1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
#include "indexer/drules_selector.hpp"
#include "indexer/drules_selector_parser.hpp"
#include "indexer/ftypes_matcher.hpp"
#include "indexer/scales.hpp"
#include "base/assert.hpp"
#include "base/logging.hpp"
namespace drule
{
namespace
{
class CompositeSelector : public ISelector
{
public:
explicit CompositeSelector(size_t capacity)
{
m_selectors.reserve(capacity);
}
void Add(unique_ptr<ISelector> && selector)
{
m_selectors.emplace_back(move(selector));
}
// ISelector overrides:
bool Test(FeatureType const & ft) const override
{
for (auto const & selector : m_selectors)
if (!selector->Test(ft))
return false;
return true;
}
private:
vector<unique_ptr<ISelector>> m_selectors;
};
// Runtime feature style selector implementation
template <typename TType>
class Selector : public ISelector
{
public:
// Signature of function which takes a property from a feature
typedef bool (*TGetFeatureTagValueFn)(FeatureType const &, TType & value);
Selector(TGetFeatureTagValueFn fn, SelectorOperatorType op, TType const & value)
: m_getFeatureValueFn(fn), m_evalFn(nullptr), m_value(value)
{
ASSERT(fn != nullptr, ());
switch (op)
{
case SelectorOperatorUnknown: m_evalFn = nullptr; break;
case SelectorOperatorNotEqual: m_evalFn = &Selector<TType>::NotEqual; break;
case SelectorOperatorLessOrEqual: m_evalFn = &Selector<TType>::LessOrEqual; break;
case SelectorOperatorGreaterOrEqual: m_evalFn = &Selector<TType>::GreaterOrEqual; break;
case SelectorOperatorEqual: m_evalFn = &Selector<TType>::Equal; break;
case SelectorOperatorLess: m_evalFn = &Selector<TType>::Less; break;
case SelectorOperatorGreater: m_evalFn = &Selector<TType>::Greater; break;
case SelectorOperatorIsNotSet: m_evalFn = &Selector<TType>::IsNotSet; break;
case SelectorOperatorIsSet: m_evalFn = &Selector<TType>::IsSet; break;
}
ASSERT(m_evalFn != nullptr, ("Unknown or unexpected selector operator type"));
if (nullptr == m_evalFn)
m_evalFn = &Selector<TType>::Unknown;
}
// ISelector overrides:
bool Test(FeatureType const & ft) const override
{
TType tagValue;
if (!m_getFeatureValueFn(ft, tagValue))
return false;
return (this->*m_evalFn)(tagValue);
}
private:
bool Unknown(TType const &) const { return false; }
bool NotEqual(TType const & tagValue) const { return tagValue != m_value; }
bool LessOrEqual(TType const & tagValue) const { return tagValue <= m_value; }
bool GreaterOrEqual(TType const & tagValue) const { return tagValue >= m_value; }
bool Equal(TType const & tagValue) const { return tagValue == m_value; }
bool Less(TType const & tagValue) const { return tagValue < m_value; }
bool Greater(TType const & tagValue) const { return tagValue > m_value; }
bool IsNotSet(TType const & tagValue) const { return tagValue == TType(); }
bool IsSet(TType const & tagValue) const { return tagValue != TType(); }
typedef bool (Selector<TType>::*TOperationFn)(TType const &) const;
TGetFeatureTagValueFn m_getFeatureValueFn;
TOperationFn m_evalFn;
TType const m_value;
};
// Feature tag value evaluator for tag 'population'
bool GetPopulation(FeatureType const & ft, uint64_t & population)
{
population = ftypes::GetPopulation(ft);
return true;
}
// Feature tag value evaluator for tag 'name'
bool GetName(FeatureType const & ft, string & name)
{
ft.GetReadableName(name);
return true;
}
// Feature tag value evaluator for tag 'bbox_area' (bounding box area in sq.meters)
bool GetBoundingBoxArea(FeatureType const & ft, double & sqM)
{
if (feature::GEOM_AREA != ft.GetFeatureType())
return false;
m2::RectD const rect = ft.GetLimitRect(scales::GetUpperScale());
sqM = MercatorBounds::AreaOnEarth(rect.LeftTop(), rect.LeftBottom(), rect.RightBottom()) +
MercatorBounds::AreaOnEarth(rect.LeftTop(), rect.RightTop(), rect.RightBottom());
return true;
}
// Feature tag value evaluator for tag 'rating'
bool GetRating(FeatureType const & ft, double & rating)
{
if (!ftypes::IsHotelChecker::Instance()(ft))
return false;
double constexpr kDefaultRating = 0.0;
string ratingStr = ft.GetMetadata().Get(feature::Metadata::FMD_RATING);
if (ratingStr.empty() || !strings::to_double(ratingStr, rating))
rating = kDefaultRating;
return true;
}
// Add new tag value evaluator here
} // namespace
unique_ptr<ISelector> ParseSelector(string const & str)
{
SelectorExpression e;
if (!ParseSelector(str, e))
{
// bad string format
LOG(LDEBUG, ("Invalid selector format:", str));
return unique_ptr<ISelector>();
}
if (e.m_tag == "population")
{
uint64_t value = 0;
if (!e.m_value.empty() && !strings::to_uint64(e.m_value, value))
{
// bad string format
LOG(LDEBUG, ("Invalid selector:", str));
return unique_ptr<ISelector>();
}
return make_unique<Selector<uint64_t>>(&GetPopulation, e.m_operator, value);
}
else if (e.m_tag == "name")
{
return make_unique<Selector<string>>(&GetName, e.m_operator, e.m_value);
}
else if (e.m_tag == "bbox_area")
{
double value = 0;
if (!e.m_value.empty() && (!strings::to_double(e.m_value, value) || value < 0))
{
// bad string format
LOG(LDEBUG, ("Invalid selector:", str));
return unique_ptr<ISelector>();
}
return make_unique<Selector<double>>(&GetBoundingBoxArea, e.m_operator, value);
}
else if (e.m_tag == "rating")
{
double value = 0;
if (!e.m_value.empty() && (!strings::to_double(e.m_value, value) || value < 0))
{
// bad string format
LOG(LDEBUG, ("Invalid selector:", str));
return unique_ptr<ISelector>();
}
return make_unique<Selector<double>>(&GetRating, e.m_operator, value);
}
// Add new tag here
// unrecognized selector
LOG(LDEBUG, ("Unrecognized selector:", str));
return unique_ptr<ISelector>();
}
unique_ptr<ISelector> ParseSelector(vector<string> const & strs)
{
unique_ptr<CompositeSelector> cs = make_unique<CompositeSelector>(strs.size());
for (string const & str : strs)
{
unique_ptr<ISelector> s = ParseSelector(str);
if (nullptr == s)
{
LOG(LDEBUG, ("Invalid composite selector:", str));
return unique_ptr<ISelector>();
}
cs->Add(move(s));
}
return unique_ptr<ISelector>(cs.release());
}
} // namespace drule
|
