/// <summary>
/// Returns syntax for initializing a new instance of the provided type.
/// </summary>
/// <param name="type">The type.</param>
/// <returns>Syntax for initializing a new instance of the provided type.</returns>
private static ExpressionSyntax GetObjectCreationExpressionSyntax(Type type)
{
ExpressionSyntax result;
var typeInfo = type.GetTypeInfo();
if (typeInfo.IsValueType)
{
// Use the default value.
result = SF.DefaultExpression(typeInfo.GetTypeSyntax());
}
else if (type.GetConstructor(Type.EmptyTypes) != null)
{
// Use the default constructor.
result = SF.ObjectCreationExpression(typeInfo.GetTypeSyntax()).AddArgumentListArguments();
}
else
{
// Create an unformatted object.
#if DNXCORE50
var bindingFlags = SyntaxFactoryExtensions.GetBindingFlagsParenthesizedExpressionSyntax(
SyntaxKind.BitwiseOrExpression,
BindingFlags.Instance,
BindingFlags.NonPublic,
BindingFlags.Public);
var nullLiteralExpressionArgument = SF.Argument(SF.LiteralExpression(SyntaxKind.NullLiteralExpression));
var typeArg = SF.Argument(SF.TypeOfExpression(typeInfo.GetTypeSyntax()));
var bindingFlagsArg = SF.Argument(bindingFlags);
var binderArg = nullLiteralExpressionArgument;
ArgumentSyntax ctorArgumentsArg;
var cons = typeInfo.GetConstructors(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance)
.OrderBy(p => p.GetParameters().Count()).FirstOrDefault();
var consParameters = cons != null?cons.GetParameters().Select(p => p.ParameterType).ToArray() : null;
if (consParameters != null && consParameters.Length > 0)
{
var separatedSyntaxList = new SeparatedSyntaxList <ExpressionSyntax>();
separatedSyntaxList = consParameters
.Aggregate(separatedSyntaxList, (current, t) => current.Add(SF.DefaultExpression(t.GetTypeInfo().GetTypeSyntax())));
ctorArgumentsArg = SF.Argument(separatedSyntaxList.GetArrayCreationWithInitializerSyntax(
SF.PredefinedType(SF.Token(SyntaxKind.ObjectKeyword))));
}
else
{
ctorArgumentsArg = nullLiteralExpressionArgument;
}
var cultureInfoArg = SF.Argument(
SF.IdentifierName("System").Member("Globalization").Member("CultureInfo").Member("InvariantCulture"));
var createInstanceArguments = new []
{
typeArg,
bindingFlagsArg,
binderArg,
ctorArgumentsArg,
cultureInfoArg
};
Expression <Func <object> > getUninitializedObject = () => Activator.CreateInstance(
default(Type),
BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public,
null,
null,
System.Globalization.CultureInfo.InvariantCulture);
result = SF.CastExpression(
type.GetTypeSyntax(),
getUninitializedObject.Invoke()
.AddArgumentListArguments(createInstanceArguments));
#else
Expression <Func <object> > getUninitializedObject =
() => FormatterServices.GetUninitializedObject(default(Type));
result = SF.CastExpression(
type.GetTypeSyntax(),
getUninitializedObject.Invoke()
.AddArgumentListArguments(
SF.Argument(SF.TypeOfExpression(typeInfo.GetTypeSyntax()))));
#endif
}
return(result);
}
/// <summary>
/// Returns syntax for the static fields of the serializer class.
/// </summary>
/// <param name="fields">The fields.</param>
/// <returns>Syntax for the static fields of the serializer class.</returns>
private static MemberDeclarationSyntax[] GenerateStaticFields(List <FieldInfoMember> fields)
{
var result = new List <MemberDeclarationSyntax>();
// ReSharper disable once ReturnValueOfPureMethodIsNotUsed
Expression <Action <TypeInfo> > getField = _ => _.GetField(string.Empty, BindingFlags.Default);
Expression <Action <Type> > getTypeInfo = _ => _.GetTypeInfo();
Expression <Action> getGetter = () => SerializationManager.GetGetter(default(FieldInfo));
Expression <Action> getReferenceSetter = () => SerializationManager.GetReferenceSetter(default(FieldInfo));
Expression <Action> getValueSetter = () => SerializationManager.GetValueSetter(default(FieldInfo));
// Expressions for specifying binding flags.
