GetType().FullName));
}
}
if (!string.IsNullOrEmpty(attr.FilterField))
{
info.FilterField = ext.FindFieldByPropertyName(attr.FilterField) ?? ext.FindField(attr.FilterField);
if (info.FilterField is null)
{
throw new ArgumentException(string.Format("Field '{0}' doesn't exist in row of type '{1}'." +
"This field is specified as FilterField for an ExtensionRelation attribute on '{2}'",
attr.OtherKey,
ext.GetType().FullName,
row.GetType().FullName));
}
info.FilterValue = info.FilterField.ConvertValue(attr.FilterValue, CultureInfo.InvariantCulture);
}
if (!string.IsNullOrEmpty(attr.PresenceField))
{
info.PresenceField = row.FindFieldByPropertyName(attr.PresenceField) ?? row.FindField(attr.PresenceField);
if (info.PresenceField is null)
{
throw new ArgumentException(string.Format("Field '{0}' doesn't exist in row of type '{1}'." +
"This field is specified as PresenceField as an ExtensionRelation attribute.",
attr.PresenceField,
row.GetType().FullName));
}
info.PresenceValue = attr.PresenceValue;
}
var extFields = ext.GetFields();
var alias = attr.Alias;
var aliasPrefix = attr.Alias + "_";
var joinByKey = new HashSet <string>(extFields.Joins.Keys, StringComparer.OrdinalIgnoreCase);
string mapAlias(string x)
{
if (x == "t0" || x == "T0")
{
return(alias);
}
if (!joinByKey.Contains(x))
{
return(x);
}
return(aliasPrefix + x);
}
string mapExpression(string x)
{
if (x == null)
{
return(null);
}
return(JoinAliasLocator.ReplaceAliases(x, mapAlias));
}
info.Mappings = new List <Tuple <Field, Field> >();
foreach (var field in extFields)
{
if (ReferenceEquals(info.OtherKeyField, field))
{
continue;
}
if (ReferenceEquals(info.FilterField, field))
{
continue;
}
var expression = field.Expression.TrimToEmpty();
if (string.IsNullOrEmpty(expression))
{
continue;
}
expression = mapExpression(expression);
expression = BracketLocator.ReplaceBrackets(expression,
BracketRemoverDialect.Instance);
var match = sourceByExpression[expression].FirstOrDefault();
if (match is null)
{
continue;
}
if (match.IsTableField())
{
continue;
}
if (ReferenceEquals(info.ThisKeyField, match))
{
continue;
}
if (field.GetType() != match.GetType())
{
throw new ArgumentException(string.Format(
"Row type '{0}' has an ExtensionRelation attribute to '{1}'." +
"Their '{2}' and '{3}' fields are matched but they have different types ({4} and {5})!",
row.GetType().FullName,
ext.GetType().FullName,
field.PropertyName ?? field.Name,
match.PropertyName ?? match.Name,
field.GetType().Name,
match.GetType().Name));
}
info.Mappings.Add(new Tuple <Field, Field>(match, field));
}
if (info.Mappings.Count == 0)
{
throw new ArgumentException(string.Format(
"Row type '{0}' has an ExtensionRelation attribute " +
"but no view fields could be matched to extension row '{1}'!",
row.GetType().FullName,
ext.GetType().FullName));
}
return(info);
}).ToList();
return(true);
}
public void ReplaceAliasesIgnoresBracedAliases()
{
var result = JoinAliasLocator.ReplaceAliases("x.y + [a].b + y.z + [a].[b].d", x => "_" + x);
Assert.Equal("_x.y + [a].b + _y.z + [a].[b].d", result);
}