public Func <IDataReader, RequestContext, object> GetParser(IDataReaderWrapper dataReader, RequestContext requestContext, Type targetType)
{
string key = $"{requestContext.StatementKey}_{GetColumnKey(dataReader)}_{targetType.FullName}";
if (!_cachedDeserializer.ContainsKey(key))
{
lock (this)
{
if (!_cachedDeserializer.ContainsKey(key))
{
Func <IDataReader, RequestContext, object> deser = null;
if (targetType.IsValueType || targetType == TypeUtils.StringType)
{
deser = CreateValueTypeParserImpl(dataReader, requestContext, targetType);
}
else
{
deser = CreateParserImpl(dataReader, requestContext, targetType);
}
_cachedDeserializer.Add(key, deser);
}
}
}
return(_cachedDeserializer[key]);
}
private bool Query(string sql, Dictionary <string, object> parms, out IDataWrapper reader)
{
try
{
DB2Command cmd = new DB2Command(sql, conn, trans)
{
CommandTimeout = (int)Timeout,
CommandType = CommandType.Text
};
if (parms != null)
{
foreach (string key in parms.Keys)
{
cmd.Parameters.Add(key, parms[key]);
}
}
reader = new IDataReaderWrapper(cmd.ExecuteReader(CommandBehavior.SingleResult));
return(true);
}
catch (Exception ex)
{
LastError = ex.Message;
Logger.WriteLogExcept(LogTitle, ex);
Logger.WriteLog(LogTitle, sql);
reader = null;
return(false);
}
}
public RowMapperResultSetExtractor(IRowMapper rowMapper, int rowsExpected, IDataReaderWrapper dataReaderWrapper)
{
//TODO use datareaderwrapper
if (rowMapper == null)
{
throw new ArgumentNullException("rowMapper");
}
this.rowMapper = rowMapper;
this.rowsExpected = rowsExpected;
}
public RowMapperResultSetExtractor(IRowMapper rowMapper, int rowsExpected, IDataReaderWrapper dataReaderWrapper)
{
//TODO use datareaderwrapper
if (rowMapper == null)
{
throw new ArgumentNullException("rowMapper");
}
this.rowMapper = rowMapper;
this.rowsExpected = rowsExpected;
}
public static async Task <DataSet> ToDataSetAsync(IDataReaderWrapper dataReader)
{
DataSet dataSet = new DataSet();
do
{
DataTable dataTable = await ToDataTableAsync(dataReader);
dataSet.Tables.Add(dataTable);
}while (await dataReader.NextResultAsync());
return(dataSet);
}
public async static Task <DbSet> ToDbSetAsync(IDataReaderWrapper dataReader)
{
DbSet dbSet = new DbSet();
do
{
var dbTable = await ToDbTableAsync(dataReader);
dbSet.Tables.Add(dbTable);
}while (await dataReader.NextResultAsync());
return(dbSet);
}
public object ToSingle(RequestContext context, IDataReaderWrapper dataReader, Type targetType, bool isDispose = true)
{
try
{
dataReader.Read();
var rowParser = dataReader.GetRowParser(targetType);
return(rowParser(dataReader));
}
finally
{
Dispose(dataReader, isDispose);
}
}
public async Task <object> ToSingleAsync(RequestContext context, IDataReaderWrapper dataReader, Type targetType = null, bool isDispose = true)
{
try
{
await dataReader.ReadAsync();
var deser = _dataRowParserFactory.GetParser(dataReader, context, targetType);
return(deser(dataReader, context));
}
finally
{
Dispose(dataReader, isDispose);
}
}
public async Task <object> ToSingleAsync(RequestContext context, IDataReaderWrapper dataReader, Type targetType, bool isDispose = true)
{
try
{
await dataReader.ReadAsync();
var rowParser = dataReader.GetRowParser(targetType);
return(rowParser(dataReader));
}
finally
{
Dispose(dataReader, isDispose);
}
}
public async static Task <DbTable> ToDbTableAsync(IDataReaderWrapper dataReader)
{
DbTable dbTable = new DbTable();
InitDbTableColumns(dataReader, dbTable);
while (await dataReader.ReadAsync())
{
var dbRow = dbTable.AddRow();
for (int i = 0; i < dataReader.FieldCount; i++)
{
var colName = dataReader.GetName(i);
dbRow[colName] = dataReader[colName];
}
}
return(dbTable);
}
public async Task <IMultipleResult> FillMultipleAsync(RequestContext context, IMultipleResult multipleResult)
{
return(await ExecuteWrapAsync(async (dbSession) =>
{
IDataReaderWrapper dataReader = null;
try
{
dataReader = CommandExecuter.ExecuteReader(dbSession, context);
return await multipleResult.InitDataAsync(context, dataReader, _dataReaderDeserializer);
}
finally
{
DisposeReader(dataReader);
}
}, context, DataSourceChoice.Read));
}
public IMultipleResult FillMultiple(RequestContext context, IMultipleResult multipleResult)
{
return(ExecuteWrap((dbSession) =>
{
IDataReaderWrapper dataReader = null;
try
{
dataReader = CommandExecuter.ExecuteReader(dbSession, context);
