/// <summary>
/// Returns a list of keys from the given meta type based on the key list string.
/// </summary>
/// <param name="keyListString">The key list string.</param>
/// <param name="parentType">Type of the parent.</param>
/// <returns></returns>
private static ReadOnlyCollection<MetaDataMember> GetKeys(string keyListString, MetaType parentType)
{
if(keyListString != null)
{
var thisKeyList = new List<MetaDataMember>();
string[] keyNames = keyListString.Split(STRING_SEPERATOR, StringSplitOptions.RemoveEmptyEntries);
foreach (string rawKeyName in keyNames)
{
string keyName = rawKeyName.Trim();
//TODO: maybe speed the lookup up
MetaDataMember key = (from dataMember in parentType.PersistentDataMembers
where dataMember.Name == keyName
select dataMember).SingleOrDefault();
if(key == null)
{
string errorMessage = string.Format("Could not find key member '{0}' of key '{1}' on type '{2}'. The key may be wrong or the field or property on '{2}' has changed names.",
keyName, keyListString, parentType.Type.Name);
throw new InvalidOperationException(errorMessage);
}
thisKeyList.Add(key);
}
return new ReadOnlyCollection<MetaDataMember>(thisKeyList);
}
else //Key is the primary key of this table
{
return parentType.IdentityMembers;
}
}
public AttributedColumnMetaDataMember(MemberInfo member, ColumnAttribute attribute, MetaType declaringType)
: base(member, declaringType, attribute)
{
columnAttribute = attribute;
if (columnAttribute.Name == null)
columnAttribute.Name = memberInfo.Name;
}
internal SqlTable(MetaTable table, MetaType rowType, ProviderType sqlRowType, Expression sourceExpression)
: base(SqlNodeType.Table, sourceExpression) {
this.table = table;
this.rowType = rowType;
this.sqlRowType = sqlRowType;
this.columns = new List<SqlColumn>();
}
public AttributedColumnMetaDataMember(MemberInfo member, ColumnAttribute attribute, MetaType declaringType)
: base(member, declaringType, member.DeclaringType.GetSingleMember(attribute.Storage))
{
columnAttribute = attribute;
if (columnAttribute.Name == null)
columnAttribute.Name = memberInfo.Name;
}
internal static MetaType FindBase(MetaType derivedType)
{
if(derivedType.Type == typeof(object))
{
return null;
}
var clrType = derivedType.Type; // start
var rootClrType = derivedType.InheritanceRoot.Type; // end
var metaTable = derivedType.Table;
MetaType metaType = null;
while(true)
{
if(clrType == typeof(object) || clrType == rootClrType)
{
return null;
}
clrType = clrType.BaseType;
metaType = derivedType.InheritanceRoot.GetInheritanceType(clrType);
if(metaType != null)
{
return metaType;
}
}
}
public DLinqTableProvider(DLinqDataModelProvider dataModel, MetaType rowType, string name, PropertyInfo prop)
: base(dataModel) {
_prop = prop;
_rowType = rowType;
Name = name;
DataContextPropertyName = prop.Name;
EntityType = rowType.Type;
ParentEntityType = rowType.InheritanceBase != null ? rowType.InheritanceBase.Type : null;
RootEntityType = rowType.Table.RowType.Type;
_columns = new List<ColumnProvider>();
var members = new List<MetaDataMember>(rowType.DataMembers);
// Add in base-class-first order (not the typical derived-class-first order)
foreach (PropertyInfo propInfo in GetOrderedProperties(rowType.Type)) {
MetaDataMember member = members.FirstOrDefault(m => m.Member.Name == propInfo.Name);
if (member != null) {
AddColumn(dataModel, member, propInfo);
members.Remove(member);
}
}
// Anything we might've missed, tack it onto the end
foreach (MetaDataMember member in members) {
AddColumn(dataModel, member, (PropertyInfo)member.Member);
}
_roColumns = new ReadOnlyCollection<ColumnProvider>(_columns);
}
internal UnmappedDataMember(MetaType declaringType, MemberInfo mi, int ordinal)
{
this.declaringType = declaringType;
this.member = mi;
this.ordinal = ordinal;
this.type = TypeSystem.GetMemberType(mi);
}
/// <summary>
/// Given a type root and a discriminator, return the type that would be instantiated.
