/// <summary>
/// Creates and returns a new DbConnection.
/// </summary>
/// <param name="builder">The DbConnectionStringBuilder containing the connection string.</param>
/// <returns>A closed DbConnection.</returns>
public static DbConnection Connection(this DbConnectionStringBuilder builder)
{
if (builder == null)
{
throw new ArgumentNullException("builder");
}
DbConnection connection = null;
DbConnection disposable = null;
try
{
// get the connection from the provider
connection = InsightDbProvider.For(builder).CreateDbConnection();
disposable = connection;
if (connection == null)
{
throw new ArgumentException("Cannot determine the type of connection from the ConnectionStringBuilder", "builder");
}
connection.ConnectionString = builder.ConnectionString;
disposable = null;
return(connection);
}
finally
{
if (disposable != null)
{
disposable.Dispose();
}
}
}
/// <summary>
/// Create a parameter generator for a dynamic object.
/// </summary>
/// <param name="command">The command to parse.</param>
/// <returns>An action that fills in the command parameters from a dynamic object.</returns>
private static Action <IDbCommand, object> CreateDynamicInputParameterGenerator(IDbCommand command)
{
var provider = InsightDbProvider.For(command);
var parameters = provider.DeriveParameters(command);
return((cmd, o) =>
{
// make sure that we have a dictionary implementation
IDictionary <string, object> dyn = o as IDictionary <string, object>;
if (dyn == null)
{
throw new InvalidOperationException("Dynamic object must support IDictionary<string, object>.");
}
foreach (var template in parameters)
{
var p = provider.CloneParameter(cmd, template);
// get the value from the object, converting null to db null
// note that if the dictionary does not have the value, we leave the value null and then the parameter gets defaulted
object value = null;
if (dyn.TryGetValue(p.ParameterName, out value))
{
if (value == null)
{
value = DBNull.Value;
}
else
{
DbType sqlType = LookupDbType(value.GetType(), null, p.DbType);
if (sqlType == DbTypeEnumerable)
{
cmd.Parameters.Add(p);
ListParameterHelper.ConvertListParameter(p, value, cmd);
continue;
}
}
}
p.Value = value;
// if it's a string, fill in the length
IDbDataParameter dbDataParameter = p as IDbDataParameter;
if (dbDataParameter != null)
{
dbDataParameter.Size = GetStringParameterLength(value as String, command.CommandType, dbDataParameter.DbType);
}
// explicitly set the type of the parameter
if (value != null && _typeToDbTypeMap.ContainsKey(value.GetType()))
{
dbDataParameter.DbType = _typeToDbTypeMap[value.GetType()];
}
provider.FixupParameter(cmd, p, p.DbType, dyn.GetType(), SerializationMode.Default);
cmd.Parameters.Add(p);
}
});
}
/// <summary>
/// Gets the serializer for a specific parameter.
/// </summary>
/// <param name="command">The command that is being bound.</param>
/// <param name="parameter">The parameter that is being bound.</param>
/// <param name="prop">The property that is being bound.</param>
/// <returns>The serializer.</returns>
internal static IDbObjectSerializer GetSerializer(IDbCommand command, IDataParameter parameter, ClassPropInfo prop)
{
if (InsightDbProvider.For(parameter).IsXmlParameter(command, parameter))
{
return(XmlObjectSerializer.Serializer);
}
return(EvaluateRules(prop));
}
/// <summary>
/// Gets the serializer for a specific parameter.
/// </summary>
/// <param name="reader">The reader that is being bound.</param>
/// <param name="column">The index of the column that is being bound.</param>
/// <param name="prop">The property that is being bound.</param>
/// <returns>The serializer.</returns>
internal static IDbObjectSerializer GetSerializer(IDataReader reader, int column, ClassPropInfo prop)
{
if (InsightDbProvider.For(reader).IsXmlColumn(reader.GetSchemaTable(), column))
{
return(XmlObjectSerializer.Serializer);
}
return(EvaluateRules(prop));
}
/// <inheritdoc/>
public override IDbConnection CloneDbConnection(IDbConnection connection)
{
if (connection == null) throw new ArgumentNullException("connection");
// clone the inner connection
var reliable = (ReliableConnection)connection;
var innerConnection = GetInnerConnection(connection);
var innerProvider = InsightDbProvider.For(innerConnection);
var clonedInnerConnection = innerProvider.CloneDbConnection(innerConnection);
return new ReliableConnection((DbConnection)clonedInnerConnection, reliable.RetryStrategy);
}
/// <summary>
/// Create a parameter generator for a dynamic object.
/// </summary>
/// <param name="command">The command to parse.</param>
/// <returns>An action that fills in the command parameters from a dynamic object.</returns>
static Action <IDbCommand, object> CreateDynamicInputParameterGenerator(IDbCommand command)
{
var provider = InsightDbProvider.For(command);
var parameters = provider.DeriveParameters(command);
return((cmd, o) =>
{
// make sure that we have a dictionary implementation
IDictionary <string, object> dyn = o as IDictionary <string, object>;
if (dyn == null)
{
throw new InvalidOperationException("Dynamic object must support IDictionary<string, object>.");
}
foreach (var template in parameters)
{
var p = provider.CloneParameter(command, template);
// get the value from the object, converting null to db null
// note that if the dictionary does not have the value, we leave the value null and then the parameter gets defaulted
object value = null;
if (dyn.TryGetValue(p.ParameterName, out value) && value == null)
{
value = DBNull.Value;
}
p.Value = value;
// if it's a string, fill in the length
IDbDataParameter dbDataParameter = p as IDbDataParameter;
if (dbDataParameter != null)
{
string s = value as string;
if (s != null)
{
int length = s.Length;
if (length > 4000)
{
length = -1;
}
dbDataParameter.Size = length;
}
}
// explicitly set the type of the parameter
if (value != null && _typeToDbTypeMap.ContainsKey(value.GetType()))
{
dbDataParameter.DbType = _typeToDbTypeMap[value.GetType()];
}
cmd.Parameters.Add(p);
}
});
}
/// <summary>
/// Add parameters to a given command.