return multipleResult.InitData(context, dataReader, _dataReaderDeserializer);
}
finally
{
DisposeReader(dataReader);
}
}, context, DataSourceChoice.Read));
}
public object ToSingle(RequestContext context, IDataReaderWrapper dataReader, Type targetType, bool isDispose = true)
{
try
{
if (dataReader.Read())
{
var deser = _dataRowParserFactory.GetParser(dataReader, context, targetType);
return(deser(dataReader, context));
}
return(null);
}
finally
{
Dispose(dataReader, isDispose);
}
}
public static async Task <DataTable> ToDataTableAsync(IDataReaderWrapper dataReader)
{
DataTable dataTable = new DataTable();
InitDataTableColumns(dataReader, dataTable);
while (await dataReader.ReadAsync())
{
DataRow dataRow = dataTable.NewRow();
for (int i = 0; i < dataReader.FieldCount; i++)
{
dataRow[i] = dataReader[i];
}
dataTable.Rows.Add(dataRow);
}
return(dataTable);
}
public Task <T> GetNestedAsync <T>(RequestContext context)
{
return(ExecuteWrapAsync <T>(async(dbSession) =>
{
IDataReaderWrapper dataReader = null;
try
{
dataReader = await CommandExecuter.ExecuteReaderAsync(dbSession, context);
return _nestedObjectConverter.ToNested <T>(context, dataReader, _dataReaderDeserializer);
}
finally
{
DisposeReader(dataReader);
}
}, context, DataSourceChoice.Read));
}
public async Task <DbSet> GetDbSetAsync(RequestContext context)
{
return(await ExecuteWrapAsync(async (dbSession) =>
{
IDataReaderWrapper dataReader = null;
try
{
dataReader = await CommandExecuter.ExecuteReaderAsync(dbSession, context);
return await DataReaderConvert.ToDbSetAsync(dataReader);
}
finally
{
DisposeReader(dataReader);
}
}, context, DataSourceChoice.Read));
}
public async Task <T> ToSingleAsync <T>(RequestContext context, IDataReaderWrapper dataReader, bool isDispose = true)
{
try
{
if (await dataReader.ReadAsync())
{
var targetType = typeof(T);
var rowParser = dataReader.GetRowParser(targetType);
return((T)rowParser(dataReader));
}
return(default(T));
}
finally
{
Dispose(dataReader, isDispose);
}
}
public async Task <T> ToSingleAsync <T>(RequestContext context, IDataReaderWrapper dataReader, bool isDispose = true)
{
try
{
var targetType = typeof(T);
if (await dataReader.ReadAsync())
{
var deser = _dataRowParserFactory.GetParser(dataReader, context, targetType);
object target = deser(dataReader, context);
return((T)target);
}
return(default(T));
}
finally
{
Dispose(dataReader, isDispose);
}
}
public IEnumerable <object> ToEnumerable(RequestContext context, IDataReaderWrapper dataReader, Type targetType, bool isDispose = true)
{
try
{
IList <object> list = new List <object>();
if (dataReader.Read())
{
var rowParser = dataReader.GetRowParser(targetType);
do
{
var target = rowParser(dataReader);
list.Add(target);
} while (dataReader.Read());
}
return(list);
}
finally
{
Dispose(dataReader, isDispose);
}
}
public IEnumerable <T> ToEnumerable <T>(RequestContext context, IDataReaderWrapper dataReader, bool isDispose = true)
{
try
{
IList <T> list = new List <T>();
var targetType = typeof(T);
if (dataReader.Read())
{
var deser = _dataRowParserFactory.GetParser(dataReader, context, targetType);
do
{
T target = (T)deser(dataReader, context);
list.Add(target);
} while (dataReader.Read());
}
return(list);
}
finally
{
Dispose(dataReader, isDispose);
}
}
public IMultipleResult InitData(RequestContext requestContext, IDataReaderWrapper dataReaderWrapper, IDataReaderDeserializer dataReaderDeserializer)
{
foreach (var resultMapKV in _resultDataMap)
{
var resultMap = resultMapKV.Value;
switch (resultMap.Type)
{
case ResultMap.ResultTypeType.Single:
{
resultMap.Result = dataReaderDeserializer.ToSingle(requestContext, dataReaderWrapper, resultMap.ResultType, false);
break;
}
case ResultMap.ResultTypeType.Enumerable:
{
resultMap.Result = dataReaderDeserializer.ToEnumerable(requestContext, dataReaderWrapper, resultMap.ResultType, false);
break;
}
}
dataReaderWrapper.NextResult();
}
return(this);
}
public T ToNested <T>(RequestContext context, IDataReaderWrapper dataReaderWrapper, IDataReaderDeserializer dataReaderDeserializer)
{
var convert = _nestedObjectConvertFactory.CreateNestedObjectConvert(context, typeof(T));
return((T)convert(context, dataReaderWrapper, dataReaderDeserializer));
}
private Func<IDataReader, RequestContext, object> CreateParserImpl(IDataReaderWrapper dataReader, RequestContext context, Type targetType)
