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
|
// Copyright 2008, Google Inc. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// 3. Neither the name of Google Inc. nor the names of its contributors may be
// used to endorse or promote products derived from this software without
// specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// This sample program uses a ParserObserver which counts element usage
// in the given KML or KMZ file.
#include <iostream>
#include <map>
#include <string>
#include "boost/scoped_ptr.hpp"
#include "kml/dom.h"
#include "kml/dom/xsd.h" // TODO: consider the Xsd class public?
#include "kml/engine.h"
#include "kml/base/file.h"
using kmlengine::KmzFile;
using std::cout;
using std::endl;
// This map is used to hold the occurrence count for each element.
typedef std::map<kmldom::KmlDomType, int> element_count_map_t;
// This ParserObserver uses the NewElement() method to count the number of
// ocurrences of each type of element.
class ElementCounter : public kmldom::ParserObserver {
public:
// ParserObserver::NewElement()
virtual bool NewElement(const kmldom::ElementPtr& element) {
if (element_count_map_.find(element->Type()) == element_count_map_.end()) {
element_count_map_[element->Type()] = 1;
} else {
element_count_map_[element->Type()] += 1;
}
return true; // Always return true to keep parsing.
}
// This method prints a summary of the internal element counting map.
void PrintElementCounts() const {
int total_element_count = 0;
element_count_map_t::const_iterator map_iter;
for (map_iter = element_count_map_.begin();
map_iter != element_count_map_.end();
++map_iter) {
cout << kmldom::Xsd::GetSchema()->ElementName((*map_iter).first)
<< " " << (*map_iter).second << endl;
total_element_count += (*map_iter).second;
}
cout << "Element types " << element_count_map_.size() << endl;
cout << "Total elements " << total_element_count << endl;
}
private:
element_count_map_t element_count_map_;
};
int main(int argc, char** argv) {
if (argc != 2) {
cout << "usage: " << argv[0] << " kmlfile" << endl;
return 1;
}
// Read the file.
std::string file_data;
if (!kmlbase::File::ReadFileToString(argv[1], &file_data)) {
cout << argv[1] << " read failed" << endl;
return 1;
}
// If the file was KMZ, extract the KML file.
std::string kml;
if (KmzFile::IsKmz(file_data)) {
boost::scoped_ptr<KmzFile> kmz_file(KmzFile::OpenFromString(file_data));
if (!kmz_file.get()) {
cout << "Failed opening KMZ file" << endl;
return 1;
}
if (!kmz_file->ReadKml(&kml)) {
cout << "Failed to read KML from KMZ" << endl;
return 1;
}
} else {
kml = file_data;
}
// Parse it with the ElementCounter installed as a ParseObserver.
kmldom::Parser parser;
ElementCounter element_counter;
parser.AddObserver(&element_counter);
std::string errors;
kmldom::ElementPtr root = parser.Parse(kml, &errors);
if (!root) {
cout << errors << endl;
return 1;
}
// Ask the ElementCounter to print out what it observed.
element_counter.PrintElementCounts();
return 0;
}
|