/// </summary>
/// <param name="cmd">The command to add parameters to.</param>
/// <param name="parameters">The object containing parameters to add.</param>
public static void AddParameters(this IDbCommand cmd, object parameters = null)
{
// fill in a null parameter with empty parameter
if (parameters == null)
{
parameters = Parameters.Empty;
}
DbParameterGenerator.GetInputParameterGenerator(cmd, parameters.GetType())(cmd, parameters);
InsightDbProvider.For(cmd).FixupCommand(cmd);
}
/// <inheritdoc/>
public override IDbConnection CloneDbConnection(IDbConnection connection)
{
if (connection == null)
{
throw new ArgumentNullException("connection");
}
// clone the inner connection
var innerConnection = GetInnerConnection(connection);
var innerProvider = InsightDbProvider.For(innerConnection);
var clonedInnerConnection = (DbConnection)innerProvider.CloneDbConnection(innerConnection);
return(new GlimpseDbConnection(clonedInnerConnection));
}
/// <summary>
/// Determines if an exception is a transient error.
/// </summary>
/// <param name="exception">The exception to test.</param>
/// <returns>True if the exception is a transient error, false if the command should not be retried.</returns>
public virtual bool IsTransientException(Exception exception)
{
InsightDbProvider provider;
try
{
provider = InsightDbProvider.For(exception);
}
catch (NotImplementedException)
{
// if the provider lookup fails, then this can't be a transient exception
return(false);
}
return(provider.IsTransientException(exception));
}
/// <summary>
/// Derive the parameters that are needed to execute a given command.
/// </summary>
/// <param name="cmd">The command to execute.</param>
private void DeriveParameters(IDbCommand cmd)
{
var provider = InsightDbProvider.For(cmd);
// look in the concurrent dictionary to find the parameters.
// if not found, call the Server to get them.
var parameterList = _parameters.GetOrAdd(
cmd.CommandText,
name => provider.DeriveParameters(cmd).ToList());
// copy the parameter list
foreach (IDataParameter parameter in parameterList)
{
cmd.Parameters.Add(provider.CloneParameter(cmd, parameter));
}
}
private ObjectReader(IDbCommand command, Type type, IDataReader reader)
{
var provider = InsightDbProvider.For(command);
_columns = new List <ColumnInfo>();
var accessors = new List <Func <object, object> >();
// create a mapping, and only keep mappings that match our modified schema
var sourceMappings = ColumnMapping.MapColumns(type, reader).ToList();
var sourceColumns = ColumnInfo.FromDataReader(reader);
IsAtomicType = TypeHelper.IsAtomicType(type);
if (!IsAtomicType)
{
int columnCount = sourceMappings.Count;
for (int i = 0; i < columnCount; i++)
{
var mapping = sourceMappings[i];
var column = sourceColumns[i];
if (column.IsReadOnly && !column.IsIdentity)
{
continue;
}
_columns.Add(column);
if (mapping == null)
{
accessors.Add(null);
}
else
{
accessors.Add(GenerateAccessor(type, mapping, column));
}
}
}
else
{
var column = sourceColumns.First();
_columns.Add(column);
accessors.Add(GenerateAccessor(type, null, column));
}
_accessors = accessors.ToArray();
}
/// <summary>
/// Initialize the serializer on the given mapping.
/// </summary>
/// <param name="mapping">The mapping being evaluated.</param>
/// <param name="reader">The reader being evaluated.</param>
/// <param name="command">The command being evaluated.</param>
/// <param name="parameters">The parameters being evaluated.</param>
/// <param name="i">The index of the parameter being evaluated.</param>
private static void InitializeMappingSerializer(ColumnMappingEventArgs mapping, IDataReader reader, IDbCommand command, IList <IDataParameter> parameters, int i)
{
// if the provider knows that this is an xml field, then automatically use that
if ((command != null && InsightDbProvider.For(command).IsXmlParameter(command, parameters[i])) ||
(reader != null && InsightDbProvider.For(reader).IsXmlColumn(command, reader.GetSchemaTable(), i)))
{
mapping.SerializationMode = SerializationMode.Xml;
mapping.Serializer = typeof(XmlObjectSerializer);
}
else
{
mapping.SerializationMode = mapping.SerializationMode ?? mapping.ClassPropInfo.SerializationMode;
switch (mapping.SerializationMode)
{
default:
case SerializationMode.Default:
mapping.Serializer = ColumnMapping.DefaultObjectSerializer;
break;
case SerializationMode.Xml:
mapping.Serializer = typeof(XmlObjectSerializer);
break;
case SerializationMode.Json:
mapping.Serializer = JsonObjectSerializer.SerializerType;
break;
case SerializationMode.ToString:
mapping.Serializer = typeof(ToStringObjectSerializer);
break;
case SerializationMode.Custom:
mapping.Serializer = mapping.Serializer ?? mapping.ClassPropInfo.Serializer ?? ColumnMapping.DefaultObjectSerializer;
break;
}
}
// if we allow atomic types to get a different serializer, then there are certain situations where we can't figure out the right thing to do
if (mapping.SerializationMode != SerializationMode.Default && TypeHelper.IsAtomicType(mapping.ClassPropInfo.MemberType) && mapping.ClassPropInfo.MemberType != typeof(string))
{
throw new InvalidOperationException(String.Format(CultureInfo.InvariantCulture, "Atomic types cannot have a column serializer: {0}.{1}", mapping.ClassPropInfo.Type.Name, mapping.ClassPropInfo.Name));
}
}
/// <summary>
/// Takes the output parameters of a result set and inserts them into the result object.
