public CachedEntityExpression(Expression primaryKey, Type type, CachedTableConstructor constructor, FieldEmbedded?embedded)
{
if (primaryKey == null)
{
throw new ArgumentNullException(nameof(primaryKey));
}
if (primaryKey.Type.UnNullify() != typeof(PrimaryKey))
{
throw new InvalidOperationException("primaryKey should be a PrimaryKey");
}
if (!type.IsEmbeddedEntity())
{
if (((Table)constructor.table).Type != type.CleanType())
{
throw new InvalidOperationException("Wrong type");
}
}
else
{
this.FieldEmbedded = embedded ?? throw new ArgumentNullException(nameof(embedded));
}
this.PrimaryKey = primaryKey;
this.type = type;
this.Constructor = constructor;
}
public MList <T> GetMList(PrimaryKey id, IRetriever retriever)
{
Interlocked.Increment(ref hits);
MList <T> result;
var dic = relationalRows.Value.TryGetC(id);
if (dic == null)
{
result = new MList <T>();
}
else
{
result = new MList <T>(dic.Count);
var innerList = ((IMListPrivate <T>)result).InnerList;
foreach (var obj in dic.Values)
{
innerList.Add(activator(obj, retriever));
}
((IMListPrivate)result).ExecutePostRetrieving();
}
CachedTableConstructor.resetModifiedAction(retriever, result);
return(result);
}
private Expression GetField(Field field, CachedTableConstructor constructor, Expression?previousPrimaryKey)
{
if (field is FieldValue)
{
var value = constructor.GetTupleProperty((IColumn)field);
return(value.Type == field.FieldType ? value : Expression.Convert(value, field.FieldType));
}
if (field is FieldEnum)
{
return(Expression.Convert(constructor.GetTupleProperty((IColumn)field), field.FieldType));
}
if (field is IFieldReference)
{
bool isLite = ((IFieldReference)field).IsLite;
if (field is FieldReference)
{
IColumn column = (IColumn)field;
return(GetEntity(isLite, column, field.FieldType.CleanType(), constructor));
}
if (field is FieldImplementedBy ib)
{
var nullRef = Expression.Constant(null, field.FieldType);
var call = ib.ImplementationColumns.Aggregate((Expression)nullRef, (acum, kvp) =>
{
IColumn column = (IColumn)kvp.Value;
var entity = GetEntity(isLite, column, kvp.Key, constructor);
return(Expression.Condition(Expression.NotEqual(constructor.GetTupleProperty(column), Expression.Constant(column.Type)),
Expression.Convert(entity, field.FieldType),
acum));
});
return(call);
}
if (field is FieldImplementedByAll)
{
throw new NotImplementedException("FieldImplementedByAll not supported in cached ToString");
}
}
if (field is FieldEmbedded fe)
{
return(new CachedEntityExpression(previousPrimaryKey !, fe.FieldType, constructor, fe));
}
if (field is FieldMList)
{
throw new NotImplementedException("FieldMList not supported in cached ToString");
}
throw new InvalidOperationException("Unexpected {0}".FormatWith(field.GetType().Name));
}
private Expression GetEntity(bool isLite, IColumn column, Type entityType, CachedTableConstructor constructor)
{
Expression id = constructor.GetTupleProperty(column);
var pk = CachedTableConstructor.WrapPrimaryKey(id);
CachedTableConstructor typeConstructor = CacheLogic.GetCacheType(entityType) == CacheType.Cached ?
