/// <summary>
/// Generate an expression tree to clone a class
/// </summary>
/// <param name="variables">Global variables for the expression tree</param>
/// <param name="sourceType">Type of the source object</param>
/// <param name="source">Source object</param>
/// <param name="clone">Clone object</param>
/// <param name="refTrackerParam">Reference tracker</param>
/// <returns>An expression tree that can clone a class</returns>
internal static Expression GenerateClassExpressions(List <ParameterExpression> variables,
Type sourceType,
ParameterExpression source,
ParameterExpression clone,
ParameterExpression refTrackerParam)
{
var cloner = Expression.Parameter(typeof(Func <object, ObjectClonerReferenceTracker, object>), "cloner");
var clonedItem = Expression.Parameter(typeof(object), "clonedItem");
variables.Add(cloner);
variables.Add(clonedItem);
var ctor = Expression.Call(FormatterServicesMih.GetUninitializedObject(), Expression.Constant(sourceType));
var copyExpressions = new List <Expression>();
var fields = InternalSerializationStuff.GetFields(sourceType);
copyExpressions.Add(Expression.Assign(clone, Expression.Convert(ctor, sourceType)));
copyExpressions.Add(Expression.Call(refTrackerParam, ObjectClonerReferenceTrackerMih.Track(), source, clone));
GenerateCopyFieldsExpressions(fields,
source,
clone,
copyExpressions,
refTrackerParam,
clonedItem);
return(ObjectCloner.GenerateNullTrackedOrUntrackedExpression(source,
clone,
sourceType,
refTrackerParam,
Expression.Block(copyExpressions)));
}
private static Expression GenerateArrayOfKnownDimension(List <ParameterExpression> variables,
ParameterExpression source,
ParameterExpression clone,
Type sourceType,
Type elementType,
ParameterExpression refTrackerParam)
{
var i = Expression.Parameter(typeof(int), "i");
var lengths = Expression.Parameter(typeof(int[]), "lengths");
var rank = sourceType.GetArrayRank();
variables.Add(i);
variables.Add(lengths);
List <Expression> notTrackedExpressions = new List <Expression>();
notTrackedExpressions.Add(Expression.IfThen(Expression.GreaterThanOrEqual(Expression.Constant(rank), Expression.Constant(255)),
Expression.Throw(Expression.New(NotSupportedExceptionMih.ConstructorString(), Expression.Constant("Array with more than 255 dimensions are not supported")))));
notTrackedExpressions.Add(Expression.Assign(lengths, Expression.Call(CreateArrayMethodInfo.GetCreateArrayMethodInfo(typeof(int)), Expression.Constant(rank))));
notTrackedExpressions.AddRange(PopulateDimensionalArrayLength(source, i, lengths, rank));
notTrackedExpressions.Add(Expression.Assign(clone, Expression.Convert(Expression.Call(ArrayMih.CreateInstance(), Expression.Constant(elementType), lengths), sourceType)));
notTrackedExpressions.Add(Expression.Call(refTrackerParam, ObjectClonerReferenceTrackerMih.Track(), source, clone));
notTrackedExpressions.AddRange(GenerateCopyDimensionalArray(source, clone, sourceType, variables, lengths, rank, refTrackerParam));
return(ObjectCloner.GenerateNullTrackedOrUntrackedExpression(source,
clone,
sourceType,
refTrackerParam,
Expression.Block(notTrackedExpressions)));
}
/// <summary>
/// Generate an expression tree that clones ExpandoObject
/// </summary>
/// <param name="variables">Global variables for the expression tree</param>
/// <param name="source">Source object</param>
/// <param name="clone">Clone object</param>
/// <param name="refTrackerParam">Reference tracker</param>
/// <returns>An expression tree that clones ExpandoObject</returns>
public static Expression GenerateExpandoObjectExpression(List <ParameterExpression> variables,
ParameterExpression source,
ParameterExpression clone,
ParameterExpression refTrackerParam)
{
var enumerableType = typeof(IEnumerable <KeyValuePair <string, object> >);