/// </summary>
private static MetaType TypeFromDiscriminator(MetaType root, object discriminator) {
foreach (MetaType type in root.InheritanceTypes) {
if (IsSameDiscriminator(discriminator, type.InheritanceCode))
return type;
}
return root.InheritanceDefault;
}
public RepositoryMetaType(string workspace, MetaType original, MetaTable table, MetaModel metaModel)
{
this.Workspace = workspace;
this.Original = original;
this.RepositoryMetaTable = table;
this.RepositoryMetaModel = metaModel;
}
public override bool IsDeclaredBy(MetaType metaType)
{
if(metaType == null)
{
throw Error.ArgumentNull("metaType");
}
return metaType.Type == this.member.DeclaringType;
}
internal AttributedMetaAssociation(AttributedMetaDataMember member, AssociationAttribute attr)
{
this.thisMember = member;
this.isMany = TypeSystem.IsSequenceType(this.thisMember.Type);
Type ot = this.isMany ? TypeSystem.GetElementType(this.thisMember.Type) : this.thisMember.Type;
this.otherType = this.thisMember.DeclaringType.Model.GetMetaType(ot);
this.thisKey = (attr.ThisKey != null) ? MakeKeys(this.thisMember.DeclaringType, attr.ThisKey) : this.thisMember.DeclaringType.IdentityMembers;
this.otherKey = (attr.OtherKey != null) ? MakeKeys(otherType, attr.OtherKey) : this.otherType.IdentityMembers;
this.thisKeyIsPrimaryKey = AreEqual(this.thisKey, this.thisMember.DeclaringType.IdentityMembers);
this.otherKeyIsPrimaryKey = AreEqual(this.otherKey, this.otherType.IdentityMembers);
this.isForeignKey = attr.IsForeignKey;
this.isUnique = attr.IsUnique;
this.deleteRule = attr.DeleteRule;
this.deleteOnNull = attr.DeleteOnNull;
// if any key members are not nullable, the association is not nullable
foreach(MetaDataMember mm in thisKey)
{
if(!mm.CanBeNull)
{
this.isNullable = false;
break;
}
}
// validate DeleteOnNull specification
if(deleteOnNull == true)
{
if(!(isForeignKey && !isMany && !isNullable))
{
throw Error.InvalidDeleteOnNullSpecification(member);
}
}
//validate the number of ThisKey columns is the same as the number of OtherKey columns
if(this.thisKey.Count != this.otherKey.Count && this.thisKey.Count > 0 && this.otherKey.Count > 0)
{
throw Error.MismatchedThisKeyOtherKey(member.Name, member.DeclaringType.Name);
}
// determine reverse reference member
foreach(MetaDataMember omm in this.otherType.PersistentDataMembers)
{
AssociationAttribute oattr = (AssociationAttribute)Attribute.GetCustomAttribute(omm.Member, typeof(AssociationAttribute));
if(oattr != null)
{
if(omm != this.thisMember && oattr.Name == attr.Name)
{
this.otherMember = omm;
break;
}
}
}
}
internal MappedDataMember(MetaType declaringType, MemberInfo mi, MemberMapping map, int ordinal)
{
this.declaringType = declaringType;
this.member = mi;
this.ordinal = ordinal;
this.type = TypeSystem.GetMemberType(mi);
this.isNullableType = TypeSystem.IsNullableType(this.type);
this.memberMap = map;
if(this.memberMap != null && this.memberMap.StorageMemberName != null)
{
MemberInfo[] mis = mi.DeclaringType.GetMember(this.memberMap.StorageMemberName, BindingFlags.Instance | BindingFlags.NonPublic);
if(mis == null || mis.Length != 1)
{
throw Error.BadStorageProperty(this.memberMap.StorageMemberName, mi.DeclaringType, mi.Name);
}
this.storageMember = mis[0];
}
Type storageType = this.storageMember != null ? TypeSystem.GetMemberType(this.storageMember) : this.type;
this.isDeferred = IsDeferredType(storageType);
ColumnMapping cmap = map as ColumnMapping;
if(cmap != null && cmap.IsDbGenerated && cmap.IsPrimaryKey)
{
// auto-gen identities must be synced on insert
