NullValue.hpp
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1 /*
2 
3  This file is part of OpenFLUID software
4  Copyright(c) 2007, INRA - Montpellier SupAgro
5 
6 
7  == GNU General Public License Usage ==
8 
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21 
22 
23  == Other Usage ==
24 
25  Other Usage means a use of OpenFLUID that is inconsistent with the GPL
26  license, and requires a written agreement between You and INRA.
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30 */
31 
32 
33 
34 /**
35  @file NullValue.hpp
36 
37  @author Jean-Christophe FABRE <jean-christophe.fabre@supagro.inra.fr>
38  */
39 
40 
41 #ifndef __OPENFLUID_CORE_NULLVALUE_HPP__
42 #define __OPENFLUID_CORE_NULLVALUE_HPP__
43 
44 
45 
46 
47 #include <openfluid/core/Value.hpp>
48 #include <openfluid/dllexport.hpp>
49 
50 
51 namespace openfluid { namespace core {
52 
53 /**
54 NullValue is a container for null value, containing no data.\n
55 
56 \see Value
57 */
59 {
60  public:
61 
62  /**
63  Default constructor
64  */
66  { };
67 
68  /**
69  Copy constructor
70  */
71  NullValue(const NullValue& /*Val*/): Value()
72  { };
73 
74  virtual ~NullValue()
75  { };
76 
77  inline Type getType() const
78  { return Value::NULLL; };
79 
80  Value* clone() const
81  { return new NullValue(*this); };
82 
83  inline bool isSimple() const
84  { return false; };
85 
86  inline bool isCompound() const
87  { return false; };
88 
89  void writeToStream(std::ostream& OutStm) const;
90 
91  void writeQuotedToStream(std::ostream& OutStm) const
92  { writeToStream(OutStm); }
93 };
94 
95 
96 } } // namespaces
97 
98 
99 
100 #endif /* __OPENFLUID_CORE_NULLVALUE_HPP__ */
NullValue()
Definition: NullValue.hpp:65
Definition: Value.hpp:64
virtual ~NullValue()
Definition: NullValue.hpp:74
void writeQuotedToStream(std::ostream &OutStm) const
Definition: NullValue.hpp:91
bool isCompound() const
Definition: NullValue.hpp:86
Value * clone() const
Definition: NullValue.hpp:80
Type
Definition: Value.hpp:68
Definition: Value.hpp:68
Type getType() const
Definition: NullValue.hpp:77
Definition: ApplicationException.hpp:47
Definition: NullValue.hpp:58
#define OPENFLUID_API
Definition: dllexport.hpp:87
NullValue(const NullValue &)
Definition: NullValue.hpp:71
bool isSimple() const
Definition: NullValue.hpp:83