var getEnumeratorMethodInfo = IEnumerableMih.GetEnumerator <string, object>();
var enumeratorMethod = Expression.Call(Expression.Convert(source, enumerableType), getEnumeratorMethodInfo);
var dictType = typeof(IDictionary <string, object>);
var cloneAsDict = Expression.Parameter(dictType, "cloneDict");
var expressions = new List <Expression>();
variables.Add(cloneAsDict);
expressions.Add(Expression.Assign(clone, Expression.New(typeof(ExpandoObject))));
expressions.Add(Expression.Assign(cloneAsDict, Expression.Convert(clone, dictType)));
expressions.Add(Expression.Call(refTrackerParam, ObjectClonerReferenceTrackerMih.Track(), source, clone));
var loopBodyCargo = new EnumerableLoopBodyCargo();
loopBodyCargo.EnumeratorType = typeof(IEnumerator <KeyValuePair <string, object> >);
loopBodyCargo.KvpType = typeof(KeyValuePair <string, object>);
expressions.Add(EnumerableLoopHelper.GenerateEnumeratorLoop(variables,
CloneKeyValuePair(clone, refTrackerParam),
enumeratorMethod,
null,
loopBodyCargo));
return(ObjectCloner.GenerateNullTrackedOrUntrackedExpression(source,
clone,
typeof(ExpandoObject),
refTrackerParam,
Expression.Block(expressions)));
}
private static Expression CloneDictionaryWithDefaultComparer(Type genericDictionaryType,
List <ParameterExpression> variables,
ParameterExpression source,
ParameterExpression clone,
Type sourceType,
ParameterExpression refTrackerParam)
{
var ctor = sourceType.GetConstructor(new Type[0]);
if (ctor == null)
{
throw new MissingConstructorException("Type " + sourceType + " must have a public constructor without parameter.");
}
var expressions = new List <Expression>();
expressions.Add(Expression.Assign(clone, Expression.New(ctor)));
expressions.Add(Expression.Call(refTrackerParam, ObjectClonerReferenceTrackerMih.Track(), source, clone));
CopyFieldsAndValues(genericDictionaryType,
source,
clone,
sourceType,
refTrackerParam,
expressions,
variables);
return(ObjectCloner.GenerateNullTrackedOrUntrackedExpression(source,
clone,
sourceType,
refTrackerParam,
Expression.Block(expressions)));
}
private static Expression GenerateJaggedArray(List <ParameterExpression> variables,
ParameterExpression source,
ParameterExpression clone,
Type sourceType,
ParameterExpression refTrackerParam)
{
var elementType = sourceType.GetElementType();
var item = Expression.Parameter(elementType, "item");
var clonedItem = Expression.Parameter(elementType, "item");
var typeExpr = Expression.Parameter(typeof(Type), "typeExpr");
var i = Expression.Parameter(typeof(int), "i");
var length = Expression.Parameter(typeof(int), "length");
variables.Add(typeExpr);
variables.Add(clonedItem);
variables.Add(item);
variables.Add(length);
variables.Add(i);
var notTrackedExpressions = new List <Expression>();
notTrackedExpressions.Add(Expression.Assign(length, Expression.Property(source, "Length")));
notTrackedExpressions.Add(Expression.Assign(i, Expression.Constant(0)));
notTrackedExpressions.Add(Expression.Assign(clone, Expression.Convert(Expression.New(sourceType.GetConstructor(new[] { typeof(int) }), length), sourceType)));
notTrackedExpressions.Add(Expression.Call(refTrackerParam, ObjectClonerReferenceTrackerMih.Track(), source, clone));
Debug.Assert(!elementType.IsPrimitive && !elementType.IsValueType && elementType != typeof(string), "Element type cannot be a primitive type");
var loopExpressions = new List <Expression>();
loopExpressions.Add(Expression.Assign(item, Expression.Convert(Expression.Call(source, ArrayMih.GetValue(), i), elementType)));
loopExpressions.Add(ClassCloner.GetCloneClassTypeExpression(refTrackerParam, item, clonedItem, elementType));
loopExpressions.Add(Expression.Call(clone, ArrayMih.SetValue(), Expression.Convert(clonedItem, typeof(object)), i));
