1package eu.siacs.conversations.xml;
2
3import java.io.IOException;
4import java.io.InputStream;
5import java.io.InputStreamReader;
6
7import org.xmlpull.v1.XmlPullParser;
8import org.xmlpull.v1.XmlPullParserException;
9
10import android.os.PowerManager;
11import android.os.PowerManager.WakeLock;
12import android.util.Log;
13import android.util.Xml;
14
15public class XmlReader {
16 private static final String LOGTAG = "xmppService";
17 private XmlPullParser parser;
18 private PowerManager.WakeLock wakeLock;
19 private InputStream is;
20
21 public XmlReader(WakeLock wakeLock) {
22 this.parser = Xml.newPullParser();
23 try {
24 this.parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES,true);
25 } catch (XmlPullParserException e) {
26 Log.d(LOGTAG,"error setting namespace feature on parser");
27 }
28 this.wakeLock = wakeLock;
29 }
30
31 public void setInputStream(InputStream inputStream) {
32 this.is = inputStream;
33 try {
34 parser.setInput(new InputStreamReader(this.is));
35 } catch (XmlPullParserException e) {
36 Log.d(LOGTAG,"error setting input stream");
37 }
38 }
39
40 public void reset() {
41 try {
42 parser.setInput(new InputStreamReader(this.is));
43 } catch (XmlPullParserException e) {
44 Log.d(LOGTAG,"error resetting input stream");
45 }
46 }
47
48 public Tag readTag() throws XmlPullParserException, IOException {
49 if (wakeLock.isHeld()) {
50 wakeLock.release(); //release wake look while waiting on next parser event
51 }
52 while(parser.next() != XmlPullParser.END_DOCUMENT) {
53 wakeLock.acquire();
54 if (parser.getEventType() == XmlPullParser.START_TAG) {
55 Tag tag = Tag.start(parser.getName());
56 for(int i = 0; i < parser.getAttributeCount(); ++i) {
57 tag.setAttribute(parser.getAttributeName(i), parser.getAttributeValue(i));
58 }
59 String xmlns = parser.getNamespace();
60 if (xmlns!=null) {
61 tag.setAttribute("xmlns",xmlns);
62 }
63 return tag;
64 } else if (parser.getEventType() == XmlPullParser.END_TAG) {
65 Tag tag = Tag.end(parser.getName());
66 return tag;
67 } else if (parser.getEventType() == XmlPullParser.TEXT) {
68 Tag tag = Tag.no(parser.getText());
69 return tag;
70 }
71 }
72 if (wakeLock.isHeld()) {
73 wakeLock.release();
74 }
75 return null; //end document;
76 }
77
78 public Element readElement(Tag currentTag) throws XmlPullParserException, IOException {
79 Element element = new Element(currentTag.getName());
80 //Log.d(LOGTAG,"trying to read element "+element.getName());
81 element.setAttributes(currentTag.getAttributes());
82 Tag nextTag = this.readTag();
83 //Log.d(LOGTAG,"next Tag is: "+nextTag.toString());
84 if(nextTag.isNo()) {
85 element.setContent(nextTag.getName());
86 nextTag = this.readTag();
87 }
88 if (nextTag == null) {
89 throw new IOException("unterupted mid tag");
90 }
91 //Log.d(LOGTAG,"reading till the end of "+element.getName());
92 while(!nextTag.isEnd(element.getName())) {
93 if (!nextTag.isNo()) {
94 Element child = this.readElement(nextTag);
95 element.addChild(child);
96 }
97 nextTag = this.readTag();
98 }
99 //Log.d(LOGTAG,"return with element"+element);
100 return element;
101 }
102}