if((cmap.AutoSync != AutoSync.Default) && (cmap.AutoSync != AutoSync.OnInsert))
{
throw Error.IncorrectAutoSyncSpecification(mi.Name);
}
}
if(cmap != null)
{
this.isPrimaryKey = cmap.IsPrimaryKey;
this.isVersion = cmap.IsVersion;
this.isDBGenerated = cmap.IsDbGenerated || !string.IsNullOrEmpty(cmap.Expression) || this.isVersion;
this.isDiscriminator = cmap.IsDiscriminator;
this.canBeNull = cmap.CanBeNull == null ? this.isNullableType || !this.type.IsValueType : (bool)cmap.CanBeNull;
this.dbType = cmap.DbType;
this.expression = cmap.Expression;
this.updateCheck = cmap.UpdateCheck;
// auto-gen keys are always and only synced on insert
if(this.IsDbGenerated && this.IsPrimaryKey)
{
this.autoSync = AutoSync.OnInsert;
}
else if(cmap.AutoSync != AutoSync.Default)
{
// if the user has explicitly set it, use their value
this.autoSync = cmap.AutoSync;
}
else if(this.IsDbGenerated)
{
// database generated members default to always
this.autoSync = AutoSync.Always;
}
}
this.mappedName = this.memberMap.DbName != null ? this.memberMap.DbName : this.member.Name;
}
internal SqlDiscriminatedType(ProviderType sqlType, SqlExpression discriminator, MetaType targetType, Expression sourceExpression)
: base(SqlNodeType.DiscriminatedType,
typeof(Type),
sourceExpression) {
if (discriminator == null)
throw Error.ArgumentNull("discriminator");
this.discriminator = discriminator;
this.targetType = targetType;
this.sqlType = sqlType;
}
internal SqlTypeCase(Type clrType, ProviderType sqlType, MetaType rowType, SqlExpression discriminator, IEnumerable<SqlTypeCaseWhen> whens, Expression sourceExpression)
: base(SqlNodeType.TypeCase, clrType, sourceExpression) {
this.Discriminator = discriminator;
if (whens == null)
throw Error.ArgumentNull("whens");
this.whens.AddRange(whens);
if (this.whens.Count == 0)
throw Error.ArgumentOutOfRange("whens");
this.sqlType = sqlType;
this.rowType = rowType;
}
internal SqlLink(object id, MetaType rowType, Type clrType, ProviderType sqlType, SqlExpression expression, MetaDataMember member, IEnumerable<SqlExpression> keyExpressions, SqlExpression expansion, Expression sourceExpression)
: base(SqlNodeType.Link, clrType, sqlType, sourceExpression) {
this.id = id;
this.rowType = rowType;
this.expansion = expansion;
this.expression = expression;
this.member = member;
this.keyExpressions = new List<SqlExpression>();
if (keyExpressions != null)
this.keyExpressions.AddRange(keyExpressions);
}
private object locktarget = new object(); // Hold locks on private object rather than public MetaType.
#endregion
internal MappedType(MetaModel model, MetaTable table, TypeMapping typeMapping, Type type, MetaType inheritanceRoot)
{
this.model = model;
this.table = table;
this.typeMapping = typeMapping;
this.type = type;
this.inheritanceRoot = inheritanceRoot != null ? inheritanceRoot : this;
this.InitDataMembers();
this.identities = this.dataMembers.Where(m => m.IsPrimaryKey).ToList().AsReadOnly();
this.persistentDataMembers = this.dataMembers.Where(m => m.IsPersistent).ToList().AsReadOnly();
}
object locktarget = new object(); // Hold locks on private object rather than public MetaType.
internal AttributedMetaType(MetaModel model, MetaTable table, Type type, MetaType inheritanceRoot)
{
this.model = model;
this.table = table;
this.type = type;
this.inheritanceRoot = (inheritanceRoot != null) ? inheritanceRoot : this;
// Not lazy-loading to simplify locking and enhance performance
// (because no lock will be required for the common read scenario).