loopExpressions.Add(Expression.Assign(i, Expression.Add(i, Expression.Constant(1))));
var cond = Expression.LessThan(i, length);
var loopBody = Expression.Block(loopExpressions);
var breakLabel = Expression.Label("breakLabel");
var loop = Expression.Loop(Expression.IfThenElse(cond,
loopBody,
Expression.Break(breakLabel)),
breakLabel);
notTrackedExpressions.Add(loop);
return(ObjectCloner.GenerateNullTrackedOrUntrackedExpression(source,
clone,
sourceType,
refTrackerParam,
Expression.Block(notTrackedExpressions)));
}
/// <summary>
/// Generate an expression tree for arrays
/// </summary>
/// <param name="variables">Global variables for the expression tree</param>
/// <param name="source">Source object</param>
/// <param name="clone">Clone object</param>
/// <param name="sourceType">Type of the source object</param>
/// <param name="refTrackerParam">Reference tracker</param>
/// <returns>Expression tree to clone arrays</returns>
public static Expression GenerateArrayExpression(List <ParameterExpression> variables,
ParameterExpression source,
ParameterExpression clone,
Type sourceType,
ParameterExpression refTrackerParam)
{
var elementType = sourceType.GetElementType();
if (elementType.IsPrimitive || elementType.IsValueType || (elementType == typeof(string)))
{
return(Expression.Block(Expression.Assign(clone, Expression.Convert(Expression.Call(Expression.Convert(source, typeof(Array)), ArrayMih.Clone()), sourceType)),
Expression.Call(refTrackerParam, ObjectClonerReferenceTrackerMih.Track(), source, clone)));
}
if (elementType.IsArray)
{
return(GenerateJaggedArray(variables, source, clone, sourceType, refTrackerParam));
}
else
{
return(GenerateArrayOfKnownDimension(variables, source, clone, sourceType, elementType, refTrackerParam));
}
}
private static Expression CloneDictionaryWithCustomComparer(Type genericDictionaryType,
ConstructorInfo comparerConstructor,
List <ParameterExpression> variables,
ParameterExpression source,
ParameterExpression clone,
Type sourceType,
ParameterExpression refTrackerParam)
{
if (comparerConstructor == null)
{
throw new MissingConstructorException("Type " + sourceType + " must have a public constructor that takes an IEqualityComparer<> parameter.");
}
var expressions = new List <Expression>();
var sourceComparer = Expression.Property(source, nameof(Dictionary <int, int> .Comparer));
var comparerType = typeof(IEqualityComparer <>).MakeGenericType(genericDictionaryType.GetGenericArguments()[0]);
var clonedComparer = ClassCloner.CallCopyExpression(sourceComparer,
refTrackerParam,
Expression.Constant(comparerType));
expressions.Add(Expression.Assign(clone, Expression.New(comparerConstructor, Expression.Convert(clonedComparer, comparerType))));
expressions.Add(Expression.Call(refTrackerParam, ObjectClonerReferenceTrackerMih.Track(), source, clone));
CopyFieldsAndValues(genericDictionaryType,
source,
clone,
sourceType,
refTrackerParam,
expressions,
variables);
return(ObjectCloner.GenerateNullTrackedOrUntrackedExpression(source,
clone,
sourceType,
refTrackerParam,
Expression.Block(expressions)));
}
/// <summary>
/// Generates an expression tree to clone an ISerializable
/// </summary>
/// <param name="variables">Global variables for the expression tree</param>
/// <param name="source">Source object</param>
/// <param name="clone">Clone object</param>
/// <param name="sourceType">Type of the source object</param>
/// <param name="refTrackerParam">Reference tracker</param>
/// <returns>An expression tree to clone an ISerializable</returns>
public static Expression GenerateISerializableExpression(List <ParameterExpression> variables,
ParameterExpression source,
ParameterExpression clone,
Type sourceType,
ParameterExpression refTrackerParam)