/// </summary>
/// <typeparam name="T">The type of object to return.</typeparam>
/// <param name="command">The command to evaluate.</param>
/// <param name="result">The result to insert into.</param>
/// <returns>The object that was filled in.</returns>
public static T OutputParameters <T>(this IDbCommand command, T result)
{
if (command == null)
{
throw new ArgumentNullException("command");
}
// if there is no output object, don't attempt to fill it in
if (result == null)
{
return(result);
}
InsightDbProvider.For(command).FixupOutputParameters(command);
if (result is DynamicObject)
{
// handle dynamic objects by assigning their properties right into the dictionary
IDictionary <string, object> dictionary = result as IDictionary <string, object>;
if (dictionary == null)
{
throw new InvalidOperationException("Dynamic object must support IDictionary<string, object>.");
}
foreach (IDataParameter p in command.Parameters)
{
if (p.Direction.HasFlag(ParameterDirection.Output))
{
dictionary[p.ParameterName] = p.Value;
}
}
}
else
{
DbParameterGenerator.GetOutputParameterConverter(command, result.GetType())(command, result);
}
return(result);
}
/// <summary>
/// Registers this provider. This is generally not needed, unless you want to force an assembly reference to this provider.
/// </summary>
public static void RegisterProvider()
{
InsightDbProvider.RegisterProvider(new PostgreSQLInsightDbProvider());
}
static Action <IDbCommand, object> CreateClassInputParameterGenerator(IDbCommand command, Type type)
{
var provider = InsightDbProvider.For(command);
var parameters = provider.DeriveParameters(command);
// special case if the parameters object is an IEnumerable or Array
// look for the parameter that is a Structured object and pass the array to the TVP
// note that string supports ienumerable, so exclude atomic types
var enumerable = type.GetInterfaces().FirstOrDefault(i => i.IsGenericType && i.GetGenericTypeDefinition() == typeof(IEnumerable <>));
if (enumerable != null && type != typeof(string) && parameters.OfType <IDataParameter>().Where(p => p.Direction.HasFlag(ParameterDirection.Input)).Count() == 1)
{
return((IDbCommand cmd, object o) =>
{
// don't use the provider above. The command may be unwrapped by the time we get back here
var tableParameter = InsightDbProvider.For(cmd).CloneParameter(cmd, parameters.OfType <IDataParameter>().Single(p => p.Direction.HasFlag(ParameterDirection.Input)));
cmd.Parameters.Add(tableParameter);
ListParameterHelper.AddListParameter(tableParameter, o, cmd);
});
}
// get the mapping of the properties for the type
var mappings = ColumnMapping.Parameters.CreateMapping(type, null, command, parameters, null, 0, parameters.Count, true);
// start creating a dynamic method
Type typeOwner = type.HasElementType ? type.GetElementType() : type;
var dm = new DynamicMethod(String.Format(CultureInfo.InvariantCulture, "CreateInputParameters-{0}", Guid.NewGuid()), null, new[] { typeof(IDbCommand), typeof(object) }, typeOwner, true);
var il = dm.GetILGenerator();
// copy the parameters into the command object
var parametersLocal = il.DeclareLocal(typeof(IDataParameter[]));
new StaticFieldStorage(provider).EmitLoad(il);
il.Emit(OpCodes.Ldarg_0);
new StaticFieldStorage(parameters).EmitLoad(il);
il.Emit(OpCodes.Call, typeof(InsightDbProvider).GetMethod("CopyParameters", BindingFlags.NonPublic | BindingFlags.Instance));
il.Emit(OpCodes.Stloc, parametersLocal);
// go through all of the mappings
for (int i = 0; i < mappings.Length; i++)
{
var mapping = mappings[i];
var dbParameter = parameters[i];
// if there is no mapping for the parameter
if (mapping == null)
{
// sql will silently eat table parameters that are not specified, and that can be difficult to debug
if (provider.IsTableValuedParameter(command, dbParameter))
{
throw new InvalidOperationException(String.Format(CultureInfo.InvariantCulture, "Table parameter {0} must be specified", dbParameter.ParameterName));
}
// unspecified input parameters get skipped
if (dbParameter.Direction == ParameterDirection.Input)
{
parameters[i] = null;
}
continue;
}
// get the parameter
il.Emit(OpCodes.Ldloc, parametersLocal);
il.Emit(OpCodes.Ldc_I4, i);
il.Emit(OpCodes.Ldelem, typeof(IDataParameter));
var prop = mapping.ClassPropInfo;
// look up the best type to use for the parameter
DbType sqlType = LookupDbType(mapping, dbParameter.DbType);
// give the provider an opportunity to fix up the template parameter (e.g. set UDT type names)
provider.FixupParameter(command, dbParameter, sqlType, prop.MemberType);
///////////////////////////////////////////////////////////////
// We have a parameter, start handling all of the other types
///////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////
// Get the value from the object onto the stack
