author | hgs |
Mon, 09 Aug 2010 10:51:30 +0530 | |
changeset 14 | 8bd192d47aaa |
parent 0 | 671dee74050a |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* |
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*/ |
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|
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#include <stdlib.h> |
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#include <wchar.h> |
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#include <math.h> |
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|
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#include <algorithm> |
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#include <memory> |
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#include <vector> |
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#include "CLucene.h" |
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#include "CLucene/queryParser/MultiFieldQueryParser.h" |
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|
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#include "cpixtools.h" |
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#include "cpixhits.h" |
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#include "cpixsearch.h" |
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#include "cpixexc.h" |
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#include "document.h" |
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#include "iidxdb.h" |
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#include "initparams.h" |
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#include "cpixutil.h" |
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#include "indevicecfg.h" |
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#include "common/gpssort.h" |
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#include "common/cloners.h" |
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namespace |
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{ |
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// constant used to indicate an invalid Gps Longitude or Latitude value |
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static const float invalidGpsCoord = -360.00; |
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// constant used to indicate invalid distance value |
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static const float invalidDistance = 999999.99; |
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class GpsDistance |
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{ |
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private: |
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// not owned |
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lucene::document::Document * doc_; |
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// GPS coordinate extracted from clucene document |
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float gpsLat_; |
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float gpsLong_; |
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// distance from a reference point |
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float distance_; |
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// for shared ptr behaviour |
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mutable const GpsDistance * next_; |
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public: |
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// TODO private methods |
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void cleanup() |
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{ |
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delete doc_; |
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doc_ = NULL; |
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} |
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void enterIntoChain(const GpsDistance * chain, |
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const GpsDistance * p) |
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{ |
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p->next_ = chain->next_; |
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chain->next_ = p; |
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} |
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void exitFromChain() |
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{ |
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if (next_ == this) |
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{ |
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cleanup(); |
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} |
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else |
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{ |
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const GpsDistance |
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* next = next_, |
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* prev = next_; |
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for (; prev->next_ != this; prev = prev->next_) |
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; |
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|
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prev->next_ = next; |
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|
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doc_ = NULL; |
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} |
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} |
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void copyGutsFrom(const GpsDistance & that) |
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{ |
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doc_ = that.doc_; |
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gpsLat_ = that.gpsLat_; |
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gpsLong_ = that.gpsLong_; |
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112 |
distance_ = that.distance_; |
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113 |
} |
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|
114 |
|
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|
115 |
|
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116 |
GpsDistance(lucene::document::Document * doc, |
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117 |
float gpsLat, |
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float gpsLong) |
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119 |
: doc_(doc), |
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120 |
gpsLat_(gpsLat), |
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gpsLong_(gpsLong), |
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distance_(invalidDistance), |
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123 |
next_(NULL) |
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124 |
{ |
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125 |
next_ = this; |
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126 |
} |
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127 |
|
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128 |
|
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129 |
GpsDistance(const GpsDistance & that) |
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130 |
: doc_(NULL), |
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131 |
gpsLat_(0.0), |
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132 |
gpsLong_(0.0), |
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133 |
distance_(invalidDistance), |
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134 |
next_(NULL) |
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135 |
{ |
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136 |
enterIntoChain(&that, |
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137 |
this); |
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138 |
copyGutsFrom(that); |
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139 |
} |
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140 |
|
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141 |
|
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142 |
GpsDistance & operator=(const GpsDistance & that) |
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143 |
{ |
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if (this != &that) |
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145 |
{ |
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146 |
exitFromChain(); |
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147 |
enterIntoChain(&that, |
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148 |
this); |
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149 |
copyGutsFrom(that); |
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150 |
} |
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|
151 |
|
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152 |
return *this; |
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153 |
} |
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154 |
|
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155 |
|
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156 |
~GpsDistance() |
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157 |
{ |
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158 |
exitFromChain(); |
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159 |
} |
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160 |
|
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161 |
|
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162 |
void addField(lucene::document::Field & field) |
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163 |
{ |
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164 |
if (doc_ != NULL) |
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165 |
{ |
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166 |
