private Dictionary <string, string> GetRelationKeysMapFromRelationType(string typeName)
{
Dictionary <string, string> retMap = new Dictionary <string, string>();
DynEntityType type = DynEntityTypeManager.GetEntityTypeMandatory(typeName);
foreach (DynPropertyConfiguration item in type.GetProperties())
{
object[] attrs = item.GetCustomAttributes(typeof(RelationKeyDynAttribute), item.IsInherited);
if (attrs.Length > 0)
{
RelationKeyDynAttribute rka = (RelationKeyDynAttribute)attrs[0];
try
{
retMap.Add(rka.RelatedType, item.Name);
}
catch
{
throw new NotSupportedException("Many to many relaion only supports single primary key entities.");
}
}
}
if (retMap.Count != 2)
{
throw new NotSupportedException("Relation entity could and must exactly contain two related key properties.");
}
return(retMap);
}
/// <summary>
/// Initializes a new instance of the <see cref="ManyToManyQueryDynAttribute"/> class.
/// </summary>
/// <param name="relationType">Type of the relation entity.</param>
public ManyToManyQueryDynAttribute(string relationName)
: base(QueryType.ManyToManyQuery)
{
DynEntityType relationType = DynEntityTypeManager.GetEntityType(relationName);
if (relationType == null)
{
throw new NotSupportedException("A entity type's relation entity type is not find, if you use it as ManyToMany attribute's relation type parameter.");
}
EntityDynAttribute[] attrs = relationType.GetCustomAttributes(typeof(RelationDynAttribute), true);
if (attrs == null || attrs.Length == 0)
{
throw new NotSupportedException("A entity type must be a relation entity type, if you use it as ManyToMany attribute's relation type parameter.");
}
this.relationType = relationName;
}
/// <summary>
/// Gets the type of the pk property.
/// </summary>
/// <param name="type">The type.</param>
/// <returns>The type.</returns>
internal static string GetPkPropertyType(string typeName)
{
string retType = null;
DynEntityType entityType = DynEntityTypeManager.GetEntityTypeMandatory(typeName);
foreach (DynPropertyConfiguration item in entityType.GetProperties())
{
if (item.GetCustomAttributes(typeof(PrimaryKeyDynAttribute), item.IsInherited) != null)
{
retType = item.PropertyType;
break;
}
}
if (retType == null)
{
//check base entities
foreach (DynEntityType baseType in entityType.GetAllBaseEntityTypes())
{
foreach (DynPropertyConfiguration item in baseType.GetProperties())
{
if (item.GetCustomAttributes(typeof(PrimaryKeyDynAttribute), item.IsInherited) != null)
{
retType = item.PropertyType;
break;
}
}
if (retType != null)
{
break;
}
}
}
return(retType);
}