{
var statement = context.Statement;
var resultMap = statement?.ResultMap;
resultMap = statement?.MultipleResultMap?.Results.FirstOrDefault(m => m.Index == dataReader.ResultIndex)?.Map ?? resultMap;
var constructorMap = resultMap?.Constructor;
var columns = Enumerable.Range(0, dataReader.FieldCount)
.Select(i => new { Index = i, Name = dataReader.GetName(i) })
.ToDictionary((col) => col.Name);
var dynamicMethod = new DynamicMethod("Deserialize" + Guid.NewGuid().ToString("N"), targetType, new[] { TypeUtils.DataReaderType, TypeUtils.RequestContextType }, targetType, true);
var iLGenerator = dynamicMethod.GetILGenerator();
iLGenerator.DeclareLocal(targetType);
ConstructorInfo targetCtor = null;
if (constructorMap == null)
{
targetCtor = targetType.GetConstructor(
BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, null, Type.EmptyTypes, null);
}
else
{
var ctorArgTypes = constructorMap.Args.Select(arg => arg.ArgType).ToArray();
targetCtor = targetType.GetConstructor(
BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, null, ctorArgTypes, null);
//load arg value
foreach (var arg in constructorMap.Args)
{
var col = columns[arg.Column];
EmitLoadColVal(iLGenerator, dataReader, col.Index, arg.TypeHandler, arg.ArgType, null);
}
}
if (targetCtor == null)
throw new SmartSqlException($"No parameterless constructor defined for the target type: \"{targetType.FullName}\"");
iLGenerator.Emit(OpCodes.Newobj, targetCtor); // [target]
iLGenerator.Emit(OpCodes.Stloc_0);
foreach (var col in columns)
{
var colName = col.Key;
var colIndex = col.Value.Index;
var result = resultMap?.Properties?.FirstOrDefault(r => r.Column == colName);
string propertyName = result != null ? result.Name : colName;
var property = targetType.GetProperty(propertyName);
if (property == null) { continue; }
if (!property.CanWrite) { continue; }
Type propertyType = property.PropertyType;
Label isDbNullLabel = iLGenerator.DefineLabel();
EmitLoadColVal(iLGenerator, dataReader, colIndex, result?.TypeHandler, propertyType, isDbNullLabel);
iLGenerator.Emit(OpCodes.Call, property.SetMethod);// stack is empty
iLGenerator.MarkLabel(isDbNullLabel);
}
iLGenerator.Emit(OpCodes.Ldloc_0);// stack is [rval]
iLGenerator.Emit(OpCodes.Ret);
var funcType = System.Linq.Expressions.Expression.GetFuncType(TypeUtils.DataReaderType, TypeUtils.RequestContextType, targetType);
return (Func<IDataReader, RequestContext, object>)dynamicMethod.CreateDelegate(funcType);
}
public RowMapperResultSetExtractor(IRowMapper <T> rowMapper, int rowsExpected, IDataReaderWrapper dataReaderWrapper)
{
//TODO use datareaderwrapper
AssertUtils.ArgumentNotNull(rowMapper, "rowMapper");
this.rowMapper = rowMapper;
this.rowsExpected = rowsExpected;
}
public RowMapperResultSetExtractor(RowMapperDelegate <T> rowMapperDelegate, int rowsExpected, IDataReaderWrapper dataReaderWrapper)
{
//TODO use datareaderwrapper
AssertUtils.ArgumentNotNull(rowMapperDelegate, "rowMapperDelegate");
this.rowMapperDelegate = rowMapperDelegate;
this.rowsExpected = rowsExpected;
}
public async Task <IEnumerable <T> > ToEnumerableAsync <T>(RequestContext context, IDataReaderWrapper dataReader, bool isDispose = true)
{
try
{
IList <T> list = new List <T>();
if (await dataReader.ReadAsync())
{
var targetType = typeof(T);
var rowParser = dataReader.GetRowParser(targetType);
do
{
var item = (T)rowParser(dataReader);
list.Add(item);
} while (await dataReader.ReadAsync());
}
return(list);
}
finally
{
Dispose(dataReader, isDispose);
}
}
public async Task <IEnumerable <object> > ToEnumerableAsync(RequestContext context, IDataReaderWrapper dataReader, Type targetType, bool isDispose = true)
{
try
{
IList <object> list = new List <object>();
if (await dataReader.ReadAsync())
{
var deser = _dataRowParserFactory.GetParser(dataReader, context, targetType);
do
{
var target = deser(dataReader, context);
list.Add(target);
} while (await dataReader.ReadAsync());
}
return(list);
}
finally
{
Dispose(dataReader, isDispose);
}
}
public RowMapperResultSetExtractor(RowMapperDelegate rowMapperDelegate, int rowsExpected, IDataReaderWrapper dataReaderWrapper)
{
//TODO use datareaderwrapper
this.rowMapperDelegate = rowMapperDelegate ?? throw new ArgumentNullException(nameof(rowMapperDelegate));
this.rowsExpected = rowsExpected;
}
