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28 
29 #ifndef FILTER_H
30 #define FILTER_H
31 
32 #include <string>
33 #include <list>
34 
35 #include "libsamplemacros.h"
36 
37 class Intersection;
38 
39 class LIBSAMPLE_API Filter
40 {
41 };
42 
43 class LIBSAMPLE_API Data : public Filter
44 {
45 
46 public:
47     enum Field {
48         Name,
49         Album,
50         Year
51     };
52 
53     Data(Field field, std::string value);
54 
field()55     Field field() const { return m_field; }
value()56     std::string value() const { return m_value; }
57 
58 private:
59     Field m_field;
60     std::string m_value;
61 };
62 
63 class LIBSAMPLE_API Union : public Filter
64 {
65 public:
66 
67     Union(const Data&);
68     Union(const Intersection&);
Union()69     Union() {};
70     Union(const Union&);
71 
filters()72     std::list<Filter> filters() const { return m_filters; }
addFilter(const Filter & data)73     void addFilter(const Filter& data) { m_filters.push_back(data); }
74 
75 private:
76     std::list<Filter> m_filters;
77 };
78 
79 class LIBSAMPLE_API Intersection : public Filter
80 {
81 public:
82 
83     Intersection(const Data&);
84     Intersection(const Union&);
Intersection()85     Intersection() {};
86     Intersection(const Intersection&);
87 
filters()88     std::list<Filter> filters() const { return m_filters; }
addFilter(const Filter & data)89     void addFilter(const Filter& data) { m_filters.push_back(data); }
90 
91 private:
92     std::list<Filter> m_filters;
93 };
94 
95 LIBSAMPLE_API Intersection operator&(const Intersection& a, const Intersection& b);
96 
97 #endif // FILTER_H
98 
99 
100