1 // © 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /*
4 **********************************************************************
5 * Copyright (c) 2004-2015, International Business Machines
6 * Corporation and others. All Rights Reserved.
7 **********************************************************************
8 * Author: Alan Liu
9 * Created: April 26, 2004
10 * Since: ICU 3.0
11 **********************************************************************
12 */
13 #ifndef __MEASURE_H__
14 #define __MEASURE_H__
15
16 #include "unicode/utypes.h"
17
18 #if U_SHOW_CPLUSPLUS_API
19
20 /**
21 * \file
22 * \brief C++ API: MeasureUnit object.
23 */
24
25 #if !UCONFIG_NO_FORMATTING
26
27 #include "unicode/fmtable.h"
28
29 U_NAMESPACE_BEGIN
30
31 class MeasureUnit;
32
33 /**
34 * An amount of a specified unit, consisting of a number and a Unit.
35 * For example, a length measure consists of a number and a length
36 * unit, such as feet or meters.
37 *
38 * <p>Measure objects are formatted by MeasureFormat.
39 *
40 * <p>Measure objects are immutable.
41 *
42 * @author Alan Liu
43 * @stable ICU 3.0
44 */
45 class U_I18N_API Measure: public UObject {
46 public:
47 /**
48 * Construct an object with the given numeric amount and the given
49 * unit. After this call, the caller must not delete the given
50 * unit object.
51 * @param number a numeric object; amount.isNumeric() must be true
52 * @param adoptedUnit the unit object, which must not be NULL
53 * @param ec input-output error code. If the amount or the unit
54 * is invalid, then this will be set to a failing value.
55 * @stable ICU 3.0
56 */
57 Measure(const Formattable& number, MeasureUnit* adoptedUnit,
58 UErrorCode& ec);
59
60 /**
61 * Copy constructor
62 * @stable ICU 3.0
63 */
64 Measure(const Measure& other);
65
66 /**
67 * Assignment operator
68 * @stable ICU 3.0
69 */
70 Measure& operator=(const Measure& other);
71
72 /**
73 * Return a polymorphic clone of this object. The result will
74 * have the same class as returned by getDynamicClassID().
75 * @stable ICU 3.0
76 */
77 virtual Measure* clone() const;
78
79 /**
80 * Destructor
81 * @stable ICU 3.0
82 */
83 virtual ~Measure();
84
85 /**
86 * Equality operator. Return true if this object is equal
87 * to the given object.
88 * @stable ICU 3.0
89 */
90 bool operator==(const UObject& other) const;
91
92 /**
93 * Return a reference to the numeric value of this object. The
94 * numeric value may be of any numeric type supported by
95 * Formattable.
96 * @stable ICU 3.0
97 */
98 inline const Formattable& getNumber() const;
99
100 /**
101 * Return a reference to the unit of this object.
102 * @stable ICU 3.0
103 */
104 inline const MeasureUnit& getUnit() const;
105
106 /**
107 * Return the class ID for this class. This is useful only for comparing to
108 * a return value from getDynamicClassID(). For example:
109 * <pre>
110 * . Base* polymorphic_pointer = createPolymorphicObject();
111 * . if (polymorphic_pointer->getDynamicClassID() ==
112 * . erived::getStaticClassID()) ...
113 * </pre>
114 * @return The class ID for all objects of this class.
115 * @stable ICU 53
116 */
117 static UClassID U_EXPORT2 getStaticClassID(void);
118
119 /**
120 * Returns a unique class ID POLYMORPHICALLY. Pure virtual override. This
121 * method is to implement a simple version of RTTI, since not all C++
122 * compilers support genuine RTTI. Polymorphic operator==() and clone()
123 * methods call this method.
124 *
125 * @return The class ID for this object. All objects of a
126 * given class have the same class ID. Objects of
127 * other classes have different class IDs.
128 * @stable ICU 53
129 */
130 virtual UClassID getDynamicClassID(void) const override;
131
132 protected:
133 /**
134 * Default constructor.
135 * @stable ICU 3.0
136 */
137 Measure();
138
139 private:
140 /**
141 * The numeric value of this object, e.g. 2.54 or 100.
142 */
143 Formattable number;
144
145 /**
146 * The unit of this object, e.g., "millimeter" or "JPY". This is
147 * owned by this object.
148 */
149 MeasureUnit* unit;
150 };
151
getNumber()152 inline const Formattable& Measure::getNumber() const {
153 return number;
154 }
155
getUnit()156 inline const MeasureUnit& Measure::getUnit() const {
157 return *unit;
158 }
159
160 U_NAMESPACE_END
161
162 #endif // !UCONFIG_NO_FORMATTING
163
164 #endif /* U_SHOW_CPLUSPLUS_API */
165
166 #endif // __MEASURE_H__
167