///////////////////////////////////////////////////////////////
il.Emit(OpCodes.Ldarg_1);
prop.EmitGetValue(il);
///////////////////////////////////////////////////////////////
// Special case support for enumerables. If the type is -1 (our workaround, then call the list parameter method)
///////////////////////////////////////////////////////////////
if (sqlType == DbTypeEnumerable)
{
// we have the parameter and the value as object, add the command
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Call, typeof(ListParameterHelper).GetMethod("AddListParameter", BindingFlags.Static | BindingFlags.NonPublic));
continue;
}
// if this is a value type, then box the value so the compiler can check the type and we can call methods on it
if (prop.MemberType.IsValueType)
{
il.Emit(OpCodes.Box, prop.MemberType);
}
// special conversions for timespan to datetime
if ((sqlType == DbType.Time && dbParameter.DbType != DbType.Time) ||
(dbParameter.DbType == DbType.DateTime || dbParameter.DbType == DbType.DateTime2 || dbParameter.DbType == DbType.DateTimeOffset))
{
IlHelper.EmitLdInt32(il, (int)dbParameter.DbType);
il.Emit(OpCodes.Call, typeof(TypeConverterGenerator).GetMethod("ObjectToSqlDateTime"));
}
// if it's class type, boxed value type (in an object), or nullable, then we have to check for null
Label readyToSetLabel = il.DefineLabel();
if (!prop.MemberType.IsValueType || Nullable.GetUnderlyingType(prop.MemberType) != null)
{
Label notNull = il.DefineLabel();
// check to see if it's not null
il.Emit(OpCodes.Dup);
il.Emit(OpCodes.Brtrue_S, notNull);
// it's null. replace the value with DbNull
il.Emit(OpCodes.Pop);
il.Emit(OpCodes.Ldsfld, _dbNullValue);
// value is set to null. ready to set the property.
il.Emit(OpCodes.Br_S, readyToSetLabel);
// we know the value is not null
il.MarkLabel(notNull);
}
///////////////////////////////////////////////////////////////
// if this is a linq binary, convert it to a byte array
///////////////////////////////////////////////////////////////
if (prop.MemberType == TypeHelper.LinqBinaryType)
{
il.Emit(OpCodes.Callvirt, TypeHelper.LinqBinaryToArray);
}
else if (prop.MemberType == typeof(XmlDocument))
{
// we are sending up an XmlDocument. ToString just returns the classname, so use the outerxml.
il.Emit(OpCodes.Callvirt, prop.MemberType.GetProperty("OuterXml").GetGetMethod());
}
else if (prop.MemberType == typeof(XDocument))
{
// we are sending up an XDocument. Use ToString.
il.Emit(OpCodes.Callvirt, prop.MemberType.GetMethod("ToString", new Type[] { }));
}
else if (prop.MemberType.GetInterfaces().Contains(typeof(IConvertible)) || prop.MemberType == typeof(object))
{
// if the type supports IConvertible, then let SQL convert it
// if the type is object, we can't do anything, so let SQL attempt to convert it
}
else if (!TypeHelper.IsAtomicType(prop.MemberType))
{
if (mapping.Serializer != null)
{
var serializerMethod = mapping.Serializer.GetMethod("Serialize", BindingFlags.Public | BindingFlags.Static, null, new Type[] { typeof(object), typeof(Type) }, null);
if (serializerMethod == null)
{
throw new InvalidOperationException(String.Format(CultureInfo.InvariantCulture, "Serializer type {0} needs the method 'public static string Serialize(object, Type)'", mapping.Serializer.Name));
}
il.EmitLoadType(prop.MemberType);
il.Emit(OpCodes.Call, serializerMethod);
}
else if (dbParameter.DbType != DbType.Object)
{
// it's not a system type and it's not IConvertible, so let's add it as a string and let the data engine convert it.
il.Emit(OpCodes.Callvirt, prop.MemberType.GetMethod("ToString", new Type[] { }));
}
// if we touched the value, it's possible that serializing returns a null
if (dbParameter.DbType != DbType.Object)
{
Label internalValueIsNotNull = il.DefineLabel();
// check to see if it's not null
il.Emit(OpCodes.Dup);
il.Emit(OpCodes.Brtrue_S, internalValueIsNotNull);
// it's null. replace the value with DbNull
il.Emit(OpCodes.Pop);
il.Emit(OpCodes.Ldsfld, _dbNullValue);
il.MarkLabel(internalValueIsNotNull);
}
}
///////////////////////////////////////////////////////////////
// p.Value = value
///////////////////////////////////////////////////////////////
// push parameter is at top of method
// value is above
il.MarkLabel(readyToSetLabel);
if (prop.MemberType == typeof(string))
{
il.Emit(OpCodes.Call, typeof(DbParameterGenerator).GetMethod("SetParameterStringValue", BindingFlags.NonPublic | BindingFlags.Static));
}
else
{
il.Emit(OpCodes.Callvirt, _iDataParameterSetValue);
}
}
il.Emit(OpCodes.Ret);
return((Action <IDbCommand, object>)dm.CreateDelegate(typeof(Action <IDbCommand, object>)));
}
/// <summary>
/// Registers this provider. This is generally not needed, unless you want to force an assembly reference to this provider.
