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_SRC_LOADERS_JSON_CONTENT_LOADER_H
17 #define META_SRC_LOADERS_JSON_CONTENT_LOADER_H
18
19 #include <meta/api/property/property_event_handler.h>
20 #include <meta/ext/object.h>
21 #include <meta/interface/builtin_objects.h>
22 #include <meta/interface/loaders/intf_file_content_loader.h>
23 #include <meta/interface/serialization/intf_ser_node.h>
24
META_BEGIN_NAMESPACE()25 META_BEGIN_NAMESPACE()
26
27 class JsonContentLoader final
28 : public ObjectFwd<JsonContentLoader, ClassId::JsonContentLoader, ClassId::Object, IFileContentLoader> {
29 META_IMPLEMENT_INTERFACE_PROPERTY(IFileContentLoader, bool, Cached)
30 public:
31 bool Build(const IMetadata::Ptr& data) override;
32
33 public: // IDynamicContentLoader
34 META_IMPLEMENT_INTERFACE_EVENT(IDynamicContentLoader, IOnChanged, ContentChanged)
35 void Reload() override;
36
37 public: // IFileContentLoader
38 bool SetFile(CORE_NS::IFile::Ptr file) override;
39 IObject::Ptr Create(const IObject::Ptr& params) override;
40
41 private:
42 IObject::Ptr LoadCached();
43 bool UpdateTree();
44
45 private:
46 CORE_NS::IFile::Ptr file_;
47 PropertyChangedEventHandler cachedChangedHandler_;
48 ISerNode::Ptr tree_;
49 };
50
51 META_END_NAMESPACE()
52
53 #endif
54