public void EndSetMembers(CodeGenerator generator, ArgBuilder targetObject)
{
generator.Ldarg(targetObject);
generator.Load(null);
generator.If(Cmp.EqualTo);
generator.Pop();
LocalBuilder dataRow = generator.DeclareLocal(typeof(DataRow));
generator.Ldloc(locDataTable);
generator.Call(typeof(DataTable).GetMethod("NewRow"));
generator.Stloc(dataRow);
LocalBuilder locCurrent = generator.DeclareLocal(typeof(string));
LocalBuilder locEnumerator = generator.DeclareLocal(typeof(Dictionary<string, object>.KeyCollection.Enumerator));
generator.Ldloc(locMemberValues);
generator.Call(typeof(Dictionary<string, object>).GetMethod("get_Keys"));
generator.Call(typeof(Dictionary<string, object>.KeyCollection).GetMethod("GetEnumerator"));
generator.Stloc(locEnumerator);
MethodInfo getCurrentMethod = typeof(Dictionary<string, object>.KeyCollection.Enumerator).GetMethod("get_Current");
MethodInfo moveNextMethod = typeof(Dictionary<string, object>.KeyCollection.Enumerator).GetMethod("MoveNext");
generator.ForEach(locCurrent, typeof(string), typeof(Dictionary<string, object>.KeyCollection.Enumerator), locEnumerator, getCurrentMethod);
generator.Ldloc(dataRow);
generator.Ldloc(locCurrent);
generator.Ldloc(locMemberValues);
generator.Ldloc(locCurrent);
generator.Call(typeof(Dictionary<string, object>).GetMethod("get_Item"));
generator.Call(typeof(DataRow).GetMethod("set_Item", new Type[] { typeof(string), typeof(object) }));
generator.EndForEach(moveNextMethod);
generator.Ldloc(dataRow);
generator.EndIf();
}
public void BeginSetMembers(CodeGenerator generator, ArgBuilder targetObject)
{
locMemberValues = generator.DeclareLocal(typeof(Dictionary<string, object>), "memberValues");
locDataTable = generator.DeclareLocal(typeof(DataTable), "dataTable");
generator.New(typeof(Dictionary<string, object>).GetConstructor(Type.EmptyTypes));
generator.Stloc(locMemberValues);
generator.New(typeof(DataTable).GetConstructor(Type.EmptyTypes));
generator.Stloc(locDataTable);
}
public void GetMemberValue(CodeGenerator generator, ArgBuilder targetObject, string memberName, ref LocalBuilder memberValue)
{
LocalBuilder locValue = generator.DeclareLocal(typeof(string));
Type targetType = memberValue.LocalType;
Type originalType = ConvertorGeneratorHelper.GetOriginalType(targetType);
generator.Ldarg(targetObject);
generator.Load(memberName);
generator.Call(typeof(NameValueCollection).GetMethod("get_Item", new Type[] { typeof(string) }));
generator.Stloc(locValue);
if (targetType.IsAssignableFrom(typeof(string)))
{
generator.Ldloc(locValue);
generator.Stloc(memberValue);
return;
}
else
{
generator.Ldloc(locValue);
generator.Call(typeof(string).GetMethod("IsNullOrEmpty"));
generator.Load(true);
generator.If(Cmp.NotEqualTo);
if (targetType == typeof(Guid))
{
generator.Ldloc(locValue);
generator.New(typeof(Guid).GetConstructor(new Type[] { typeof(string) }));
generator.Stloc(memberValue);
}
else
{
MethodInfo parseMethod = targetType.GetMethod("Parse", new Type[] { typeof(string) });
if (parseMethod != null)
{
generator.Ldloc(locValue);
generator.Call(parseMethod);
generator.Stloc(memberValue);
}
else
{
generator.Ldloc(locValue);
generator.Load(originalType);
generator.Call(typeof(Convert).GetMethod("ChangeType", new Type[] { typeof(object), typeof(Type) }));
if (targetType.IsValueType)
{
generator.UnboxAny(targetType);
}
generator.Stloc(memberValue);
}
}
generator.Else();
generator.LoadDefaultValue(targetType);
generator.Stloc(memberValue);
generator.EndIf();
}
}
public override ConvertHandler GetConvertHandler(Type inputType, Type outputType, object inputObject, object outputObject, Dictionary<string, string> mappingNames, List<string> ignoreList, Dictionary<int, string> mappingOrders, bool mappingSpecifiedOnly)