/// </summary>
public static void RegisterProvider()
{
InsightDbProvider.RegisterProvider(new MiniProfilerInsightDbProvider());
}
private static Action <IDbCommand, object> CreateClassInputParameterGenerator(IDbCommand command, Type type)
{
var provider = InsightDbProvider.For(command);
var parameters = provider.DeriveParameters(command);
// special case if the parameters object is an IEnumerable or Array
// look for the parameter that is a Structured object and pass the array to the TVP
// note that string supports ienumerable, so exclude atomic types
var enumerable = type.GetInterfaces().FirstOrDefault(i => i.GetTypeInfo().IsGenericType&& i.GetGenericTypeDefinition() == typeof(IEnumerable <>));
if (enumerable != null && type != typeof(string) && parameters.OfType <IDataParameter>().Where(p => p.Direction.HasFlag(ParameterDirection.Input)).Count() == 1)
{
return((IDbCommand cmd, object o) =>
{
// don't use the provider above. The command may be unwrapped by the time we get back here
var tableParameter = InsightDbProvider.For(cmd).CloneParameter(cmd, parameters.OfType <IDataParameter>().Single(p => p.Direction.HasFlag(ParameterDirection.Input)));
cmd.Parameters.Add(tableParameter);
ListParameterHelper.ConvertListParameter(tableParameter, o, cmd);
});
}
// get the mapping of the properties for the type
var mappings = ColumnMapping.MapParameters(type, command, parameters);
// start creating a dynamic method
Type typeOwner = type.HasElementType ? type.GetElementType() : type;
var dm = new DynamicMethod(String.Format(CultureInfo.InvariantCulture, "CreateInputParameters-{0}", Guid.NewGuid()), null, new[] { typeof(IDbCommand), typeof(object) }, typeOwner, true);
var il = dm.GetILGenerator();
// copy the parameters into the command object
var parametersLocal = il.DeclareLocal(typeof(IDataParameter[]));
StaticFieldStorage.EmitLoad(il, provider);
il.Emit(OpCodes.Ldarg_0);
StaticFieldStorage.EmitLoad(il, parameters);
il.Emit(OpCodes.Call, typeof(InsightDbProvider).GetMethod("CopyParameters", BindingFlags.NonPublic | BindingFlags.Instance));
il.Emit(OpCodes.Stloc, parametersLocal);
// go through all of the mappings
for (int i = 0; i < mappings.Count; i++)
{
var mapping = mappings[i];
var dbParameter = parameters[i];
// if there is no mapping for the parameter
if (mapping == null)
{
// sql will silently eat table parameters that are not specified, and that can be difficult to debug
if (provider.IsTableValuedParameter(command, dbParameter))
{
throw new InvalidOperationException(String.Format(CultureInfo.InvariantCulture, "Table parameter {0} must be specified", dbParameter.ParameterName));
}
// unspecified input parameters get skipped
if (dbParameter.Direction == ParameterDirection.Input)
{
parameters[i] = null;
}
continue;
}
var memberType = mapping.Member.MemberType;
var serializer = mapping.Serializer;
// get the parameter
il.Emit(OpCodes.Ldloc, parametersLocal);
il.Emit(OpCodes.Ldc_I4, i);
il.Emit(OpCodes.Ldelem, typeof(IDataParameter));
// look up the best type to use for the parameter
DbType sqlType = LookupDbType(memberType, serializer, dbParameter.DbType);
// give the provider an opportunity to fix up the template parameter (e.g. set UDT type names)
provider.FixupParameter(command, dbParameter, sqlType, memberType, mapping.Member.SerializationMode);
// give a chance to override the best guess parameter
DbType overriddenSqlType = sqlType;
if (sqlType != DbTypeEnumerable)
{
overriddenSqlType = ColumnMapping.MapParameterDataType(memberType, command, dbParameter, sqlType);
}
///////////////////////////////////////////////////////////////
// We have a parameter, start handling all of the other types
///////////////////////////////////////////////////////////////
if (overriddenSqlType != sqlType)
{
sqlType = overriddenSqlType;
dbParameter.DbType = sqlType;
}
///////////////////////////////////////////////////////////////
// Get the value from the object onto the stack
///////////////////////////////////////////////////////////////
il.Emit(OpCodes.Ldarg_1);
if (type.GetTypeInfo().IsValueType)
{
il.Emit(OpCodes.Unbox_Any, type);
}
///////////////////////////////////////////////////////////////
// Special case support for enumerables. If the type is -1 (our workaround, then call the list parameter method)
///////////////////////////////////////////////////////////////
if (sqlType == DbTypeEnumerable)
{
// we have the parameter and the value as object, add the command
ClassPropInfo.EmitGetValue(type, mapping.PathToMember, il);
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Call, typeof(ListParameterHelper).GetMethod("ConvertListParameter", BindingFlags.Static | BindingFlags.NonPublic));
continue;
}
Label readyToSetLabel = il.DefineLabel();
ClassPropInfo.EmitGetValue(type, mapping.PathToMember, il, readyToSetLabel);
// special conversions for timespan to datetime
if ((sqlType == DbType.Time && dbParameter.DbType != DbType.Time) ||
(dbParameter.DbType == DbType.DateTime || dbParameter.DbType == DbType.DateTime2 || dbParameter.DbType == DbType.DateTimeOffset))
{
IlHelper.EmitLdInt32(il, (int)dbParameter.DbType);
il.Emit(OpCodes.Call, typeof(TypeConverterGenerator).GetMethod("ObjectToSqlDateTime"));
}
// if it's class type, boxed value type (in an object), or nullable, then we have to check for null
var nullableUnderlyingType = Nullable.GetUnderlyingType(memberType);
if (!memberType.GetTypeInfo().IsValueType || nullableUnderlyingType != null)
{
Label notNull = il.DefineLabel();
// check to see if it's not null
il.Emit(OpCodes.Dup);
il.Emit(OpCodes.Brtrue, notNull);
// it's null. replace the value with DbNull
il.Emit(OpCodes.Pop);
il.Emit(OpCodes.Ldsfld, _dbNullValue);
// value is set to null. ready to set the property.
