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
17 #include "connector.h"
18
19 #include <meta/ext/serialization/serializer.h>
20
META_BEGIN_NAMESPACE()21 META_BEGIN_NAMESPACE()
22
23 bool Connector::AttachTo(const META_NS::IAttach::Ptr& target, const META_NS::IObject::Ptr& dataContext)
24 {
25 auto source = source_.lock();
26 auto dest = interface_cast<IMetadata>(target);
27 if (!source || !dest) {
28 CORE_LOG_E("Failed to attach Connector");
29 return false;
30 }
31
32 auto event = source->GetEvent(eventName_);
33 if (!event) {
34 CORE_LOG_E("Failed to attach Connector: No such event");
35 return false;
36 }
37
38 auto func = dest->GetFunction(funcName_);
39 if (!func) {
40 CORE_LOG_E("Failed to attach Connector: No such function");
41 return false;
42 }
43
44 handle_ = event->AddHandler(func);
45 return handle_ != IEvent::Token {};
46 }
47
DetachFrom(const META_NS::IAttach::Ptr & target)48 bool Connector::DetachFrom(const META_NS::IAttach::Ptr& target)
49 {
50 if (handle_) {
51 auto source = source_.lock();
52 if (source) {
53 auto event = source->GetEvent(eventName_);
54 if (!event) {
55 return false;
56 }
57 event->RemoveHandler(handle_);
58 handle_ = IEvent::Token {};
59 }
60 }
61 return true;
62 }
63
Connect(const IObject::Ptr & source,const BASE_NS::string & event,const BASE_NS::string & func)64 bool Connector::Connect(const IObject::Ptr& source, const BASE_NS::string& event, const BASE_NS::string& func)
65 {
66 source_ = interface_pointer_cast<IMetadata>(source);
67 eventName_ = event;
68 funcName_ = func;
69 return !source_.expired() && !eventName_.empty() && !funcName_.empty();
70 }
71
GetSource() const72 IObject::Ptr Connector::GetSource() const
73 {
74 return interface_pointer_cast<IObject>(source_);
75 }
GetEventName() const76 BASE_NS::string Connector::GetEventName() const
77 {
78 return eventName_;
79 }
GetFunctionName() const80 BASE_NS::string Connector::GetFunctionName() const
81 {
82 return funcName_;
83 }
84
Export(IExportContext & c) const85 ReturnError Connector::Export(IExportContext& c) const
86 {
87 return Serializer(c) & NamedValue("Source", source_) & NamedValue("Event", eventName_) &
88 NamedValue("Function", funcName_);
89 }
Import(IImportContext & c)90 ReturnError Connector::Import(IImportContext& c)
91 {
92 IMetadata::Ptr p;
93 Serializer ser(c);
94 ser& NamedValue("Source", p) & NamedValue("Event", eventName_) & NamedValue("Function", funcName_);
95 if (ser && p) {
96 source_ = p;
97 }
98 return ser;
99 }
100
101 META_END_NAMESPACE()
102