CacheLogic.GetCachedTable(entityType).Constructor :
constructor.cachedTable.SubTables !.SingleEx(a => a.ParentColumn == column).Constructor;
return(new CachedEntityExpression(pk, entityType, typeConstructor, null !));
}
public static Expression <Func <PrimaryKey, string> > GetToString <T>(CachedTableConstructor constructor, Expression <Func <T, string> > lambda)
{
Table table = (Table)constructor.table;
var param = lambda.Parameters.SingleEx();
if (param.Type != table.Type)
{
throw new InvalidOperationException("incorrect lambda paramer type");
}
var pk = Expression.Parameter(typeof(PrimaryKey), "pk");
var root = new CachedEntityExpression(pk, typeof(T), constructor, null, null);
var visitor = new ToStringExpressionVisitor(param, root);
var result = visitor.Visit(lambda.Body);
return(Expression.Lambda <Func <PrimaryKey, string> >(result, pk));
}
public override void SchemaCompleted()
{
List <IColumn> columns = new List <IColumn> {
table.PrimaryKey
};
ParameterExpression reader = Expression.Parameter(typeof(FieldReader));
var expression = ToStringExpressionVisitor.GetToString(table, reader, columns);
//Query
using (ObjectName.OverrideOptions(new ObjectNameOptions {
AvoidDatabaseName = true
}))
{
string select = "SELECT {0}\r\nFROM {1} {2}\r\n".FormatWith(
columns.ToString(c => currentAlias + "." + c.Name.SqlEscape(), ", "),
table.Name.ToString(),
currentAlias.ToString());
select += this.lastPartialJoin + currentAlias + "." + table.PrimaryKey.Name.SqlEscape() + "\r\n" + this.remainingJoins;
query = new SqlPreCommandSimple(select);
}
//Reader
{
var kvpConstructor = Expression.New(CachedTableConstructor.ciKVPIntString,
CachedTableConstructor.NewPrimaryKey(FieldReader.GetExpression(reader, 0, this.table.PrimaryKey.Type)),
expression);
rowReader = Expression.Lambda <Func <FieldReader, KeyValuePair <PrimaryKey, string> > >(kvpConstructor, reader).Compile();
}
toStrings = new ResetLazy <Dictionary <PrimaryKey, string> >(() =>
{
CacheLogic.AssertSqlDependencyStarted();
var connector = (SqlConnector)Connector.Current;
var subConnector = connector.ForDatabase(table.Name.Schema?.Database);
Dictionary <PrimaryKey, string> result = new Dictionary <PrimaryKey, string>();
using (MeasureLoad())
using (Connector.Override(subConnector))
using (Transaction tr = Transaction.ForceNew(IsolationLevel.ReadCommitted))
{
if (CacheLogic.LogWriter != null)
{
CacheLogic.LogWriter.WriteLine("Load {0}".FormatWith(GetType().TypeName()));
}
((SqlConnector)Connector.Current).ExecuteDataReaderOptionalDependency(query, OnChange, fr =>
{
var kvp = rowReader(fr);
result[kvp.Key] = kvp.Value;
});
tr.Commit();
}
return(result);
}, mode: LazyThreadSafetyMode.ExecutionAndPublication);
if (this.subTables != null)
{
foreach (var item in this.subTables)
{
item.SchemaCompleted();
}
}
}
public CachedTableMList(ICacheLogicController controller, TableMList table, AliasGenerator aliasGenerator, string lastPartialJoin, string remainingJoins)
: base(controller)
{
this.table = table;
CachedTableConstructor ctr = this.Constructor = new CachedTableConstructor(this, aliasGenerator);
//Query
using (ObjectName.OverrideOptions(new ObjectNameOptions {
AvoidDatabaseName = true
}))
{
string select = "SELECT\r\n{0}\r\nFROM {1} {2}\r\n".FormatWith(
ctr.table.Columns.Values.ToString(c => ctr.currentAlias + "." + c.Name.SqlEscape(), ",\r\n"),
table.Name.ToString(),
ctr.currentAlias.ToString());
ctr.remainingJoins = lastPartialJoin + ctr.currentAlias + "." + table.BackReference.Name.SqlEscape() + "\r\n" + remainingJoins;
query = new SqlPreCommandSimple(select);
}
//Reader
{
rowReader = ctr.GetRowReader();
}
//Completer
{
List <Expression> instructions = new List <Expression>
{
Expression.Assign(ctr.origin, Expression.Convert(CachedTableConstructor.originObject, ctr.tupleType)),
Expression.Assign(result, ctr.MaterializeField(table.Field))
};
var ci = typeof(MList <T> .RowIdElement).GetConstructor(new [] { typeof(T), typeof(PrimaryKey), typeof(int?) });
var order = table.Order == null?Expression.Constant(null, typeof(int?)) :