il.Emit(OpCodes.Br, readyToSetLabel);
// we know the value is not null
il.MarkLabel(notNull);
}
// some providers (notably npgsql > 4.0) don't convert enums to ints, so we do it for them
if ((memberType != null && memberType.GetTypeInfo() != null && memberType.GetTypeInfo().IsEnum) ||
(nullableUnderlyingType != null && nullableUnderlyingType.GetTypeInfo() != null && nullableUnderlyingType.GetTypeInfo().IsEnum))
{
var enumType = nullableUnderlyingType ?? memberType;
// ClassPropInfo.EmitGetValue has the enum boxed, so unbox, cast, and re-box
switch (dbParameter.DbType)
{
case DbType.Int16:
il.Emit(OpCodes.Unbox_Any, enumType);
il.Emit(OpCodes.Conv_I2);
il.Emit(OpCodes.Box, typeof(Int16));
break;
case DbType.Int32:
il.Emit(OpCodes.Unbox_Any, enumType);
il.Emit(OpCodes.Conv_I4);
il.Emit(OpCodes.Box, typeof(Int32));
break;
case DbType.Int64:
il.Emit(OpCodes.Unbox_Any, enumType);
il.Emit(OpCodes.Conv_I8);
il.Emit(OpCodes.Box, typeof(Int64));
break;
}
}
///////////////////////////////////////////////////////////////
// if this is a linq binary, convert it to a byte array
///////////////////////////////////////////////////////////////
if (memberType == TypeHelper.LinqBinaryType)
{
il.Emit(OpCodes.Callvirt, TypeHelper.LinqBinaryToArray);
}
else if (memberType == typeof(XmlDocument))
{
// we are sending up an XmlDocument. ToString just returns the classname, so use the outerxml.
il.Emit(OpCodes.Callvirt, memberType.GetProperty("OuterXml").GetGetMethod());
}
else if (memberType == typeof(XDocument))
{
// we are sending up an XDocument. Use ToString.
il.Emit(OpCodes.Callvirt, memberType.GetMethod("ToString", new Type[] { }));
}
else if (serializer != null && serializer.CanSerialize(memberType, sqlType))
{
il.EmitLoadType(memberType);
StaticFieldStorage.EmitLoad(il, serializer);
il.Emit(OpCodes.Call, typeof(DbParameterGenerator).GetMethod("SerializeParameterValue", BindingFlags.NonPublic | BindingFlags.Static));
}
///////////////////////////////////////////////////////////////
// p.Value = value
///////////////////////////////////////////////////////////////
// push parameter is at top of method
// value is above
il.MarkLabel(readyToSetLabel);
if (memberType == typeof(string))
{
il.Emit(OpCodes.Call, typeof(DbParameterGenerator).GetMethod("SetParameterStringValue", BindingFlags.NonPublic | BindingFlags.Static));
}
else if ((memberType == typeof(Guid?) || (memberType == typeof(Guid))) && dbParameter.DbType != DbType.Guid && command.CommandType == CommandType.StoredProcedure)
{
il.Emit(OpCodes.Call, typeof(DbParameterGenerator).GetMethod("SetParameterGuidValue", BindingFlags.NonPublic | BindingFlags.Static));
}
else
{
il.Emit(OpCodes.Callvirt, _iDataParameterSetValue);
}
}
il.Emit(OpCodes.Ret);
return((Action <IDbCommand, object>)dm.CreateDelegate(typeof(Action <IDbCommand, object>)));
}
protected internal object DoInvokeMember(InvokeMemberBinder binder, object[] args, Type returnType)
{
if (binder == null)
{
throw new ArgumentNullException("binder");
}
if (args == null)
{
throw new ArgumentNullException("args");
}
bool doAsync = false;
IDbCommand cmd = null;
int specialParameters = 0;
int? timeout = null;
IDbTransaction transaction = null;
IQueryReader returns = null;
object outputParameters = null;
CancellationToken cancellationToken = CancellationToken.None;
CallInfo callInfo = binder.CallInfo;
int unnamedParameterCount = callInfo.ArgumentCount - callInfo.ArgumentNames.Count;
// check the proc name - if it ends with Async, then call it asynchronously and return the results
string procName = binder.Name;
if (procName.EndsWith("async", StringComparison.OrdinalIgnoreCase))
{
procName = procName.Substring(0, procName.Length - 5);
doAsync = true;
}
// if there is a schema, use it
if (!String.IsNullOrWhiteSpace(_schema))
{
procName = _schema + "." + procName;
}
// go through the arguments and look for our special arguments
// NOTE: this is intentionally case-sensitive so that you can use other cases if you need to pass a parameter by the same name.
