private Expression BuildArrayCreator()
{
if (!_property.CanWrite)
{
return(null);
}
var genericType = _property.PropertyType.GetGenericArguments().Single();
var creatorInstance = ConcreteTypeCreator.Get(genericType);
var collection = Expression.Variable(_property.PropertyType);
var createCollection = MakeCreateNewCollection(collection, genericType);
if (createCollection == null)
{
return(null);
}
var addMethod = _property.PropertyType.GetMethod("Add");
if (addMethod == null)
{
return(null);
}
return(BuildCollectionCreatorExpression(genericType, creatorInstance, collection, createCollection, addMethod));
}
public bool TryCreate(IDictionary <string, object> data, out object result)
{
bool anyPropertiesSet = false;
object obj = Activator.CreateInstance(_concreteType);
object value;
foreach (var propertyInfo in _concreteType.GetProperties().Where(pi => CanSetProperty(pi, data)))
{
value = data[propertyInfo.Name];
if (ConcreteCollectionTypeCreator.IsCollectionType(propertyInfo.PropertyType))
{
if (!ConcreteCollectionTypeCreator.TryCreate(propertyInfo.PropertyType, (IEnumerable)value, out value))
{
continue;
}
}
else
{
var subData = value as IDictionary <string, object>;
if (subData != null && !ConcreteTypeCreator.Get(propertyInfo.PropertyType).TryCreate(subData, out value))
{
continue;
}
}
propertyInfo.SetValue(obj, value, null);
anyPropertiesSet = true;
}
result = anyPropertiesSet ? obj : null;
return(anyPropertiesSet);
}
private Expression BuildCollectionCreatorExpression(Type genericType, ConcreteTypeCreator creatorInstance, ParameterExpression collection, BinaryExpression createCollection, MethodInfo addMethod)
{
BlockExpression dictionaryBlock;
var isDictionaryCollection = BuildComplexTypeCollectionPopulator(collection, genericType, addMethod, createCollection, creatorInstance, out dictionaryBlock);
BlockExpression objectBlock;
var isObjectcollection = BuildSimpleTypeCollectionPopulator(collection, genericType, addMethod, createCollection, creatorInstance, out objectBlock);
return(Expression.IfThenElse(isDictionaryCollection, dictionaryBlock,
Expression.IfThen(isObjectcollection, objectBlock)));
}
protected bool TryConvertElement(Type type, object value, out object result)
{
result = null;
if (value == null)
{
return(true);
}
var valueType = value.GetType();
if (type.IsAssignableFrom(valueType))
{
result = value;
return(true);
}
try
{
var code = Convert.GetTypeCode(value);
if (type.IsEnum)
{
return(ConvertEnum(type, value, out result));
}
if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable <>))
{
result = System.Convert.ChangeType(value, Nullable.GetUnderlyingType(type));
return(true);
}
if (code != TypeCode.Object)
{
result = System.Convert.ChangeType(value, type);
return(true);
}
var data = value as IDictionary <string, object>;
if (data != null)
{
return(ConcreteTypeCreator.Get(type).TryCreate(data, out result));
}
}
catch (FormatException)
{
return(false);
}
catch (ArgumentException)
{
return(false);
}
return(true);
}
private object ConvertAndCacheReference(Type type, IDictionary <string, object> data)
{
_concreteObject = null;
object result;
if (ConcreteTypeCreator.Get(type).TryCreate(data, out result))
{
Interlocked.CompareExchange(ref _concreteObject, new WeakReference(result), null);
return(_concreteObject.Target);
}
Interlocked.CompareExchange(ref _concreteObject, new WeakReference(CastFailureObject), null);
return(null);
}
private BinaryExpression CreateComplexAssign()
{
var creator = Expression.Constant(ConcreteTypeCreator.Get(_property.PropertyType));
var methodCallExpression = Expression.Call(creator, CreatorCreateMethod,
// ReSharper disable PossiblyMistakenUseOfParamsMethod
Expression.Convert(_itemProperty,
typeof(IDictionary <string, object>)));
// ReSharper restore PossiblyMistakenUseOfParamsMethod
var complexAssign = Expression.Assign(_nameProperty,
Expression.Convert(
methodCallExpression, _property.PropertyType));
return(complexAssign);
}
private TypeBinaryExpression BuildSimpleTypeCollectionPopulator(ParameterExpression collection, Type genericType,
MethodInfo addMethod, BinaryExpression createCollection,
ConcreteTypeCreator creatorInstance, out BlockExpression block)
{
var creator = Expression.Constant(creatorInstance);
var array = Expression.Variable(typeof(object[]));
var i = Expression.Variable(typeof(int));
var current = Expression.Variable(typeof(object));
var isObjectCollection = Expression.TypeIs(_itemProperty,
typeof(IEnumerable <object>));
var toArray = Expression.Assign(array,
Expression.Call(ToArrayObjectMethod,
Expression.Convert(_itemProperty,
typeof(IEnumerable <object>))));
var start = Expression.Assign(i, Expression.Constant(0));
var label = Expression.Label();
var loop = Expression.Loop(
Expression.IfThenElse(
Expression.LessThan(i, Expression.Property(array, ArrayObjectLengthProperty)),
Expression.Block(
Expression.Assign(current, Expression.ArrayIndex(array, i)),
Expression.IfThenElse(
Expression.TypeIs(current, typeof(IDictionary <string, object>)),
Expression.Call(collection, addMethod,
Expression.Convert(Expression.Call(creator, CreatorCreateMethod,
Expression.Convert(current, typeof(IDictionary <string, object>))),
genericType)),
Expression.Call(collection, addMethod,
Expression.Convert(current, genericType))),
Expression.PreIncrementAssign(i)
),
Expression.Break(label)
),
label
);
block = Expression.Block(
new[] { array, i, collection, current },
createCollection,
toArray,
start,
loop,
_property.CanWrite ? (Expression)Expression.Assign(_nameProperty, collection) : Expression.Empty());
return(isObjectCollection);
}
private Expression BuildCollectionCreator()
{
var genericType = _property.PropertyType.GetGenericArguments().Single();
var creatorInstance = ConcreteTypeCreator.Get(genericType);
var collection = Expression.Variable(_property.PropertyType);
BinaryExpression createCollection = null;
if (_property.CanWrite)
{
createCollection = MakeCreateNewCollection(collection, genericType);
}
else
{
createCollection = Expression.Assign(collection, _nameProperty);
}
var addMethod = _property.PropertyType.GetInterfaceMethod("Add");
if (createCollection != null && addMethod != null)
{
return(BuildCollectionCreatorExpression(genericType, creatorInstance, collection, createCollection, addMethod));
}
return(null);
}
private static ConcreteTypeCreator BuildCreator(Type targetType)
{
var creator = new ConcreteTypeCreator(new Lazy <Func <IDictionary <string, object>, object> >(() => BuildLambda(targetType), LazyThreadSafetyMode.PublicationOnly));
return(creator);
}
private static ConcreteTypeCreator BuildCreator(Type targetType)
{
var creator = new ConcreteTypeCreator(new Lazy<Func<IDictionary<string, object>, object>>(() => BuildLambda(targetType), LazyThreadSafetyMode.PublicationOnly));
return creator;
}