{
Dictionary<string, string> distToSrc = new Dictionary<string, string>();
Dictionary<string, MemberInfo> members = new Dictionary<string, MemberInfo>();
foreach (string sourceName in mappingNames.Keys)
{
MemberInfo sourceMember = ConvertorGeneratorHelper.GetMemberInfo(inputType, sourceName);
Check.Require(sourceMember != null, string.Format("member named {0} could not be found in {1}", sourceName, outputType.FullName));
distToSrc.Add(mappingNames[sourceName], sourceName);
members.Add(mappingNames[sourceName], sourceMember);
}
if (!mappingSpecifiedOnly)
{
Dictionary<string, MemberInfo> sourceMembers = ConvertorGeneratorHelper.GetMembers(inputType);
foreach (string sourceName in sourceMembers.Keys)
{
if (!ignoreList.Contains(sourceName) && !distToSrc.ContainsKey(sourceName))
{
distToSrc.Add(sourceName, sourceName);
members.Add(sourceName, sourceMembers[sourceName]);
}
}
}
CodeGenerator gen = new CodeGenerator();
gen.BeginMethod("m" + Guid.NewGuid().ToString("N"), typeof(ConvertHandler));
ArgBuilder inputObjectArg = new ArgBuilder(0, inputType);
ArgBuilder outputObjectArg = new ArgBuilder(1, outputType);
int currentCount = 0;
int memberCount = members.Count;
string[] keys = new string[memberCount];
distToSrc.Keys.CopyTo(keys, 0);
List<string> keyList = new List<string>(keys);
MemberSetterGenerator.BeginSetMembers(gen, outputObjectArg);
while (currentCount < memberCount)
{
currentCount++;
string targetName = ConvertorGeneratorHelper.GetCurrentKey(mappingOrders, currentCount, keyList).Replace("_", "");
if (string.IsNullOrEmpty(targetName))
{
continue;
}
string sourceName = distToSrc[targetName].Replace("_","");
if (MemberGetterGenerator.ContainsMember(sourceName, inputType, inputObject) && MemberSetterGenerator.ContainsMember(targetName, outputType, outputObject))
{
Type targetType = ConvertorGeneratorHelper.GetMemberType(members[targetName]);
LocalBuilder memberValue = gen.DeclareLocal(targetType, "memberValue");
MemberGetterGenerator.GetMemberValue(gen, inputObjectArg, sourceName, ref memberValue);
MemberSetterGenerator.SetMemberValue(gen, outputObjectArg, targetName, memberValue);
}
}
gen.Ldarg(outputObjectArg);
MemberSetterGenerator.EndSetMembers(gen, outputObjectArg);
return (ConvertHandler)gen.EndMethod();
}
public void GetMemberValue(CodeGenerator generator, ArgBuilder targetObject, string memberName, ref LocalBuilder memberValue)
{
LocalBuilder tempLocal = generator.DeclareLocal(typeof(object), "dataColumn");
Type targetType = memberValue.LocalType;
Type originalType = ConvertorGeneratorHelper.GetOriginalType(targetType);
generator.Ldarg(targetObject);
generator.Load(memberName);
generator.Call(typeof(DataRow).GetMethod("get_Item", new Type[] { typeof(string) }));
generator.Stloc(tempLocal);
generator.Ldloc(tempLocal);
generator.LoadMember(typeof(DBNull).GetField("Value", BindingFlags.Static | BindingFlags.Public));
generator.If(Cmp.EqualTo);
generator.LoadDefaultValue(targetType);
generator.Stloc(memberValue);
generator.Else();
generator.Ldloc(tempLocal);
generator.InternalILGenerator.Emit(OpCodes.Isinst, targetType);
generator.InternalILGenerator.Emit(OpCodes.Ldnull);
generator.InternalILGenerator.Emit(OpCodes.Cgt_Un);
generator.Load(true);
generator.If(Cmp.EqualTo);
generator.Ldloc(tempLocal);
if (targetType.IsValueType)
{
generator.UnboxAny(targetType);
}
generator.Stloc(memberValue);
generator.Else();
if (targetType == typeof(Guid))
{
generator.Ldloc(tempLocal);
generator.InternalILGenerator.Emit(OpCodes.Isinst, typeof(string));
generator.InternalILGenerator.Emit(OpCodes.Ldnull);