var argumentNames = callInfo.ArgumentNames;
for (int i = 0; i < argumentNames.Count; i++)
{
switch (argumentNames[i])
{
case "cancellationToken":
cancellationToken = (CancellationToken)args[i + unnamedParameterCount];
specialParameters++;
break;
case "transaction":
transaction = (IDbTransaction)args[i + unnamedParameterCount];
specialParameters++;
break;
case "commandTimeout":
timeout = (int)args[i + unnamedParameterCount];
specialParameters++;
break;
case "returnType":
returnType = (Type)args[i + unnamedParameterCount];
specialParameters++;
break;
case "returns":
returns = (IQueryReader)args[i + unnamedParameterCount];
specialParameters++;
break;
case "outputParameters":
outputParameters = args[i + unnamedParameterCount];
specialParameters++;
break;
#if !NOCOMPATIBILITY
case "withGraph":
{
var withGraph = (Type)args[i + unnamedParameterCount];
dynamic graph = System.Activator.CreateInstance(withGraph);
returns = graph.GetListReader();
specialParameters++;
break;
}
case "withGraphs":
{
var types = (Type[])args[i + unnamedParameterCount];
returns = (IQueryReader)types[0].GetMethod("GetDefinitionFromGraphArray", BindingFlags.Static | BindingFlags.NonPublic | BindingFlags.FlattenHierarchy).Invoke(null, new object[] { returnType, types });
specialParameters++;
break;
}
#endif
}
}
try
{
// if there is exactly one unnamed parameter, and the named parameters are all special parameters, and it's a reference type (and not a string)
// then we will attempt to use the object's fields as the parameter values
// this is so you can send an entire object to an insert method
if (unnamedParameterCount == 1 &&
(callInfo.ArgumentNames.Count == specialParameters) &&
!args[0].GetType().IsValueType&& args[0].GetType() != typeof(String))
{
cmd = _connection.CreateCommand(procName, args[0], CommandType.StoredProcedure, timeout, transaction);
}
else
{
// this isn't a single-object parameter, so we are going to map the parameters by position and by name
// create a command
cmd = _connection.CreateCommand();
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = procName;
if (timeout.HasValue)
{
cmd.CommandTimeout = timeout.Value;
}
// unwrap the transaction because the transaction has to match the command and connection
if (transaction != null)
{
cmd.Transaction = DBConnectionExtensions.UnwrapDbTransaction(transaction);
}
// fill in the parameters for the command object
// we will do the values next
DeriveParameters(cmd);
// look at the unnamed parameters first. we will add them by position.
var inputParameters = cmd.Parameters.OfType <IDataParameter>().Where(p => p.Direction.HasFlag(ParameterDirection.Input)).ToList();
for (int i = 0; i < unnamedParameterCount; i++)
{
inputParameters[i].Value = args[i];
}
// go through all of the named arguments next. Note that they may overwrite indexed parameters.
for (int i = unnamedParameterCount; i < callInfo.ArgumentNames.Count; i++)
{
string argumentName = callInfo.ArgumentNames[i];
// ignore our special parameters
if (argumentName == "cancellationToken" ||
argumentName == "transaction" ||
argumentName == "commandTimeout" ||
argumentName == "returnType" ||
argumentName == "returns" ||
#if !NOCOMPATIBILITY
argumentName == "withGraph" ||
argumentName == "withGraphs" ||
#endif
argumentName == "outputParameters")
{
continue;
}
IDataParameter p = cmd.Parameters.OfType <IDataParameter>().First(parameter => String.Equals(parameter.ParameterName, argumentName, StringComparison.OrdinalIgnoreCase));
p.Value = args[i];
}
// special handling for table parameters - replace them with list parameters
// note that we may be modifying the parameters collection, so we copy the list here
var provider = InsightDbProvider.For(cmd);
foreach (var p in cmd.Parameters.OfType <IDataParameter>().Where(p => provider.IsTableValuedParameter(cmd, p)).ToList())
{
// if any parameters are missing table parameters, then alert the developer
if (p.Value == null)
{
throw new InvalidOperationException(String.Format(CultureInfo.InvariantCulture, "Table parameter {0} must be specified", p.ParameterName));
}
// convert the value to an objectreader
DbParameterGenerator.ListParameterHelper.ConvertListParameter(p, p.Value, cmd);
}
}
// if we don't have a type, use FastExpando
if (returnType == null)
{
returnType = typeof(FastExpando);
}
// if there was no named returns definition, check for an unnamed IQueryParameter
if (returns == null)
{
returns = args.OfType <IQueryReader>().FirstOrDefault();
}
// if there is no returns definition supplied, get one from the return type
if (returns == null)
{
if (returnType.IsSubclassOf(typeof(Results)))
{
returns = (IQueryReader)returnType.GetMethod("GetReader", BindingFlags.Public | BindingFlags.Static).Invoke(null, Parameters.EmptyArray);
}
else
{
returns = (IQueryReader)typeof(ListReader <>).MakeGenericType(returnType).GetField("Default", BindingFlags.Static | BindingFlags.Public).GetValue(null);
}
}
// get the proper query method to call based on whether we are doing this async and whether there is a single or multiple result set
// the nice thing is that the generic expansion will automatically create the proper return type like IList<T> or Results<T>.
if (doAsync)
{
return(CallQueryAsync(cmd, returns, cancellationToken));
}
else
{
return(CallQuery(cmd, returns, outputParameters));
}
}
finally
{
if (cmd != null)
{
cmd.Dispose();
}
}
}
/// <summary>
/// Add a list of objects as a table-valued parameter.
/// </summary>
/// <param name="parameter">The parameter to modify.</param>
/// <param name="list">The list to add to the parameter.</param>
/// <param name="command">The command to add parameters to.</param>
/// <param name="listType">The type that the list contains.</param>
private static void AddListParameterByClass(IDataParameter parameter, IEnumerable list, IDbCommand command, Type listType)
{
InsightDbProvider.For(command).SetupTableValuedParameter(command, parameter, list, listType);
}
/// <summary>
/// Registers this provider. This is generally not needed, unless you want to force an assembly reference to this provider.
