--- /dev/null
+////////////////////////////////////////////////////////////////////////////
+//
+// Copyright 2017 Realm Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+////////////////////////////////////////////////////////////////////////////
+
+#import "RLMAccessor.h"
+
+#import "object_accessor.hpp"
+
+#import "RLMUtil.hpp"
+
+@class RLMRealm;
+class RLMClassInfo;
+class RLMObservationInfo;
+
+// realm::util::Optional<id> doesn't work because Objective-C types can't
+// be members of unions with ARC, so this covers the subset of Optional that we
+// actually need.
+struct RLMOptionalId {
+ id value;
+ RLMOptionalId(id value) : value(value) { }
+ explicit operator bool() const noexcept { return value; }
+ id operator*() const noexcept { return value; }
+};
+
+class RLMAccessorContext {
+public:
+ // Accessor context interface
+ RLMAccessorContext(RLMAccessorContext& parent, realm::Property const& property);
+
+ id box(realm::List&&);
+ id box(realm::Results&&);
+ id box(realm::Object&&);
+ id box(realm::RowExpr);
+
+ id box(bool v) { return @(v); }
+ id box(double v) { return @(v); }
+ id box(float v) { return @(v); }
+ id box(long long v) { return @(v); }
+ id box(realm::StringData v) { return RLMStringDataToNSString(v) ?: NSNull.null; }
+ id box(realm::BinaryData v) { return RLMBinaryDataToNSData(v) ?: NSNull.null; }
+ id box(realm::Timestamp v) { return RLMTimestampToNSDate(v) ?: NSNull.null; }
+ id box(realm::Mixed v) { return RLMMixedToObjc(v); }
+
+ id box(realm::util::Optional<bool> v) { return v ? @(*v) : NSNull.null; }
+ id box(realm::util::Optional<double> v) { return v ? @(*v) : NSNull.null; }
+ id box(realm::util::Optional<float> v) { return v ? @(*v) : NSNull.null; }
+ id box(realm::util::Optional<int64_t> v) { return v ? @(*v) : NSNull.null; }
+
+ void will_change(realm::Row const&, realm::Property const&);
+ void will_change(realm::Object& obj, realm::Property const& prop) { will_change(obj.row(), prop); }
+ void did_change();
+
+ RLMOptionalId value_for_property(id dict, std::string const&, size_t prop_index);
+ RLMOptionalId default_value_for_property(realm::ObjectSchema const&,
+ std::string const& prop);
+
+ bool is_same_list(realm::List const& list, id v) const noexcept;
+
+ template<typename Func>
+ void enumerate_list(__unsafe_unretained const id v, Func&& func) {
+ for (id value in v) {
+ func(value);
+ }
+ }
+
+ template<typename T>
+ T unbox(id v, bool create = false, bool update = false);
+
+ bool is_null(id v) { return v == NSNull.null; }
+ id null_value() { return NSNull.null; }
+ id no_value() { return nil; }
+ bool allow_missing(id v) { return [v isKindOfClass:[NSArray class]]; }
+
+ std::string print(id obj) { return [obj description].UTF8String; }
+
+ // Internal API
+ RLMAccessorContext(RLMObjectBase *parentObject, const realm::Property *property = nullptr);
+ RLMAccessorContext(RLMRealm *realm, RLMClassInfo& info, bool promote=true);
+
+ // The property currently being accessed; needed for KVO things for boxing
+ // List and Results
+ RLMProperty *currentProperty;
+
+private:
+ __unsafe_unretained RLMRealm *const _realm;
+ RLMClassInfo& _info;
+ // If true, promote unmanaged RLMObjects passed to box() with create=true
+ // rather than copying them
+ bool _promote_existing = true;
+ // Parent object of the thing currently being processed, for KVO purposes
+ __unsafe_unretained RLMObjectBase *const _parentObject = nil;
+
+ // Cached default values dictionary to avoid having to call the class method
+ // for every property
+ NSDictionary *_defaultValues;
+
+ RLMObservationInfo *_observationInfo = nullptr;
+ NSString *_kvoPropertyName = nil;
+
+ id defaultValue(NSString *key);
+ id propertyValue(id obj, size_t propIndex, __unsafe_unretained RLMProperty *const prop);
+};