this.InitDataMembers();
this.identities = this.dataMembers.Where(m => m.IsPrimaryKey).ToList().AsReadOnly();
this.persistentMembers = this.dataMembers.Where(m => m.IsPersistent).ToList().AsReadOnly();
}
internal SqlSelect BuildDefaultQuery(MetaType rowType, bool allowDeferred, SqlLink link, Expression source) {
System.Diagnostics.Debug.Assert(rowType != null && rowType.Table != null);
if (rowType.HasInheritance && rowType.InheritanceRoot != rowType) {
// RowType is expected to be an inheritance root.
throw Error.ArgumentWrongValue("rowType");
}
SqlTable table = sql.Table(rowType.Table, rowType, source);
SqlAlias tableAlias = new SqlAlias(table);
SqlAliasRef tableAliasRef = new SqlAliasRef(tableAlias);
SqlExpression projection = this.BuildProjection(tableAliasRef, table.RowType, allowDeferred, link, source);
return new SqlSelect(projection, tableAlias, source);
}
protected AttributedAbstractMetaDataMember(MemberInfo member, MetaType declaringType, DataAttribute attribute)
{
memberInfo = member;
memberAccessor = LambdaMetaAccessor.Create(member, declaringType.Type);
this.declaringType = declaringType;
if(attribute.Storage != null)
{
storageMember = member.DeclaringType.GetSingleMember(attribute.Storage);
if (storageMember != null)
storageAccessor = LambdaMetaAccessor.Create(storageMember, declaringType.Type);
}
}
public AttributedMetaTable(TableAttribute attribute, MetaType type, MetaModel model)
{
_tableAttribute = attribute;
_metaType = type;
_containingModel = model;
//If the attribute doesn't specify a table name the name of the table class is used
if(!string.IsNullOrEmpty(attribute.Name))
{
_tableName = attribute.Name;
}
else
{
_tableName = type.Name;
}
}
private void SetCurrent(MetaType type)
{
type = type.InheritanceRoot;
if(this.currentType != type)
{
if(!this.caches.TryGetValue(type, out this.currentCache))
{
KeyManager km = GetKeyManager(type);
this.currentCache = (IdentityCache)Activator.CreateInstance(
typeof(IdentityCache<,>).MakeGenericType(type.Type, km.KeyType),
BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, null,
new object[] { km }, null
);
this.caches.Add(type, this.currentCache);
}
this.currentType = type;
}
}
/// <summary>
/// Given a MetaType and a set of key fields, return the set of MetaDataMembers
/// corresponding to the key.
/// </summary>
protected static ReadOnlyCollection<MetaDataMember> MakeKeys(MetaType mtype, string keyFields)
{
string[] names = keyFields.Split(keySeparators);
MetaDataMember[] members = new MetaDataMember[names.Length];
for(int i = 0; i < names.Length; i++)
{
names[i] = names[i].Trim();
MemberInfo[] rmis = mtype.Type.GetMember(names[i], BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
if(rmis == null || rmis.Length != 1)
{
throw Error.BadKeyMember(names[i], keyFields, mtype.Name);
}
members[i] = mtype.GetDataMember(rmis[0]);
if(members[i] == null)
{
throw Error.BadKeyMember(names[i], keyFields, mtype.Name);
}
}
return new List<MetaDataMember>(members).AsReadOnly();
}
private void InitOther()
{
if(this.otherType == null)
{
Type ot = this.isMany ? TypeSystem.GetElementType(this.thisMember.Type) : this.thisMember.Type;
this.otherType = this.thisMember.DeclaringType.Model.GetMetaType(ot);
System.Diagnostics.Debug.Assert(this.otherType.IsEntity);
this.otherKey = (assocMap.OtherKey != null)
? MakeKeys(this.otherType, this.assocMap.OtherKey)
: this.otherType.IdentityMembers;
this.otherKeyIsPrimaryKey = AreEqual(this.otherKey, this.otherType.IdentityMembers);
foreach(MetaDataMember omm in this.otherType.DataMembers)
{
if(omm.IsAssociation && omm != this.thisMember && omm.MappedName == this.thisMember.MappedName)