/// </summary>
public static void RegisterProvider()
{
InsightDbProvider.RegisterProvider(new GlimpseInsightDbProvider());
}
/// <summary>
/// Registers this provider. This is generally not needed, unless you want to force an assembly reference to this provider.
/// </summary>
public static void RegisterProvider()
{
InsightDbProvider.RegisterProvider(new SqlInsightDbProvider());
}
/// <summary> /// Registers this provider. This is generally not needed, unless you want to force an assembly reference to this provider. /// </summary> public static void RegisterProvider() => InsightDbProvider.RegisterProvider(new MySqlConnectorInsightDbProvider());
private ObjectReader(IDbCommand command, Type type, IDataReader reader)
{
var provider = InsightDbProvider.For(command);
// copy the schema and fix it
SchemaTable = reader.GetSchemaTable().Copy();
FixupSchemaNumericScale();
FixupSchemaRemoveReadOnlyColumns();
IsAtomicType = TypeHelper.IsAtomicType(type);
if (!IsAtomicType)
{
// create a mapping, and only keep mappings that match our modified schema
var mappings = ColumnMapping.Tables.CreateMapping(type, reader, null, null, null, 0, reader.FieldCount, true)
.Where(m => m != null).ToArray();
int columnCount = SchemaTable.Rows.Count;
_accessors = new Func <object, object> [columnCount];
_memberTypes = new Type[columnCount];
for (int i = 0; i < columnCount; i++)
{
var columnName = SchemaTable.Rows[i]["ColumnName"].ToString();
var mapping = mappings.FirstOrDefault(m => String.Compare(m.ColumnName, columnName, StringComparison.OrdinalIgnoreCase) == 0);
if (mapping == null)
{
continue;
}
ClassPropInfo propInfo = mapping.ClassPropInfo;
// create a new anonymous method that takes an object and returns the value
var dm = new DynamicMethod(string.Format(CultureInfo.InvariantCulture, "GetValue-{0}-{1}", type.FullName, Guid.NewGuid()), typeof(object), new[] { typeof(object) }, true);
var il = dm.GetILGenerator();
// convert the object reference to the desired type
il.Emit(OpCodes.Ldarg_0);
if (type.IsValueType)
{
// access the field/property of a value type
var valueHolder = il.DeclareLocal(type);
il.Emit(OpCodes.Unbox_Any, type);
il.Emit(OpCodes.Stloc, valueHolder);
il.Emit(OpCodes.Ldloca_S, valueHolder);
}
else
{
il.Emit(OpCodes.Isinst, type); // cast object -> type
}
// get the value from the object
propInfo.EmitGetValue(il);
// if the type is nullable, handle nulls
Type sourceType = propInfo.MemberType;
Type targetType = (Type)SchemaTable.Rows[i]["DataType"];
Type underlyingType = Nullable.GetUnderlyingType(sourceType);
if (underlyingType != null)
{
// check for not null
Label notNullLabel = il.DefineLabel();
var nullableHolder = il.DeclareLocal(propInfo.MemberType);
il.Emit(OpCodes.Stloc, nullableHolder);
il.Emit(OpCodes.Ldloca_S, nullableHolder);
il.Emit(OpCodes.Call, sourceType.GetProperty("HasValue").GetGetMethod());
il.Emit(OpCodes.Brtrue_S, notNullLabel);
// it's null, just return null
il.Emit(OpCodes.Ldnull);
il.Emit(OpCodes.Ret);
il.MarkLabel(notNullLabel);
// it's not null, so unbox to the underlyingtype
il.Emit(OpCodes.Ldloca, nullableHolder);
il.Emit(OpCodes.Call, sourceType.GetProperty("Value").GetGetMethod());
// at this point we have de-nulled value, so use those converters
sourceType = underlyingType;
}
if (sourceType != targetType && !sourceType.IsValueType && sourceType != typeof(string))
{
// if the provider type is Xml, then serialize the value
var serializerMethod = mapping.Serializer.GetMethod("Serialize", BindingFlags.Public | BindingFlags.Static, null, new Type[] { typeof(object), typeof(Type) }, null);
if (serializerMethod == null)
{
throw new InvalidOperationException(String.Format(CultureInfo.InvariantCulture, "Serializer type {0} needs the method 'public static string Serialize(object, Type)'", mapping.Serializer.Name));
}
il.EmitLoadType(sourceType);
il.Emit(OpCodes.Call, serializerMethod);
}
else
{
// attempt to convert the value
// either way, we are putting it in an object variable, so box it
if (TypeConverterGenerator.EmitConversionOrCoersion(il, sourceType, targetType))
{
il.Emit(OpCodes.Box, targetType);
}
else
{
il.Emit(OpCodes.Box, sourceType);
}
}
il.Emit(OpCodes.Ret);
_memberTypes[i] = propInfo.MemberType;
_accessors[i] = (Func <object, object>)dm.CreateDelegate(typeof(Func <object, object>));
}
}
else
{
// we are working off a single-column atomic type
_memberTypes = new Type[1] {
type
};
_accessors = new Func <object, object>[] { o => o };
}
}
/// <inheritdoc/>
public override void BulkCopy(IDbConnection connection, string tableName, IDataReader reader, Action <InsightBulkCopy> configure, InsightBulkCopyOptions options, IDbTransaction transaction)
{
connection = GetInnerConnection(connection);
transaction = ((GlimpseDbTransaction)transaction).InnerTransaction;
InsightDbProvider.For(connection).BulkCopy(connection, tableName, reader, configure, options, transaction);
}