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////////////////////////////////////////////////////////////////////////////
//
// 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 "RLMClassInfo.hpp"
#import "RLMDecimal128_Private.hpp"
#import "RLMObjectId_Private.hpp"
#import "RLMUUID_Private.hpp"
#import "RLMUtil.hpp"
#import <realm/object-store/object_accessor.hpp>
@class RLMRealm;
class RLMClassInfo;
class RLMObservationTracker;
typedef NS_ENUM(NSUInteger, RLMUpdatePolicy);
// 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; }
};
// The subset of RLMAccessorContext which does not require any member variables.
// Use this if you require to box/unbox types and you do not have access to the
// parent object or realm.
struct RLMStatelessAccessorContext {
static id box(bool v) { return @(v); }
static id box(double v) { return @(v); }
static id box(float v) { return @(v); }
static id box(long long v) { return @(v); }
static id box(realm::StringData v) { return RLMStringDataToNSString(v) ?: NSNull.null; }
static id box(realm::BinaryData v) { return RLMBinaryDataToNSData(v) ?: NSNull.null; }
static id box(realm::Timestamp v) { return RLMTimestampToNSDate(v) ?: NSNull.null; }
static id box(realm::Decimal128 v) { return v.is_null() ? NSNull.null : [[RLMDecimal128 alloc] initWithDecimal128:v]; }
static id box(realm::ObjectId v) { return [[RLMObjectId alloc] initWithValue:v]; }
static id box(realm::UUID v) { return [[NSUUID alloc] initWithRealmUUID:v]; }
static id box(realm::util::Optional<bool> v) { return v ? @(*v) : NSNull.null; }
static id box(realm::util::Optional<double> v) { return v ? @(*v) : NSNull.null; }
static id box(realm::util::Optional<float> v) { return v ? @(*v) : NSNull.null; }
static id box(realm::util::Optional<int64_t> v) { return v ? @(*v) : NSNull.null; }
static id box(realm::util::Optional<realm::ObjectId> v) { return v ? box(*v) : NSNull.null; }
static id box(realm::util::Optional<realm::UUID> v) { return v ? box(*v) : NSNull.null; }
template<typename T>
static T unbox(id v);
template<typename Func>
static void enumerate_collection(__unsafe_unretained const id v, Func&& func) {
id enumerable = RLMAsFastEnumeration(v) ?: v;
for (id value in enumerable) {
func(value);
}
}
template<typename Func>
static void enumerate_dictionary(__unsafe_unretained const id v, Func&& func) {
id enumerable = RLMAsFastEnumeration(v) ?: v;
for (id key in enumerable) {
func(unbox<realm::StringData>(key), v[key]);
}
}
static bool is_null(id v) noexcept { return v == NSNull.null; }
static id null_value() noexcept { return NSNull.null; }
static id no_value() noexcept { return nil; }
static bool allow_missing(id v) noexcept { return [v isKindOfClass:[NSArray class]]; }
static bool is_same_list(realm::List const& list, id v) noexcept;
static bool is_same_dictionary(realm::object_store::Dictionary const&, id) noexcept;
static bool is_same_set(realm::object_store::Set const&, id) noexcept;
static std::string print(id obj) { return [obj description].UTF8String; }
};
class RLMAccessorContext : public RLMStatelessAccessorContext {
public:
~RLMAccessorContext();
// Accessor context interface
RLMAccessorContext(RLMAccessorContext& parent, realm::Obj const& parent_obj, realm::Property const& property);
using RLMStatelessAccessorContext::box;
id box(realm::List&&);
id box(realm::Results&&);
id box(realm::Object&&);
id box(realm::Obj&&);
id box(realm::object_store::Dictionary&&);
id box(realm::object_store::Set&&);
id box(realm::Mixed);
void will_change(realm::Obj const&, realm::Property const&);
void will_change(realm::Object& obj, realm::Property const& prop) { will_change(obj.obj(), prop); }
void did_change();
RLMOptionalId value_for_property(id dict, realm::Property const&, size_t prop_index);
RLMOptionalId default_value_for_property(realm::ObjectSchema const&,
realm::Property const& prop);
template<typename T>
T unbox(__unsafe_unretained id const v, realm::CreatePolicy = realm::CreatePolicy::Skip, realm::ObjKey = {}) {
return RLMStatelessAccessorContext::unbox<T>(v);
}
template<>
realm::Obj unbox(id v, realm::CreatePolicy, realm::ObjKey);
template<>
realm::Mixed unbox(id v, realm::CreatePolicy, realm::ObjKey);
realm::Obj create_embedded_object();
// Internal API
RLMAccessorContext(RLMObjectBase *parentObject, const realm::Property *property = nullptr);
RLMAccessorContext(RLMObjectBase *parentObject, realm::ColKey);
RLMAccessorContext(RLMClassInfo& info);
// The property currently being accessed; needed for KVO things for boxing
// List and Results
RLMProperty *currentProperty;
std::pair<realm::Obj, bool>
createObject(id value, realm::CreatePolicy policy, bool forceCreate=false, realm::ObjKey existingKey={});
private:
__unsafe_unretained RLMRealm *const _realm;
RLMClassInfo& _info;
realm::Obj _parentObject;
RLMClassInfo* _parentObjectInfo = nullptr;
realm::ColKey _colKey;
// Cached default values dictionary to avoid having to call the class method
// for every property
NSDictionary *_defaultValues;
std::unique_ptr<RLMObservationTracker> _observationHelper;
id defaultValue(NSString *key);
id propertyValue(id obj, size_t propIndex, __unsafe_unretained RLMProperty *const prop);
};
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