var bindingFlags = SyntaxFactoryExtensions.GetBindingFlagsParenthesizedExpressionSyntax(
SyntaxKind.BitwiseOrExpression,
BindingFlags.Instance,
BindingFlags.NonPublic,
BindingFlags.Public);
// Add each field and initialize it.
foreach (var field in fields)
{
var fieldInfo =
getField.Invoke(getTypeInfo.Invoke(SF.TypeOfExpression(field.FieldInfo.DeclaringType.GetTypeSyntax())))
.AddArgumentListArguments(
SF.Argument(field.FieldInfo.Name.GetLiteralExpression()),
SF.Argument(bindingFlags));
var fieldInfoVariable =
SF.VariableDeclarator(field.InfoFieldName).WithInitializer(SF.EqualsValueClause(fieldInfo));
var fieldInfoField = SF.IdentifierName(field.InfoFieldName);
if (!field.IsGettableProperty || !field.IsSettableProperty)
{
result.Add(
SF.FieldDeclaration(
SF.VariableDeclaration(typeof(FieldInfo).GetTypeSyntax()).AddVariables(fieldInfoVariable))
.AddModifiers(
SF.Token(SyntaxKind.PrivateKeyword),
SF.Token(SyntaxKind.StaticKeyword),
SF.Token(SyntaxKind.ReadOnlyKeyword)));
}
// Declare the getter for this field.
if (!field.IsGettableProperty)
{
var getterType =
typeof(Func <,>).MakeGenericType(field.FieldInfo.DeclaringType, field.FieldInfo.FieldType)
.GetTypeSyntax();
var fieldGetterVariable =
SF.VariableDeclarator(field.GetterFieldName)
.WithInitializer(
SF.EqualsValueClause(
SF.CastExpression(
getterType,
getGetter.Invoke().AddArgumentListArguments(SF.Argument(fieldInfoField)))));
result.Add(
SF.FieldDeclaration(SF.VariableDeclaration(getterType).AddVariables(fieldGetterVariable))
.AddModifiers(
SF.Token(SyntaxKind.PrivateKeyword),
SF.Token(SyntaxKind.StaticKeyword),
SF.Token(SyntaxKind.ReadOnlyKeyword)));
}
if (!field.IsSettableProperty)
{
if (field.FieldInfo.DeclaringType != null && field.FieldInfo.DeclaringType.IsValueType)
{
var setterType =
typeof(SerializationManager.ValueTypeSetter <,>).MakeGenericType(
field.FieldInfo.DeclaringType,
field.FieldInfo.FieldType).GetTypeSyntax();
var fieldSetterVariable =
SF.VariableDeclarator(field.SetterFieldName)
.WithInitializer(
SF.EqualsValueClause(
SF.CastExpression(
setterType,
getValueSetter.Invoke()
.AddArgumentListArguments(SF.Argument(fieldInfoField)))));
result.Add(
SF.FieldDeclaration(SF.VariableDeclaration(setterType).AddVariables(fieldSetterVariable))
.AddModifiers(
SF.Token(SyntaxKind.PrivateKeyword),
SF.Token(SyntaxKind.StaticKeyword),
SF.Token(SyntaxKind.ReadOnlyKeyword)));
}
else
{
var setterType =
typeof(Action <,>).MakeGenericType(field.FieldInfo.DeclaringType, field.FieldInfo.FieldType)
.GetTypeSyntax();
var fieldSetterVariable =
SF.VariableDeclarator(field.SetterFieldName)
.WithInitializer(
SF.EqualsValueClause(
SF.CastExpression(
setterType,
getReferenceSetter.Invoke()
.AddArgumentListArguments(SF.Argument(fieldInfoField)))));
result.Add(
SF.FieldDeclaration(SF.VariableDeclaration(setterType).AddVariables(fieldSetterVariable))
.AddModifiers(
SF.Token(SyntaxKind.PrivateKeyword),
SF.Token(SyntaxKind.StaticKeyword),
SF.Token(SyntaxKind.ReadOnlyKeyword)));
}
}
}
return(result.ToArray());
}
private static MemberDeclarationSyntax GenerateConstructor(string className, List <FieldInfoMember> fields)
{
var body = new List <StatementSyntax>();
Expression <Action <TypeInfo> > getField = _ => _.GetField(string.Empty, BindingFlags.Default);
Expression <Action <Type> > getTypeInfo = _ => _.GetTypeInfo();
Expression <Action <IFieldUtils> > getGetter = _ => _.GetGetter(default(FieldInfo));
Expression <Action <IFieldUtils> > getReferenceSetter = _ => _.GetReferenceSetter(default(FieldInfo));
Expression <Action <IFieldUtils> > getValueSetter = _ => _.GetValueSetter(default(FieldInfo));
// Expressions for specifying binding flags.
