1 /*
2 * Copyright (c) 2024 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #ifndef META_API_PROPERTY_CUSTOM_VALUE_H
17 #define META_API_PROPERTY_CUSTOM_VALUE_H
18
19 #include <meta/interface/interface_helpers.h>
20 #include <meta/interface/property/intf_property.h>
21
META_BEGIN_NAMESPACE()22 META_BEGIN_NAMESPACE()
23
24 /// Helper that maps IValue GetVAlue/SetValue to corresponding function pointers
25 template<typename Type, typename GetFunc, typename SetFunc>
26 class CustomValue : public IntroduceInterfaces<IValue> {
27 public:
28 CustomValue(GetFunc gfunc, SetFunc sfunc) : gfunc_(BASE_NS::move(gfunc)), sfunc_(BASE_NS::move(sfunc)) {}
29
30 AnyReturnValue SetValue(const IAny& any) override
31 {
32 Type value {};
33 auto res = any.GetValue(value);
34 if (res) {
35 if (sfunc_(value)) {
36 res = any_.SetValue(value);
37 } else {
38 res = AnyReturn::FAIL;
39 }
40 }
41 return res;
42 }
43 const IAny& GetValue() const override
44 {
45 auto value = gfunc_();
46 if (any_.SetValue(value)) {
47 return any_;
48 }
49 return GetObjectRegistry().GetPropertyRegister().InvalidAny();
50 }
51
52 bool IsCompatible(const TypeId& id) const override
53 {
54 return any_.IsCompatible(id);
55 }
56
57 private:
58 GetFunc gfunc_;
59 SetFunc sfunc_;
60 mutable Any<Type> any_;
61 };
62
63 /// Add custom value to property
64 template<typename Type, typename GetFunc, typename SetFunc>
AddCustomValue(const IProperty::Ptr & p,GetFunc gf,SetFunc sf)65 bool AddCustomValue(const IProperty::Ptr& p, GetFunc gf, SetFunc sf)
66 {
67 if (auto i = interface_cast<IStackProperty>(p)) {
68 auto val = CreateShared<CustomValue<Type, GetFunc, SetFunc>>(BASE_NS::move(gf), BASE_NS::move(sf));
69 return i->PushValue(val);
70 }
71 return false;
72 }
73
74 /// Add custom value that calls member functions for property
75 template<typename Type, typename Obj>
AddGetSetCustomValue(const Property<Type> & p,Obj * obj,Type (Obj::* getf)()const,bool (Obj::* setf)(const Type &))76 bool AddGetSetCustomValue(const Property<Type>& p, Obj* obj, Type (Obj::*getf)() const, bool (Obj::*setf)(const Type&))
77 {
78 IStackProperty::Ptr sp = interface_pointer_cast<IStackProperty>(p);
79 if (!sp) {
80 return false;
81 }
82 auto gf = [obj, getf, weak = BASE_NS::weak_ptr<IObject>(obj->GetSelf())]() -> Type {
83 if (auto lock = weak.lock()) {
84 return (obj->*getf)();
85 }
86 return Type {};
87 };
88 auto sf = [obj, setf, weak = BASE_NS::weak_ptr<IObject>(obj->GetSelf())](const Type& value) -> bool {
89 if (auto lock = weak.lock()) {
90 return (obj->*setf)(value);
91 }
92 return false;
93 };
94 return AddCustomValue<Type>(p.GetProperty(), BASE_NS::move(gf), BASE_NS::move(sf));
95 }
96
97 META_END_NAMESPACE()
98
99 #endif
100