private static int[] CreateMapping <TFrom, TTo>(
IKeyInfo <TFrom> primaryKeyInfo,
IKeyInfo <TTo> foreignKeyInfo,
IRelationContraint[] constraints,
bool invert)
{
int memberCount = primaryKeyInfo.EntityKeyMembers.Length;
if (foreignKeyInfo.EntityKeyMembers.Length != memberCount)
{
throw new ArgumentException("", "foreignKeyInfo");
}
if (constraints.Length != memberCount)
{
throw new ArgumentException("", "constraints");
}
List <int> mapping = new List <int>();
for (int i = 0; i < memberCount; i++)
{
MemberInfo fromMember = primaryKeyInfo.EntityKeyMembers[i];
IRelationContraint constraint = constraints
.FirstOrDefault(c =>
c.PrimaryField == fromMember);
if (constraint == null)
{
throw new ArgumentException("", "constraints");
}
int mappedIndex = foreignKeyInfo
.EntityKeyMembers
.ToList()
.IndexOf(constraint.ForeignField);
if (mappedIndex == -1)
{
throw new ArgumentException("", "constraints");
}
mapping.Add(mappedIndex);
}
if (invert)
{
List <int> invertedMapping = new List <int>();
for (int i = 0; i < memberCount; i++)
{
invertedMapping.Add(mapping.IndexOf(i));
}
mapping = invertedMapping;
}
return(mapping.ToArray());
}
public void Configure(AssociationInfo associationInfo, DbSchemaBuilder builder)
{
var primary = associationInfo.PrimaryTable;
var foreign = associationInfo.ForeignTable;
DbTableInfoBuilder primaryTable = builder.Find(primary.TableName);
DbTableInfoBuilder foreignTable = builder.Find(foreign.TableName);
MemberInfo[] primaryKeyMembers =
GetMembers(
primaryTable.EntityType,
primary.PropertyNames);
MemberInfo[] foreignKeyMembers =
GetMembers(
foreignTable.EntityType,
foreign.PropertyNames);
IKeyInfo primaryKeyInfo =
EnsureKey(
primaryKeyMembers,
true,
primaryTable);
IKeyInfo foreignKeyInfo =
EnsureKey(
foreignKeyMembers,
false,
foreignTable);
IRelationContraint[] relationConstraints =
new IRelationContraint[primaryKeyMembers.Length];
for (int i = 0; i < relationConstraints.Length; i++)
{
relationConstraints[i] =
new RelationConstraint(primaryKeyMembers[i], foreignKeyMembers[i]);
}
Delegate primaryToForeignConverter =
CreateConverter(
PrimaryToForeignConverterMethod,
primaryKeyInfo,
foreignKeyInfo,
relationConstraints);
Delegate foreignToPrimaryConverter =
CreateConverter(
ForeignToPrimaryConverterMethod,
primaryKeyInfo,
foreignKeyInfo,
relationConstraints);
builder.Register(
new DbRelationInfo(
primaryTable: primary.TableName,
primaryKeyInfo: primaryKeyInfo,
primaryToForeignConverter: primaryToForeignConverter,
foreignTable: foreign.TableName,
foreignKeyInfo: foreignKeyInfo,
foreignToPrimaryConverter: foreignToPrimaryConverter,
cascadedDelete: associationInfo.CascadedDelete));
}
public void Configure(AssociationInfo associationInfo, DbSchemaBuilder builder)
{
var primary = associationInfo.PrimaryTable;
var foreign = associationInfo.ForeignTable;
DbTableInfoBuilder primaryTable = builder.Find(primary.TableName);
DbTableInfoBuilder foreignTable = builder.Find(foreign.TableName);
MemberInfo[] primaryKeyMembers =
GetMembers(
primaryTable.EntityType,
primary.PropertyNames);
MemberInfo[] foreignKeyMembers =
GetMembers(
foreignTable.EntityType,
foreign.PropertyNames);
IKeyInfo primaryKeyInfo =
EnsureKey(
primaryKeyMembers,
true,
primaryTable);
IKeyInfo foreignKeyInfo =
EnsureKey(
foreignKeyMembers,
false,
foreignTable);
IRelationContraint[] relationConstraints =
new IRelationContraint[primaryKeyMembers.Length];
for (int i = 0; i < relationConstraints.Length; i++)
{
relationConstraints[i] =
new RelationConstraint(primaryKeyMembers[i], foreignKeyMembers[i]);
}
Delegate primaryToForeignConverter =
CreateConverter(
PrimaryToForeignConverterMethod,
primaryKeyInfo,
foreignKeyInfo,
relationConstraints);
Delegate foreignToPrimaryConverter =
CreateConverter(
ForeignToPrimaryConverterMethod,
primaryKeyInfo,
foreignKeyInfo,
relationConstraints);
builder.Register(
new DbRelationInfo(
primaryTable: primary.TableName,
primaryKeyInfo: primaryKeyInfo,
primaryToForeignConverter: primaryToForeignConverter,
foreignTable: foreign.TableName,
foreignKeyInfo: foreignKeyInfo,
foreignToPrimaryConverter: foreignToPrimaryConverter,
cascadedDelete: associationInfo.CascadedDelete));
}
private static Delegate CreateConverter(
MethodInfo converterMethod,
IKeyInfo primaryKeyInfo,
IKeyInfo foreignKeyInfo,
IRelationContraint[] relationConstraints)
{
MethodInfo factory = converterMethod
.GetGenericMethodDefinition()
.MakeGenericMethod(primaryKeyInfo.KeyType, foreignKeyInfo.KeyType);
Delegate result = factory.Invoke(
null,
new object[]
{
primaryKeyInfo,
foreignKeyInfo,
relationConstraints.ToArray()
}) as Delegate;
return result;
}