doc_->add(field); |
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167 |
} |
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168 |
else |
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169 |
{ |
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170 |
THROW_CPIXEXC(PL_ERROR); |
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171 |
} |
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172 |
} |
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|
173 |
|
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|
174 |
|
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|
175 |
lucene::document::Document * release() |
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|
176 |
{ |
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177 |
lucene::document::Document |
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|
178 |
* rv = doc_; |
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|
179 |
|
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|
180 |
doc_ = NULL; |
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|
181 |
|
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|
182 |
return rv; |
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|
183 |
} |
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|
184 |
|
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|
185 |
|
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|
186 |
float distance() const |
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|
187 |
{ |
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|
188 |
return distance_; |
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|
189 |
} |
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|
190 |
|
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|
191 |
|
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|
192 |
void getDistanceStr(wchar_t buf[], |
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|
193 |
size_t bufSize) const |
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|
194 |
{ |
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|
195 |
static const double |
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196 |
metersInKilometer = 1000.0; |
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|
197 |
|
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|
198 |
if (distance_ == invalidDistance) |
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|
199 |
{ |
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|
200 |
wcsncpy(buf, |
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|
201 |
L"(unknown)", |
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|
202 |
bufSize); |
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|
203 |
} |
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|
204 |
else |
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|
205 |
{ |
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|
206 |
// FIXME: This is temporary fix to do distance formatting in non-leaking way |
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|
207 |
double d = (distance() / metersInKilometer); |
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|
208 |
snwprintf(buf, |
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|
209 |
bufSize, |
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|
210 |
L"%d.%d", |
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|
211 |
(int)d, |
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|
212 |
(((int)(d*10))%10)); |
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|
213 |
|
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|
214 |
|
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|
215 |
/* FIXME: snwprintf() with floating point formatting '%.1f' leaks |
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|
216 |
double d = distance() / metersInKilometer; |
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|
217 |
snwprintf(buf, |
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|
218 |
bufSize, |
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|
219 |
L"%.1f", |
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|
220 |
d);*/ |
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|
221 |
} |
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|
222 |
} |
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diff
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|
223 |
|
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diff
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|
224 |
|
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diff
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|
225 |
/** |
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* Sets the distance_ to the distance between this point and |
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* the reference point, in meters, provided both GSP |
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* coordinates are sensible, otherwise it leaves it |
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* invalidDistance. |
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*/ |
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void calculateDistanceFrom(float refPointGpsLat, |
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float refPointGpsLong) |
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{ |
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if (refPointGpsLat != invalidGpsCoord |
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&& refPointGpsLong != invalidGpsCoord |
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&& gpsLat_ != invalidGpsCoord |
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&& gpsLong_ != invalidGpsCoord) |
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{ |
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// Earth radius in meters |
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float distance_rad = 0; |
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float pi = 3.14159265; |
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float radius = 6371000; |
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float ref_latrad = refPointGpsLat * pi /180; |
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float ref_longrad = refPointGpsLong * pi /180; |
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float dst_latrad = gpsLat_ * pi /180; |
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float dst_longrad = gpsLong_ * pi /180; |
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|
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float t1, t2, t3, t4, t5, t6, t7, t8; |
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|
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t1 = sin((dst_latrad - ref_latrad)/2); |
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t2 = cos(ref_latrad); |
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t3 = cos(dst_latrad); |
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t4 = sin((dst_longrad - ref_longrad)/2); |
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t5 = t1*t1 + t2*t3*t4*t4; |
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t6 = sqrt(t5); |
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t7 = sqrt(1-t5); |
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t8 = atan2(t6, t7); |
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distance_rad = 2*t8; |
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|
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// return distance in meters |
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distance_ = distance_rad * radius; |
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} |
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} |
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}; |
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|
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|
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bool operator<(const GpsDistance & left, |
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const GpsDistance & right) |
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{ |
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return left.distance() < right.distance(); |
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} |
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|
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|
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/** |
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* For all GpsDistance structs in the vector, it calculates the |
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* distance from a given reference point, sets the |
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* GpsDistance.distance_ member as well as defines the |
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* LDISTANCE_FIELD on the lucene document pointed by the |
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* GpsDistance.doc_ member. |
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* |
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* @param locations the vector with the GpsDistance structs the |
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* calculate the distances for. Precondition: GpsDinstance |
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* instances must have their doc_, gpsLat_ and gpsLong_ members |
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* set. |
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* |
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* @param refPointGpsLat GPS latitude of reference point |
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* |
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* @param refPointGpsLong GPS longitude of reference point |
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*/ |