generator.InternalILGenerator.Emit(OpCodes.Cgt_Un);
generator.Load(true);
generator.If(Cmp.EqualTo);
generator.Ldloc(tempLocal);
generator.New(typeof(Guid).GetConstructor(new Type[] { typeof(string) }));
generator.Stloc(memberValue);
}
else
{
generator.Ldloc(tempLocal);
generator.InternalILGenerator.Emit(OpCodes.Isinst, typeof(IConvertible));
generator.InternalILGenerator.Emit(OpCodes.Ldnull);
generator.InternalILGenerator.Emit(OpCodes.Cgt_Un);
generator.Load(true);
generator.If(Cmp.EqualTo);
generator.Ldloc(tempLocal);
generator.Load(originalType);
generator.Call(typeof(Convert).GetMethod("ChangeType", new Type[] { typeof(object), typeof(Type) }));
if (targetType.IsValueType)
{
generator.UnboxAny(targetType);
}
generator.Stloc(memberValue);
}
generator.Else();
generator.LoadDefaultValue(targetType);
generator.Stloc(memberValue);
generator.EndIf();
generator.EndIf();
generator.EndIf();
}
public void GetMemberValue(CodeGenerator generator, ArgBuilder targetObject, string memberName, ref LocalBuilder memberValue)
{
MethodInfo getMethod;
bool mustBeUnBox = false;
switch (Type.GetTypeCode(memberValue.LocalType))
{
case TypeCode.Boolean:
getMethod = typeof(IDataRecord).GetMethod("GetBoolean");
break;
case TypeCode.Byte:
getMethod = typeof(IDataRecord).GetMethod("GetByte");
break;
case TypeCode.Char:
getMethod = typeof(IDataRecord).GetMethod("GetChar");
break;
case TypeCode.DateTime:
getMethod = typeof(IDataRecord).GetMethod("GetDateTime");
break;
case TypeCode.Decimal:
getMethod = typeof(IDataRecord).GetMethod("GetDecimal");
break;
//Teddy 2008-2-2: commented the lines below, because for some database, return data type of float or real could always be System.Single or System.Double
//case TypeCode.Double:
// getMethod = typeof(IDataRecord).GetMethod("GetDouble");
// break;
//case TypeCode.Single:
// getMethod = typeof(IDataRecord).GetMethod("GetFloat");
// break;
case TypeCode.Int16:
getMethod = typeof(IDataRecord).GetMethod("GetInt16");
break;
case TypeCode.Int32:
getMethod = typeof(IDataRecord).GetMethod("GetInt32");
break;
case TypeCode.Int64:
getMethod = typeof(IDataRecord).GetMethod("GetInt64");
break;
case TypeCode.String:
getMethod = typeof(IDataRecord).GetMethod("GetString");
break;
default:
getMethod = typeof(IDataRecord).GetMethod("GetValue");
mustBeUnBox = true;
break;
}
if (memberValue.LocalType == typeof(Guid))
{
getMethod = typeof(IDataRecord).GetMethod("GetGuid");
mustBeUnBox = false;
}
if (memberValue.LocalType.IsEnum)
{
getMethod = typeof(IDataRecord).GetMethod("GetValue");
mustBeUnBox = true;
}
generator.Ldarg(targetObject);
generator.Load(memberName);
generator.Call(typeof(IDataRecord).GetMethod("GetOrdinal"));
LocalBuilder fieldOrdinalLoc = generator.DeclareLocal(typeof(int));
generator.Stloc(fieldOrdinalLoc);
generator.Ldarg(targetObject);
generator.Ldloc(fieldOrdinalLoc);
generator.Call(typeof(IDataRecord).GetMethod("IsDBNull"));
generator.IfNot();
generator.Ldarg(targetObject);
generator.Ldloc(fieldOrdinalLoc);
generator.Call(getMethod);
//Teddy 2008-2-2: added the code section below to convert the object to the memberValue.LocalType
if (!memberValue.LocalType.IsEnum && getMethod == typeof(IDataRecord).GetMethod("GetValue"))
{
generator.Load(Type.GetTypeCode(memberValue.LocalType));
generator.Call(typeof(Convert).GetMethod("ChangeType", BindingFlags.Instance | BindingFlags.Public | BindingFlags.Static, null, new Type[] { typeof(object), typeof(TypeCode) }, null));
}
if (memberValue.LocalType.IsValueType && mustBeUnBox)
{
generator.UnboxAny(memberValue.LocalType);
}
generator.Else();
generator.LoadDefaultValue(memberValue.LocalType);
generator.EndIf();
generator.Stloc(memberValue);
}