/// <summary>
/// Get (from store, or creating the first time it is needed) data contract for the type, columns spec and data mapper.
/// </summary>
/// <param name="IsGeneric"></param>
/// <param name="type"></param>
/// <param name="columns"></param>
/// <param name="mapper"></param>
/// <returns></returns>
/// <remarks>
/// In theory, mapping depends on Plugin, Factory, and ConnectionString as well;
/// in practice, including those would make it much harder to provide the very useful
/// <see cref="DataContract.Map(string)"/> feature.
/// I think it seems (more or less?) reasonable to suppose that any one class will only
/// be read from and written one database with one mapping at a time? In fact, since
/// Mighty only supports one mapping per class, maybe this is effectively enforced anyway?
/// </remarks>
internal DataContract Get(bool IsGeneric, Type type, string columns, SqlNamingMapper mapper)
{
DataContractKey key = new DataContractKey(IsGeneric, type, columns, mapper);
CacheHits++;
return(store.GetOrAdd(key, k => {
CacheHits--;
CacheMisses++;
return new DataContract(k);
}));
}
/// <summary>
/// Create a new data contract corresponding to the values in the key
/// </summary>
/// <param name="Key">All the items on which the contract depends</param>
public DataContract(DataContractKey Key)
{
this.Key = Key;
if (!Key.DynamicNullContract)
{
var ReadColumnList = new List <string>();
var KeyColumnsList = new List <string>();
bool foundControlledColumn;
bool foundRenamedColumn;
// These two don't need to be ConcurrentDictionary - they can't be written to concurrently (they are set up in the constructor then not modified), even though they may be read concurrently
ColumnNameToMemberInfo = new Dictionary <string, DataContractMemberInfo>(Key.DatabaseTableSettings.CaseSensitiveColumnMapping ? StringComparer.Ordinal : StringComparer.OrdinalIgnoreCase);
MemberNameToColumnName = new Dictionary <string, string>(Key.DatabaseTableSettings.CaseSensitiveColumnMapping ? StringComparer.Ordinal : StringComparer.OrdinalIgnoreCase);
if (Key.IsGeneric)
{
AddReflectedColumns(out bool fc1, out bool fr1, ReadColumnList, KeyColumnsList, Key, BindingFlags.Instance | BindingFlags.Public);
AddReflectedColumns(out bool fc2, out bool fr2, ReadColumnList, KeyColumnsList, Key, BindingFlags.Instance | BindingFlags.NonPublic);
foundControlledColumn = fc1 || fc2;
foundRenamedColumn = fr1 || fr2;
}
else
{
foreach (var column in Key.DynamicColumnSpec.Split(','))
{
AddReflectedColumn(out bool fc, out bool fr, ReadColumnList, KeyColumnsList, Key, null, column, true);
}
foundControlledColumn = true;
foundRenamedColumn = true;
}
if (foundControlledColumn)
{
// We have a read column list if there are any controlled columns (including e.g. ignored columns) in the contract
ReadColumns = string.Join(", ", ReadColumnList);
}
if (foundRenamedColumn)
{
// This switches on auto-mapping by defaut if there are any actually renamed columns
AutoMapSettings = Key.DatabaseTableSettings.AutoMap;
}
if (KeyColumnsList.Count > 0)
{
KeyColumns = string.Join(", ", KeyColumnsList);
}
}
}
/// <summary>
/// Include reflected columns
/// </summary>
/// <param name="foundControlledColumn"></param>
/// <param name="foundRenamedColumn"></param>
/// <param name="ReadColumnList"></param>
/// <param name="KeyColumnsList"></param>
/// <param name="key"></param>
/// <param name="bindingFlags"></param>
/// <returns>Whether a controlled column (<see cref="DatabaseColumnAttribute"/> or <see cref="DatabaseIgnoreAttribute"/>) was found</returns>
protected void AddReflectedColumns(
out bool foundControlledColumn, out bool foundRenamedColumn,
List <string> ReadColumnList, List <string> KeyColumnsList, DataContractKey key, BindingFlags bindingFlags)
{
foundControlledColumn = false;
foundRenamedColumn = false;
foreach (var member in key.DataItemType.GetMembers(bindingFlags)
.Where(m => m is FieldInfo || m is PropertyInfo))
{
AddReflectedColumn(
out bool fc, out bool fr,
ReadColumnList, KeyColumnsList, key, member, null, (bindingFlags & BindingFlags.Public) != 0);
foundControlledColumn = fc || foundControlledColumn;
foundRenamedColumn = fr || foundRenamedColumn;
}
}
/// <summary>
/// Get (from store, or creating the first time it is needed) data contract for the type, columns spec and data mapper.
