client-cpp  0.6.1
EmptyDeltaType.hpp
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1 /*
2  * Copyright 2014 CyberVision, Inc.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef EMPTYDELTATYPE_HPP_
18 #define EMPTYDELTATYPE_HPP_
19 
20 #include "kaa/KaaDefaults.hpp"
21 
22 #ifdef KAA_USE_CONFIGURATION
23 
24 #include <list>
25 
26 #include <avro/Generic.hh>
27 
29 
30 namespace kaa {
31 
32 class EmptyDeltaType : public IDeltaType {
33 public:
38  virtual bool isDefault() {
39  return false;
40  }
41 
46  virtual bool isReset() {
47  return false;
48  }
49 
54  virtual const DeltaValue& getNewValue() {
55  static DeltaValue empty;
56  return empty;
57  }
58 
63  virtual const RemovedItems& getRemovedItems() {
64  static RemovedItems emptyHandlerIdList;
65  return emptyHandlerIdList;
66  }
67 
72  virtual const AddedItems& getAddedItems() {
73  static AddedItems emptyAddedItemsList;
74  return emptyAddedItemsList;
75  }
76 
81  virtual std::string toString() const {
82  return std::string("null");
83  }
84 };
85 
86 } /* namespace kaa */
87 
88 #endif
89 
90 #endif /* EMPTYDELTATYPE_HPP_ */