{
var serializationConstructor = ISerializableSerializer.GetSerializationConstructor(sourceType);
if (serializationConstructor == null)
{
throw new MissingConstructorException("Cannot serialize type " + sourceType + " because it does not have the required constructor for ISerializable. If you inherits from a class that implements ISerializable you have to expose the serialization constructor.");
}
var getEnumeratorMethodInfo = SerializationInfoMih.GetEnumerator();
var siSource = Expression.Parameter(typeof(SerializationInfo), "siSource");
var fc = Expression.Parameter(typeof(FormatterConverter), "fc");
var context = Expression.Parameter(typeof(StreamingContext), "context");
var iserSource = Expression.Parameter(typeof(ISerializable), "iserSource");
var siClone = Expression.Parameter(typeof(SerializationInfo), "siClone");
var cloner = Expression.Parameter(typeof(Func <object, ObjectClonerReferenceTracker, object>), "cloner");
var clonedItem = Expression.Parameter(typeof(object), "clonedItem");
variables.Add(fc);
variables.Add(context);
variables.Add(siSource);
variables.Add(iserSource);
variables.Add(siClone);
variables.Add(cloner);
variables.Add(clonedItem);
var enumeratorMethod = Expression.Call(siSource,
getEnumeratorMethodInfo);
var loopBodyCargo = new EnumerableLoopBodyCargo();
loopBodyCargo.EnumeratorType = typeof(SerializationInfoEnumerator);
loopBodyCargo.KvpType = typeof(SerializationEntry);
var expressions = new List <Expression>();
expressions.Add(Expression.Assign(fc, Expression.New(typeof(FormatterConverter))));
expressions.Add(Expression.Assign(context, Expression.New(StreamingContextMih.Constructor(), Expression.Constant(StreamingContextStates.All))));
expressions.Add(Expression.Assign(siSource, Expression.New(SerializationInfoMih.Constructor(), Expression.Constant(sourceType), fc)));
expressions.Add(Expression.Assign(iserSource, Expression.Convert(source, typeof(ISerializable))));
expressions.Add(Expression.Assign(siClone, Expression.New(SerializationInfoMih.Constructor(), Expression.Constant(sourceType), fc)));
expressions.AddRange(SerializationCallbacksHelper.GenerateOnSerializingAttributeExpression(sourceType, source, context));
expressions.Add(Expression.Call(iserSource, ISerializableMih.GetObjectData(), siSource, context));
expressions.AddRange(SerializationCallbacksHelper.GenerateOnSerializedAttributeExpression(sourceType, source, context));
expressions.Add(Expression.IfThen(Expression.IsTrue(Expression.Property(siSource, "IsFullTypeNameSetExplicit")),
Expression.Throw(Expression.New(InvalidOperationExceptionMih.Constructor(),
Expression.Constant("Changing the full type name for an ISerializable is not supported")))));
expressions.Add(Expression.IfThen(Expression.IsTrue(Expression.Property(siSource, "IsAssemblyNameSetExplicit")),
Expression.Throw(Expression.New(InvalidOperationExceptionMih.Constructor(),
Expression.Constant("Changing the assembly name for an ISerializable is not supported")))));
expressions.Add(EnumerableLoopHelper.GenerateEnumeratorLoop(variables,
GetLoopBodyCargo(siClone, clonedItem, refTrackerParam),
enumeratorMethod,
null,
loopBodyCargo));
expressions.Add(Expression.Assign(clone, Expression.New(serializationConstructor, siClone, context)));
expressions.Add(Expression.Call(refTrackerParam, ObjectClonerReferenceTrackerMih.Track(), source, clone));
expressions.AddRange(SerializationCallbacksHelper.GenerateOnDeserializedAttributeExpression(sourceType, clone, context));
expressions.Add(SerializationCallbacksHelper.GenerateCallIDeserializationExpression(sourceType, clone));
return(ObjectCloner.GenerateNullTrackedOrUntrackedExpression(source,
clone,
sourceType,
refTrackerParam,
Expression.Block(expressions)));
}