{
this.otherMember = omm;
break;
}
}
}
}
internal SqlNew(MetaType metaType, ProviderType sqlType, ConstructorInfo cons, IEnumerable<SqlExpression> args, IEnumerable<MemberInfo> argMembers, IEnumerable<SqlMemberAssign> members, Expression sourceExpression)
: base(SqlNodeType.New, metaType.Type, sqlType, sourceExpression) {
this.metaType = metaType;
if (cons == null && metaType.Type.IsClass) { // structs do not need to have a constructor
throw Error.ArgumentNull("cons");
}
this.constructor = cons;
this.args = new List<SqlExpression>();
this.argMembers = new List<MemberInfo>();
this.members = new List<SqlMemberAssign>();
if (args != null) {
this.args.AddRange(args);
}
if (argMembers != null) {
this.argMembers.AddRange(argMembers);
}
if (members != null) {
this.members.AddRange(members);
}
}
static KeyManager GetKeyManager(MetaType type)
{
int n = type.IdentityMembers.Count;
MetaDataMember mm = type.IdentityMembers[0];
KeyManager km = (KeyManager)Activator.CreateInstance(
typeof(SingleKeyManager<,>).MakeGenericType(type.Type, mm.Type),
BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, null,
new object[] { mm.StorageAccessor, 0 }, null
);
for(int i = 1; i < n; i++)
{
mm = type.IdentityMembers[i];
km = (KeyManager)
Activator.CreateInstance(
typeof(MultiKeyManager<,,>).MakeGenericType(type.Type, mm.Type, km.KeyType),
BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, null,
new object[] { mm.StorageAccessor, i, km }, null
);
}
return km;
}
private TrackedObject Track(MetaType mt, object obj, Dictionary<object, object> visited, bool recurse, int level)
{
StandardTrackedObject tracked = (StandardTrackedObject)this.GetTrackedObject(obj);
if(tracked != null || visited.ContainsKey(obj))
{
return tracked;
}
// The root object tracked is tracked normally - all other objects
// in the reference graph are weakly tracked.
bool weaklyTrack = level > 1;
tracked = new StandardTrackedObject(this, mt, obj, obj, weaklyTrack);
if(tracked.HasDeferredLoaders)
{
throw Error.CannotAttachAddNonNewEntities();
}
this.items.Add(obj, tracked);
this.Attach(obj);
visited.Add(obj, obj);
if(recurse)
{
// track parents (objects we are dependent on)
foreach(RelatedItem parent in this.services.GetParents(mt, obj))
{
this.Track(parent.Type, parent.Item, visited, recurse, level + 1);
}
// track children (objects that are dependent on us)
foreach(RelatedItem child in this.services.GetChildren(mt, obj))
{
this.Track(child.Type, child.Item, visited, recurse, level + 1);
}
}
return tracked;
}
internal SqlExpression BuildProjection(SqlExpression item, MetaType rowType, bool allowDeferred, SqlLink link, Expression source) {
if (!rowType.HasInheritance) {
return this.BuildProjectionInternal(item, rowType, (rowType.Table != null) ? rowType.PersistentDataMembers : rowType.DataMembers, allowDeferred, link, source);
}
else {
// Build a type case that represents a switch between the various type.
List<MetaType> mappedTypes = new List<MetaType>(rowType.InheritanceTypes);
List<SqlTypeCaseWhen> whens = new List<SqlTypeCaseWhen>();
SqlTypeCaseWhen @else = null;
MetaType root = rowType.InheritanceRoot;
MetaDataMember discriminator = root.Discriminator;
Type dt = discriminator.Type;
SqlMember dm = sql.Member(item, discriminator.Member);
foreach (MetaType type in mappedTypes) {
if (type.HasInheritanceCode) {
SqlNew defaultProjection = this.BuildProjectionInternal(item, type, type.PersistentDataMembers, allowDeferred, link, source);
if (type.IsInheritanceDefault) {
@else = new SqlTypeCaseWhen(null, defaultProjection);
}
// Add an explicit case even for the default.