/// </summary>
/// <param name="IsGeneric"></param>
/// <param name="type"></param>
/// <param name="columns"></param>
/// <param name="mapper"></param>
/// <returns></returns>
/// <remarks>
/// In theory, mapping depends on Plugin, Factory, and ConnectionString as well;
/// in practice, including those would make it much harder to provide the very useful
/// <see cref="DataContract.Map(string)"/> feature.
/// I think it seems (more or less?) reasonable to suppose that any one class will only
/// be read from and written one database with one mapping at a time? In fact, since
/// Mighty only supports one mapping per class, maybe this is effectively enforced anyway?
/// </remarks>
internal DataContract Get(bool IsGeneric, Type type, string columns, SqlNamingMapper mapper)
{
DataContractKey key = new DataContractKey(IsGeneric, type, columns, mapper);
DataContract value;
if (store.TryGetValue(key, out value))
{
CacheHits++;
}
else
{
CacheMisses++;
value = new DataContract(key);
store.Add(key, value);
}
return(value);
}
/// <summary>
/// Add a reflected field to the column list
/// </summary>
/// <param name="foundControlledColumn"></param>
/// <param name="foundRenamedColumn"></param>
/// <param name="ReadColumnList"></param>
/// <param name="KeyColumnsList"></param>
/// <param name="key"></param>
/// <param name="member"></param>
/// <param name="name"></param>
/// <param name="include">The initial default include status (depending on public, non-public or columns-driven)</param>
/// <returns>Whether a controlled column (<see cref="DatabaseColumnAttribute"/> or <see cref="DatabaseIgnoreAttribute"/>) was found</returns>
protected void AddReflectedColumn(
out bool foundControlledColumn, out bool foundRenamedColumn,
List <string> ReadColumnList, List <string> KeyColumnsList, DataContractKey key, MemberInfo member, string name, bool include)
{
foundControlledColumn = false;
foundRenamedColumn = false;
bool isKey = false;
string sqlColumnName = null;
DataDirection dataDirection = 0;
string transformSql = null;
// Control things by attributes
if (member != null)
{
foreach (var attr in member.GetCustomAttributes(false))
{
if (attr is DatabaseColumnAttribute)
{
var colAttr = (DatabaseColumnAttribute)attr;
include = true;
sqlColumnName = colAttr.Name;
dataDirection = colAttr.Direction;
transformSql = colAttr.Transform;
foundControlledColumn = true;
}
if (attr is DatabaseIgnoreAttribute)
{
include = false;
foundControlledColumn = true;
}
if (attr is DatabasePrimaryKeyAttribute)
{
isKey = true;
}
}
}
name = name ?? member.Name;
// Also control things by the mapper
DataDirection mapperDirection = key.ColumnDataDirection(key.DataItemType, name);
if (mapperDirection != 0)
{
// We could do one of several things, but to make it like the ignore setting, we're
// OR-ing the direction settings
dataDirection |= mapperDirection;
//// Not sure about this, but since having a column name in the mapper doesn't
//// switch this on, then probably this shouldn't either?
//foundcontrolledcolumn = true;
}
// The column will be ignored if the mapper or the attribute say so
if (key.IgnoreColumn(key.DataItemType, name))
{
include = false;
foundControlledColumn = true;
}
if (include)
{
// the column name from the attribute has precedence
sqlColumnName = sqlColumnName ?? key.ColumnName(key.DataItemType, name);
if (sqlColumnName != name)
{
foundRenamedColumn = true;
}
ColumnNameToMemberInfo.Add(sqlColumnName, new DataContractMemberInfo(key.DataItemType, member, name, dataDirection));
MemberNameToColumnName.Add(name, sqlColumnName);
ReadColumnList.Add($"{(transformSql != null ? $"{transformSql} AS " : "")}{sqlColumnName}");
if (isKey)
{
KeyColumnsList.Add(sqlColumnName);
}
}
}
