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delayedparameter.hh
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1 /* -*- mia-c++ -*-
2  *
3  * This file is part of MIA - a toolbox for medical image analysis
4  * Copyright (c) Leipzig, Madrid 1999-2017 Gert Wollny
5  *
6  * MIA is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 3 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with MIA; if not, see <http://www.gnu.org/licenses/>.
18  *
19  */
20 
21 #ifndef mia_core_delayedparameter_hh
22 #define mia_core_delayedparameter_hh
23 
24 #include <string>
25 #include <stdexcept>
26 
27 
28 #include <mia/core/defines.hh>
29 #include <mia/core/datapool.hh>
30 #include <mia/core/errormacro.hh>
31 
33 
34 
45 template <typename T>
47 {
48 public:
49 
50  TDelayedParameter() = default;
51 
57  TDelayedParameter(const std::string& key);
58 
63  const T get() const;
64 
69  bool pool_has_key() const;
70 
75  bool key_is_valid() const;
76 
77  const std::string& get_key() const;
78 private:
79  std::string m_key;
80 };
81 
82 
83 template <typename T>
85  m_key(key)
86 {
87 }
88 
89 
90 template <typename T>
92 {
93  if (!(CDatapool::instance().has_key(m_key))) {
94  throw create_exception<std::invalid_argument>("TDelayedParameter::get(): Key '", m_key,
95  "' is not available in the data pool");
96  }
97 
98  return boost::any_cast<T>(CDatapool::instance().get(m_key));
99 }
100 
101 template <typename T>
103 {
104  return CDatapool::instance().has_key(m_key);
105 }
106 
107 
108 template <typename T>
110 {
111  return !m_key.empty();
112 }
113 
114 template <typename T>
115 const std::string& TDelayedParameter<T>::get_key() const
116 {
117  return m_key;
118 }
119 
121 
122 #endif
static CDatapool & instance()
bool has_key(const std::string &key) const
A parameter proxy object with a key to identify it.
const T get() const
bool key_is_valid() const
const std::string & get_key() const
bool pool_has_key() const
TDelayedParameter()=default
#define NS_MIA_BEGIN
conveniance define to start the mia namespace
Definition: defines.hh:33
#define NS_MIA_END
conveniance define to end the mia namespace
Definition: defines.hh:36