// Redundant results will be optimized out later.
object code = InheritanceRules.InheritanceCodeForClientCompare(type.InheritanceCode, dm.SqlType);
SqlExpression match = sql.Value(dt, sql.Default(discriminator), code, true, source);
whens.Add(new SqlTypeCaseWhen(match, defaultProjection));
}
}
if (@else == null) {
throw Error.EmptyCaseNotSupported();
}
whens.Add(@else); // Add the else at the end.
return sql.TypeCase(root.Type, root, dm, whens.ToArray(), source);
}
}
private void ObserveUntrackedObjects(MetaType type, object item, Dictionary<object, object> visited) {
if (!visited.ContainsKey(item)) {
visited.Add(item, item);
TrackedObject tracked = this.tracker.GetTrackedObject(item);
if (tracked == null) {
tracked = this.tracker.Track(item);
tracked.ConvertToNew();
} else if (tracked.IsDead || tracked.IsRemoved) {
// ignore
return;
}
// search parents (objects we are dependent on)
foreach (RelatedItem parent in this.services.GetParents(type, item)) {
this.ObserveUntrackedObjects(parent.Type, parent.Item, visited);
}
// synch up primary key unless its generated.
if (tracked.IsNew) {
if (!tracked.IsPendingGeneration(tracked.Type.IdentityMembers)) {
tracked.SynchDependentData();
}
}
// search children (objects that are dependent on us)
foreach (RelatedItem child in this.services.GetChildren(type, item)) {
this.ObserveUntrackedObjects(child.Type, child.Item, visited);
}
}
}
private void TrackUntrackedObjects(MetaType type, object item, Dictionary<object, object> visited) {
if (!visited.ContainsKey(item)) {
visited.Add(item, item);
TrackedObject tracked = this.tracker.GetTrackedObject(item);
if (tracked == null) {
tracked = this.tracker.Track(item);
tracked.ConvertToNew();
}
else if (tracked.IsDead || tracked.IsRemoved) {
// ignore
return;
}
// search parents (objects we are dependent on)
foreach (RelatedItem parent in this.services.GetParents(type, item)) {
this.TrackUntrackedObjects(parent.Type, parent.Item, visited);
}
// synch up primary key
if (tracked.IsNew) {
tracked.InitializeDeferredLoaders();
if (!tracked.IsPendingGeneration(tracked.Type.IdentityMembers)) {
tracked.SynchDependentData();
object cached = this.services.InsertLookupCachedObject(tracked.Type, item);
if (cached != item) {
TrackedObject cachedTracked = this.tracker.GetTrackedObject(cached);
Debug.Assert(cachedTracked != null);
if (cachedTracked.IsDeleted || cachedTracked.CanInferDelete()) {
// adding new object with same ID as object being deleted.. turn into modified
tracked.ConvertToPossiblyModified(cachedTracked.Original);
// turn deleted to dead...
cachedTracked.ConvertToDead();
this.services.RemoveCachedObjectLike(tracked.Type, item);
this.services.InsertLookupCachedObject(tracked.Type, item);
}
else if (!cachedTracked.IsDead) {
throw new DuplicateKeyException(item, Strings.CantAddAlreadyExistingKey);
}
}
}
else {
// we may have a generated PK, however we set the PK on this new item to
// match a deleted item
object cached = this.services.GetCachedObjectLike(tracked.Type, item);
if (cached != null) {
TrackedObject cachedTracked = this.tracker.GetTrackedObject(cached);
Debug.Assert(cachedTracked != null);
if (cachedTracked.IsDeleted || cachedTracked.CanInferDelete()) {
// adding new object with same ID as object being deleted.. turn into modified
tracked.ConvertToPossiblyModified(cachedTracked.Original);
// turn deleted to dead...
cachedTracked.ConvertToDead();
this.services.RemoveCachedObjectLike(tracked.Type, item);
this.services.InsertLookupCachedObject(tracked.Type, item);
}
}
}
}
// search children (objects that are dependent on us)
foreach (RelatedItem child in this.services.GetChildren(type, item)) {
this.TrackUntrackedObjects(child.Type, child.Item, visited);
}
}
}
private static void SendOnValidate(MetaType type, TrackedObject item, ChangeAction changeAction) {
if (type != null) {
SendOnValidate(type.InheritanceBase, item, changeAction);
if (type.OnValidateMethod != null) {
try {
type.OnValidateMethod.Invoke(item.Current, new object[] { changeAction });
} catch (TargetInvocationException tie) {
if (tie.InnerException != null) {
throw tie.InnerException;
}
throw;
}
}
}
}
public abstract bool IsDeclaredBy(MetaType type);