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void calculateDistances(std::vector<GpsDistance> & locations, |
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const float refPointGpsLat, |
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const float refPointGpsLong) |
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{ |
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using namespace lucene::document; |
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using namespace std; |
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|
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for (vector<GpsDistance>::iterator i = locations.begin(); |
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i != locations.end(); |
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++i) |
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{ |
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i->calculateDistanceFrom(refPointGpsLat, |
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refPointGpsLong); |
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303 |
|
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wchar_t |
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dummy[32]; |
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306 |
|
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i->getDistanceStr(dummy, |
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sizeof(dummy) / sizeof(wchar_t)); |
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309 |
|
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auto_ptr<Field> |
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newField(new Field(LDISTANCE_FIELD, |
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dummy, |
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Field::STORE_YES | Field::INDEX_NO)); |
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314 |
|
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i->addField(*newField.get()); |
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316 |
|
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newField.release(); |
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} |
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} |
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320 |
|
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321 |
|
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/** |
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* A functor class that watches out for gps lat / long fields |
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* during cloning (implementation detail of cloneAndGps, see below). |
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*/ |
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class GpsLatLongWatcher |
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327 |
{ |
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328 |
private: |
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float * gpsLat_; |
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float * gpsLong_; |
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|
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332 |
public: |
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GpsLatLongWatcher(float * gpsLat, |
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float * gpsLong) |
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|
335 |
: gpsLat_(gpsLat), |
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|
336 |
gpsLong_(gpsLong) |
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|
337 |
{ |
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|
338 |
*gpsLat_ = invalidGpsCoord; |
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|
339 |
*gpsLong_ = invalidGpsCoord; |
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|
340 |
} |
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|
341 |
|
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|
342 |
|
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|
343 |
void operator()(const wchar_t * name, |
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|
344 |
const wchar_t * value, |
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|
345 |
int /* config */) |
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|
346 |
{ |
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|
347 |
using namespace Cpt; |
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|
348 |
|
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|
349 |
const char |
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|
350 |
* result = NULL; |
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|
351 |
|
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|
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if (wcscmp(name, LLATITUDE_FIELD) == 0) |
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|
353 |
{ |
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|
354 |
result = wconvert(gpsLat_, |
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|
355 |
value); |
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|
356 |
if (result != NULL |
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|
357 |
|| *gpsLat_ < -90.0 |
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|
358 |
|| *gpsLat_ > 90.0) |
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|
359 |
{ |
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|
360 |
*gpsLat_ = invalidGpsCoord; |
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|
361 |
} |
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|
362 |
|
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|
363 |
} |
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364 |
else if (wcscmp(name, LLONGITUDE_FIELD) == 0) |
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|
365 |
{ |
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|
366 |
result = wconvert(gpsLong_, |
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|
367 |
value); |
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|
368 |
if (result != NULL |
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|
369 |
|| *gpsLong_ < -180.0 |
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|
370 |
|| *gpsLong_ > 180.0) |
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|
371 |
{ |
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|
372 |
*gpsLong_ = invalidGpsCoord; |
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|
373 |
} |
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|
374 |
} |
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|
375 |
} |
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|
376 |
}; |
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|
377 |
|
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|
378 |
|
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|
379 |
/** |
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|
380 |
* Clones a clucene document and at the same time retrieves its |
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|
381 |
* LLATITUDE_FIELD and LLONGITUDE_FIELD values as floats. If the |
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|
382 |
* fields don't exist, or cannot be converted or are invalid |
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|
383 |
* coordinates, then a warning is omitted on stdout. |
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|
384 |
* |
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|
385 |
* @param doc the document to clone |
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|
386 |
* |
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|
387 |
* @param gpsLat put the GPS latitude here. If the corresponding |
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|
388 |
* field did not exist, or its conversion to float failed, or it |
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|
389 |
* was out of its sensible domain, it is set to invalidGpsCoord. |
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|
390 |
* |
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|
391 |
* @param gpsLong put the GPS longitude here. If the corresponding |
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|
392 |
* field did not exist, or its conversion to float failed, or it |
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|
393 |
* was out of its sensible domain, it is set to invalidGpsCoord. |
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|
394 |
*/ |
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|
395 |
std::auto_ptr<lucene::document::Document> |
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|
396 |
cloneAndGetGps(lucene::document::Document * doc, |
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|
397 |
float * gpsLat, |
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|
398 |
float * gpsLong) |
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|
399 |
{ |
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|
400 |
return Cpix::CloneWatchingFields(doc, |
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|
401 |
GpsLatLongWatcher(gpsLat, |
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|
402 |
gpsLong)); |
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|
403 |
} |
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|
404 |
|
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|
405 |
|
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|
406 |
/** |
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|
407 |
* Iterates through all hits in the document, and creates a close |
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|
408 |
* lucene document for each as well as creates a corresponding |
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|
409 |
* GpsDistance structure and puts it into the locations vector. |
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|
410 |
*/ |
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|
411 |
void extractLocations(cpix_Hits * unsortedHits, |
