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
|
package tim.prune.function.filesleuth.extract;
import java.io.InputStream;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
/**
* Responsible for parsing fields out of gpx/kml files
* and passing them back to its receiver
*/
public class XmlParser extends DefaultHandler
{
private final ContentReceiver _receiver;
private String _value = null;
public XmlParser(ContentReceiver inReceiver) {
_receiver = inReceiver;
}
/** @return true if parsing succeeds */
public boolean parseXmlStream(InputStream inStream)
{
// Firstly, try to use xerces to parse the xml (will throw an exception if not available)
try
{
SAXParser saxParser = SAXParserFactory.newInstance("org.apache.xerces.parsers.SAXParser", null).newSAXParser();
saxParser.parse(inStream, this);
return true; // worked
}
catch (Throwable ignored) {} // don't care too much if it didn't work, there's a backup
// If that didn't work, try the built-in classes (which work for xml1.0 but handling for 1.1 contains bugs)
try
{
// Construct a SAXParser and use this as a default handler
SAXParser saxParser = SAXParserFactory.newInstance().newSAXParser();
saxParser.parse(inStream, this);
return true;
}
catch (Exception e) {
return false;
}
}
@Override
public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException
{
String tag = qName.toLowerCase();
if (isTextTag(tag) || isTimeTag(tag)) {
_value = "";
}
else if (isPointTag(tag))
{
String latitudeString = attributes.getValue("lat");
String longitudeString = attributes.getValue("lon");
addCoordinates(latitudeString, longitudeString);
}
super.startElement(uri, localName, qName, attributes);
}
private void addCoordinates(String inLatitude, String inLongitude)
{
try
{
double lat = Double.parseDouble(inLatitude);
double lon = Double.parseDouble(inLongitude);
_receiver.addCoordinates(lat, lon);
}
catch (Exception ignored) {}
}
@Override
public void characters(char[] ch, int start, int length) throws SAXException
{
if (_value != null) {
_value += new String(ch, start, length);
}
super.characters(ch, start, length);
}
@Override
public void endElement(String uri, String localName, String qName) throws SAXException
{
if (_value != null)
{
String tag = qName.toLowerCase();
if (isTextTag(tag))
{
_receiver.addString(_value);
if ("name".equals(tag)) {
_receiver.setName(_value);
}
else if ("desc".equals(tag)) {
_receiver.setDescription(_value);
}
}
else if (isTimeTag(tag)) {
_receiver.addDateString(_value);
}
_value = null;
}
super.endElement(uri, localName, qName);
}
private boolean isTextTag(String inTag) {
return "name".equals(inTag) || "desc".equals(inTag);
}
private boolean isTimeTag(String inTag) {
return "when".equals(inTag) || "time".equals(inTag);
}
private boolean isPointTag(String inTag) {
return "wpt".equals(inTag) || "trkpt".equals(inTag) || "rtept".equals(inTag);
}
@Override
public void endDocument() throws SAXException
{
super.endDocument();
_receiver.endDocument();
}
}
|
