private Expression GetXDocumentReaderProxy(IBindingValueInfo valueInfo)
{
MethodInfo parseInfo = typeof(XDocument).GetMethod("Parse", new[] { typeof(string) });
Expression value = valueInfo.Value;
Expression stringValue = value.Type == typeof(string) ? value : Expression.Convert(value, typeof(string));
Expression isNull = Expression.ReferenceEqual(valueInfo.Value, Expression.Constant(null));
Expression parseXml = Expression.Call(parseInfo, stringValue);
return(Expression.Condition(isNull, Expression.Default(typeof(XDocument)), parseXml));
}
private Expression GetValueReaderProxy(IBindingValueInfo valueInfo)
{
Expression value = valueInfo.Value;
if (value.Type != typeof(object) && value.Type != typeof(string))
{
throw BindingException.Create(valueInfo.Metadata, $"Cannot deserialize JSON from type '{value.Type.GetSanitizedName()}'.");
}
Expression nullCheck = null;
if (valueInfo.CanBeDbNull)
{
nullCheck = Expression.TypeIs(value, typeof(DBNull));
}
if (valueInfo.CanBeNull)
{
Expression isNull = Expression.ReferenceEqual(value, Expression.Constant(null, value.Type));
nullCheck = nullCheck == null ? isNull : Expression.AndAlso(nullCheck, isNull);
}
if (value.Type == typeof(object))
{
value = Expression.Convert(value, typeof(string));
}
Expression targetValue;
if (valueInfo.TargetType == typeof(JsonDocument))
{
targetValue = this.GetParseDocumentExpression(valueInfo.Metadata, value);
}
else if (valueInfo.TargetType == typeof(JsonElement))
{
targetValue = this.GetParseElementExpression(valueInfo.Metadata, value);
}
else
{
targetValue = this.GetDeserializeExpression(valueInfo.Metadata, value, valueInfo.Helper);
}
if (nullCheck != null)
{
return(Expression.Condition(nullCheck, Expression.Default(targetValue.Type), targetValue));
}
return(targetValue);
}
private Expression GetValueReaderProxy(IBindingValueInfo valueInfo)
{
Expression value = valueInfo.Value;
if (value.Type != typeof(object) && value.Type != typeof(string))
{
throw BindingException.FromMetadata(valueInfo.Metadata, $"Cannot deserialize JSON from type '{value.Type.GetSanitizedName()}'.");
}
Expression nullCheck = null;
if (valueInfo.CanBeDbNull)
{
nullCheck = Expression.TypeIs(value, typeof(DBNull));
}
if (valueInfo.CanBeNull)
{
Expression isNull = Expression.ReferenceEqual(value, Expression.Constant(null, value.Type));
if (nullCheck == null)
{
nullCheck = isNull;
}
else
{
nullCheck = Expression.AndAlso(nullCheck, isNull);
}
}
if (value.Type == typeof(object))
{
value = Expression.Convert(value, typeof(string));
}
Expression jsonValue = this.GetJsonDeserializer(valueInfo.Metadata, value, valueInfo.Helper);
if (nullCheck != null)
{
return(Expression.Condition(nullCheck, Expression.Default(jsonValue.Type), jsonValue));
}
return(jsonValue);
}