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|
412 |
std::vector<GpsDistance> & locations) |
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|
413 |
{ |
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|
414 |
using namespace Cpix; |
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|
415 |
using namespace lucene::document; |
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|
416 |
using namespace std; |
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|
417 |
|
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|
418 |
int32_t |
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|
419 |
count = cpix_Hits_length(unsortedHits); |
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|
420 |
locations.clear(); |
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|
421 |
locations.reserve(count); |
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|
422 |
|
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|
423 |
for (int32_t i = 0; i < count; ++i) |
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|
424 |
{ |
14 | 425 |
cpix_Document* cpixDoc = new cpix_Document; |
0
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|
426 |
|
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changeset
|
427 |
cpix_Hits_doc(unsortedHits, |
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changeset
|
428 |
i, |
14 | 429 |
&cpixDoc, |
430 |
1); |
|
0
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|
431 |
|
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|
432 |
float |
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parents:
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changeset
|
433 |
gpsLat, |
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parents:
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|
434 |
gpsLong; |
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parents:
diff
changeset
|
435 |
|
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Revision: 201011
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parents:
diff
changeset
|
436 |
auto_ptr<lucene::document::Document> |
14 | 437 |
clone(cloneAndGetGps(&Cast2Native<cpix_Document>(cpixDoc)->native(), |
0
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|
438 |
&gpsLat, |
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parents:
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changeset
|
439 |
&gpsLong)); |
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parents:
diff
changeset
|
440 |
GpsDistance |
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parents:
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|
441 |
gdp(clone.get(), |
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parents:
diff
changeset
|
442 |
gpsLat, |
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parents:
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|
443 |
gpsLong); |
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parents:
diff
changeset
|
444 |
|
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Revision: 201011
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parents:
diff
changeset
|
445 |
// GpsDistance instance pointed by gdp took ownership |
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Revision: 201011
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parents:
diff
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|
446 |
// of document pointed by cloce |
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parents:
diff
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|
447 |
clone.release(); |
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448 |
|
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449 |
locations.push_back(gdp); |
14 | 450 |
|
451 |
delete cpixDoc; |
|
0
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452 |
} |
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453 |
} |
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454 |
} |
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455 |
|
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456 |
|
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|
457 |
|
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458 |
namespace Cpix |
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459 |
{ |
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460 |
cpix_Hits * gpsSort(float refPointGpsLat, |
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461 |
float refPointGpsLong, |
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462 |
cpix_Hits * unsortedHits, |
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463 |
cpix_Result * result) |
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|
464 |
{ |
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465 |
using namespace std; |
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466 |
|
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467 |
vector<GpsDistance> |
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468 |
locations; |
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parents:
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|
469 |
|
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470 |
extractLocations(unsortedHits, |
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471 |
locations); |
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|
472 |
|
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473 |
calculateDistances(locations, |
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474 |
refPointGpsLat, |
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475 |
refPointGpsLong); |
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|
476 |
|
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|
477 |
stable_sort(locations.begin(), |
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478 |
locations.end()); |
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|
479 |
|
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|
480 |
auto_ptr<HitDocumentList> |
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Revision: 201011
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|
481 |
sortedHits(new HitDocumentList()); |
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|
482 |
|
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Revision: 201011
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|
483 |
vector<GpsDistance>::iterator |
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Revision: 201011
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|
484 |
i = locations.begin(), |
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485 |
end = locations.end(); |
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|
486 |
|
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|
487 |
for (; i != end; ++i) |
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|
488 |
{ |
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Revision: 201011
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parents:
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|
489 |
sortedHits->add(i->release()); |
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Revision: 201011
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parents:
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|
490 |
} |
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|
491 |
|
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Revision: 201011
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parents:
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|
492 |
cpix_Hits |
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493 |
* rv = NULL; |
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parents:
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|
494 |
|
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Revision: 201011
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parents:
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|
495 |
CreateWrapper(sortedHits.get(), |
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Revision: 201011
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parents:
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|
496 |
result, |
671dee74050a
Revision: 201011
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parents:
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|
497 |
rv); |
671dee74050a
Revision: 201011
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parents:
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|
498 |
|
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Revision: 201011
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parents:
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|
499 |
// regardless of whether the previous call succeeded or |
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Revision: 201011
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parents:
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|
500 |
// failed, the sortedHits auto_ptr loses ownership |
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Revision: 201011
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parents:
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|
501 |
sortedHits.release(); |
671dee74050a
Revision: 201011
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parents:
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|
502 |
|
671dee74050a
Revision: 201011
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parents:
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|
503 |
return rv; |
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Revision: 201011
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parents:
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|
504 |
} |
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Revision: 201011
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parents:
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|
505 |
} |