internal static Expression GetDeserializeExpressionProcessValueDeserializer(Type valueType, Expression value, Func <Expression, Expression> processOutputValue)
{
Expression outputValue;
var nsNull = FickleExpression.StaticCall("NSNull", FickleType.Define("id"), "null", null);
if (TypeSystem.IsPrimitiveType(valueType))
{
ConditionalExpression ifExpression;
var underlyingType = valueType.GetUnwrappedNullableType();
if (underlyingType.IsNumericType() || underlyingType == typeof(bool))
{
var typeToCompare = new FickleType("NSNumber");
if (underlyingType.IsEnum && valueType.GetUnderlyingType() == null)
{
outputValue = Expression.Convert(FickleExpression.Call(value, typeof(int), "intValue", null), valueType);
}
else
{
outputValue = Expression.Convert(value, valueType);
}
ifExpression = Expression.IfThen(Expression.TypeIs(value, typeToCompare), processOutputValue(outputValue).ToBlock());
}
else if (underlyingType.IsEnum)
{
Expression firstIf;
if (valueType.IsNullable())
{
outputValue = Expression.Convert(value, valueType);
firstIf = Expression.IfThen(Expression.TypeIs(value, FickleType.Define("NSNumber")), processOutputValue(outputValue).ToBlock());
}
else
{
outputValue = Expression.Convert(FickleExpression.Call(value, typeof(int), "intValue", null), valueType);
firstIf = Expression.IfThen(Expression.TypeIs(value, FickleType.Define("NSNumber")), processOutputValue(outputValue).ToBlock());
}
var parsedValue = FickleExpression.Variable(underlyingType, "parsedValue");
var success = Expression.Variable(typeof(bool), "success");
var parameters = new[] { new FickleParameterInfo(typeof(string), "value"), new FickleParameterInfo(underlyingType, "outValue", true) };
var methodInfo = new FickleMethodInfo(null, typeof(bool), TypeSystem.GetPrimitiveName(underlyingType, true) + "TryParse", parameters, true);
if (valueType.IsNullable())
{
outputValue = Expression.Convert(Expression.Condition(success, Expression.Convert(Expression.Convert(parsedValue, valueType), FickleType.Define("id")), Expression.Convert(FickleExpression.StaticCall(FickleType.Define("NSNull"), valueType, "null", null), FickleType.Define("id"))), valueType);
}
else
{
outputValue = Expression.Convert(parsedValue, valueType);
}
var secondIf = Expression.IfThenElse
(
Expression.TypeIs(value, FickleType.Define("NSString")),
FickleExpression.Block
(
new ParameterExpression[]
{
parsedValue,
success
},
Expression.IfThen
(
Expression.Not(Expression.Assign(success, Expression.Call(null, methodInfo, Expression.Convert(value, typeof(string)), parsedValue))),
Expression.Assign(parsedValue, Expression.Convert(Expression.Constant(0), underlyingType)).ToStatementBlock()
),
processOutputValue(outputValue)
),
firstIf
);
ifExpression = secondIf;
}
else
{
ifExpression = Expression.IfThen(Expression.TypeIs(value, typeof(string)), processOutputValue(Expression.Convert(Expression.Convert(value, typeof(object)), valueType)).ToBlock());
}
if (valueType.IsNullable())
{
ifExpression = Expression.IfThenElse
(
Expression.Equal(value, nsNull),
processOutputValue(Expression.Convert(nsNull, valueType)).ToBlock(),
ifExpression
);
}
return(ifExpression);
}
else if (valueType is FickleType && ((FickleType)valueType).ServiceClass != null)
{
outputValue = FickleExpression.New(valueType, "initWithPropertyDictionary", FickleExpression.Convert(value, "NSDictionary"));
return(Expression.IfThen(Expression.TypeIs(value, FickleType.Define("NSDictionary")), processOutputValue(outputValue).ToBlock()));
}
else if (valueType is FickleType && ((FickleType)valueType).ServiceEnum != null)
{
return(Expression.IfThen(Expression.TypeIs(value, FickleType.Define("NSNumber")), processOutputValue(value).ToBlock()));
}
else if (valueType is FickleListType)
{
var listType = valueType as FickleListType;
var arrayVar = FickleExpression.Variable("NSMutableArray", "array");
var variables = new[] { arrayVar };
var arrayItem = FickleExpression.Parameter(FickleType.Define("id"), "arrayItem");
var forEachBody = GetDeserializeExpressionProcessValueDeserializer(listType.ListElementType, arrayItem, c => FickleExpression.Call(arrayVar, "addObject", Expression.Convert(c, typeof(object))).ToStatement());
var ifThen = Expression.IfThen
(
Expression.TypeIs(value, FickleType.Define("NSArray")),
FickleExpression.Block
(
variables,
Expression.Assign(arrayVar, FickleExpression.New("NSMutableArray", "initWithCapacity", FickleExpression.Call(Expression.Convert(value, FickleType.Define("NSArray")), typeof(int), "count", null))).ToStatement(),
FickleExpression.ForEach(arrayItem, value, FickleExpression.Block(forEachBody)),
processOutputValue(Expression.Convert(arrayVar, valueType))
)
);
return(ifThen);
}
else
{
throw new InvalidOperationException("Unsupported property type: " + valueType);
}
}