var bindingFlags = SyntaxFactoryExtensions.GetBindingFlagsParenthesizedExpressionSyntax(
SyntaxKind.BitwiseOrExpression,
BindingFlags.Instance,
BindingFlags.NonPublic,
BindingFlags.Public);
var fieldUtils = SF.IdentifierName("fieldUtils");
foreach (var field in fields)
{
// Get the field
var fieldInfoField = SF.IdentifierName(field.InfoFieldName);
var fieldInfo =
getField.Invoke(getTypeInfo.Invoke(SF.TypeOfExpression(field.FieldInfo.DeclaringType.GetTypeSyntax())))
.AddArgumentListArguments(
SF.Argument(field.FieldInfo.Name.GetLiteralExpression()),
SF.Argument(bindingFlags));
var fieldInfoVariable =
SF.VariableDeclarator(field.InfoFieldName).WithInitializer(SF.EqualsValueClause(fieldInfo));
if (!field.IsGettableProperty || !field.IsSettableProperty)
{
body.Add(SF.LocalDeclarationStatement(
SF.VariableDeclaration(typeof(FieldInfo).GetTypeSyntax()).AddVariables(fieldInfoVariable)));
}
// Set the getter/setter of the field
if (!field.IsGettableProperty)
{
var getterType =
typeof(Func <,>).MakeGenericType(field.FieldInfo.DeclaringType, field.FieldInfo.FieldType)
.GetTypeSyntax();
var getterInvoke = SF.CastExpression(
getterType,
getGetter.Invoke(fieldUtils).AddArgumentListArguments(SF.Argument(fieldInfoField)));
body.Add(SF.ExpressionStatement(
SF.AssignmentExpression(SyntaxKind.SimpleAssignmentExpression, SF.IdentifierName(field.GetterFieldName), getterInvoke)));
}
if (!field.IsSettableProperty)
{
if (field.FieldInfo.DeclaringType != null && field.FieldInfo.DeclaringType.GetTypeInfo().IsValueType)
{
var setterType =
typeof(ValueTypeSetter <,>).MakeGenericType(
field.FieldInfo.DeclaringType,
field.FieldInfo.FieldType).GetTypeSyntax();
var getValueSetterInvoke = SF.CastExpression(
setterType,
getValueSetter.Invoke(fieldUtils)
.AddArgumentListArguments(SF.Argument(fieldInfoField)));
body.Add(SF.ExpressionStatement(
SF.AssignmentExpression(SyntaxKind.SimpleAssignmentExpression, SF.IdentifierName(field.SetterFieldName), getValueSetterInvoke)));
}
else
{
var setterType =
typeof(Action <,>).MakeGenericType(field.FieldInfo.DeclaringType, field.FieldInfo.FieldType)
.GetTypeSyntax();
var getReferenceSetterInvoke = SF.CastExpression(
setterType,
getReferenceSetter.Invoke(fieldUtils)
.AddArgumentListArguments(SF.Argument(fieldInfoField)));
body.Add(SF.ExpressionStatement(
SF.AssignmentExpression(SyntaxKind.SimpleAssignmentExpression, SF.IdentifierName(field.SetterFieldName), getReferenceSetterInvoke)));
}
}
}
return
(SF.ConstructorDeclaration(className)
.AddModifiers(SF.Token(SyntaxKind.PublicKeyword))
.AddParameterListParameters(
SF.Parameter(fieldUtils.Identifier).WithType(typeof(IFieldUtils).GetTypeSyntax()))
.AddBodyStatements(body.ToArray()));
}