ctr.GetTupleProperty(table.Order).Nullify();
instructions.Add(Expression.New(ci, result, CachedTableConstructor.NewPrimaryKey(ctr.GetTupleProperty(table.PrimaryKey)), order));
var block = Expression.Block(typeof(MList <T> .RowIdElement), new[] { ctr.origin, result }, instructions);
activatorExpression = Expression.Lambda <Func <object, IRetriever, MList <T> .RowIdElement> >(block, CachedTableConstructor.originObject, CachedTableConstructor.retriever);
activator = activatorExpression.Compile();
parentIdGetter = ctr.GetPrimaryKeyGetter(table.BackReference);
rowIdGetter = ctr.GetPrimaryKeyGetter(table.PrimaryKey);
}
relationalRows = new ResetLazy <Dictionary <PrimaryKey, Dictionary <PrimaryKey, object> > >(() =>
{
CacheLogic.AssertSqlDependencyStarted();
var connector = (SqlConnector)Connector.Current;
var subConnector = connector.ForDatabase(table.Name.Schema?.Database);
Dictionary <PrimaryKey, Dictionary <PrimaryKey, object> > result = new Dictionary <PrimaryKey, Dictionary <PrimaryKey, object> >();
using (MeasureLoad())
using (Connector.Override(subConnector))
using (Transaction tr = Transaction.ForceNew(IsolationLevel.ReadCommitted))
{
if (CacheLogic.LogWriter != null)
{
CacheLogic.LogWriter.WriteLine("Load {0}".FormatWith(GetType().TypeName()));
}
((SqlConnector)Connector.Current).ExecuteDataReaderOptionalDependency(query, OnChange, fr =>
{
object obj = rowReader(fr);
PrimaryKey parentId = parentIdGetter(obj);
var dic = result.TryGetC(parentId);
if (dic == null)
{
result[parentId] = dic = new Dictionary <PrimaryKey, object>();
}
dic[rowIdGetter(obj)] = obj;
});
tr.Commit();
}
return(result);
}, mode: LazyThreadSafetyMode.ExecutionAndPublication);
}
public CachedTable(ICacheLogicController controller, AliasGenerator aliasGenerator, string lastPartialJoin, string remainingJoins)
: base(controller)
{
this.table = Schema.Current.Table(typeof(T));
CachedTableConstructor ctr = this.Constructor = new CachedTableConstructor(this, aliasGenerator);
//Query
using (ObjectName.OverrideOptions(new ObjectNameOptions {
AvoidDatabaseName = true
}))
{
string select = "SELECT\r\n{0}\r\nFROM {1} {2}\r\n".FormatWith(
Table.Columns.Values.ToString(c => ctr.currentAlias + "." + c.Name.SqlEscape(), ",\r\n"),
table.Name.ToString(),
ctr.currentAlias.ToString());
ctr.remainingJoins = lastPartialJoin == null ? null : lastPartialJoin + ctr.currentAlias + ".Id\r\n" + remainingJoins;
if (ctr.remainingJoins != null)
{
select += ctr.remainingJoins;
}
query = new SqlPreCommandSimple(select);
}
//Reader
{
rowReader = ctr.GetRowReader();
}
//Completer
{
ParameterExpression me = Expression.Parameter(typeof(T), "me");
var block = ctr.MaterializeEntity(me, table);
completerExpression = Expression.Lambda <Action <object, IRetriever, T> >(block, CachedTableConstructor.originObject, CachedTableConstructor.retriever, me);
completer = completerExpression.Compile();
idGetter = ctr.GetPrimaryKeyGetter((IColumn)table.PrimaryKey);
}
rows = new ResetLazy <Dictionary <PrimaryKey, object> >(() =>
{
CacheLogic.AssertSqlDependencyStarted();
var connector = (SqlConnector)Connector.Current;
Table table = connector.Schema.Table(typeof(T));
var subConnector = connector.ForDatabase(table.Name.Schema?.Database);
Dictionary <PrimaryKey, object> result = new Dictionary <PrimaryKey, object>();
using (MeasureLoad())
using (Connector.Override(subConnector))
using (Transaction tr = Transaction.ForceNew(IsolationLevel.ReadCommitted))
{
if (CacheLogic.LogWriter != null)
{
CacheLogic.LogWriter.WriteLine("Load {0}".FormatWith(GetType().TypeName()));
}
((SqlConnector)Connector.Current).ExecuteDataReaderOptionalDependency(query, OnChange, fr =>
{
object obj = rowReader(fr);
result[idGetter(obj)] = obj; //Could be repeated joins
});
tr.Commit();
}
return(result);
}, mode: LazyThreadSafetyMode.ExecutionAndPublication);
if (!CacheLogic.WithSqlDependency && lastPartialJoin.HasText()) //Is semi
{
semiCachedController = new SemiCachedController <T>(this);
}
}
