1package de.gultsch.chat.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 //Log.d(LOGTAG,"there was a wake lock. releasing it till next event");
51 wakeLock.release(); //release wake look while waiting on next parser event
52 }
53 //Log.d(LOGTAG,"waiting for new event...");
54 while(parser.next() != XmlPullParser.END_DOCUMENT) {
55 //Log.d(LOGTAG,"found new event. acquiring wake lock");
56 wakeLock.acquire();
57 if (parser.getEventType() == XmlPullParser.START_TAG) {
58 Tag tag = Tag.start(parser.getName());
59 for(int i = 0; i < parser.getAttributeCount(); ++i) {
60 tag.setAttribute(parser.getAttributeName(i), parser.getAttributeValue(i));
61 }
62 return tag;
63 } else if (parser.getEventType() == XmlPullParser.END_TAG) {
64 Tag tag = Tag.end(parser.getName());
65 return tag;
66 } else if (parser.getEventType() == XmlPullParser.TEXT) {
67 Tag tag = Tag.no(parser.getText());
68 return tag;
69 }
70 }
71 if (wakeLock.isHeld()) {
72 wakeLock.release();
73 }
74 return null; //end document;
75 }
76
77 public Element readElement(Tag currentTag) throws XmlPullParserException, IOException {
78 Element element = new Element(currentTag.getName());
79 //Log.d(LOGTAG,"trying to read element "+element.getName());
80 element.setAttributes(currentTag.getAttributes());
81 Tag nextTag = this.readTag();
82 //Log.d(LOGTAG,"next Tag is: "+nextTag.toString());
83 if(nextTag.isNo()) {
84 element.setContent(nextTag.getName());
85 nextTag = this.readTag();
86 }
87 //Log.d(LOGTAG,"reading till the end of "+element.getName());
88 while(!nextTag.isEnd(element.getName())) {
89 if (!nextTag.isNo()) {
90 Element child = this.readElement(nextTag);
91 element.addChild(child);
92 }
93 nextTag = this.readTag();
94 }
95 //Log.d(LOGTAG,"return with element"+element);
96 return element;
97 }
98}