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 InputStream getInputStream() {
41 return is;
42 }
43
44 public void reset() {
45 try {
46 parser.setInput(new InputStreamReader(this.is));
47 } catch (XmlPullParserException e) {
48 Log.d(LOGTAG,"error resetting input stream");
49 }
50 }
51
52 public Tag readTag() throws XmlPullParserException, IOException {
53 if (wakeLock.isHeld()) {
54 wakeLock.release(); //release wake look while waiting on next parser event
55 }
56 while(parser.next() != XmlPullParser.END_DOCUMENT) {
57 wakeLock.acquire();
58 if (parser.getEventType() == XmlPullParser.START_TAG) {
59 Tag tag = Tag.start(parser.getName());
60 for(int i = 0; i < parser.getAttributeCount(); ++i) {
61 tag.setAttribute(parser.getAttributeName(i), parser.getAttributeValue(i));
62 }
63 String xmlns = parser.getNamespace();
64 if (xmlns!=null) {
65 tag.setAttribute("xmlns",xmlns);
66 }
67 return tag;
68 } else if (parser.getEventType() == XmlPullParser.END_TAG) {
69 Tag tag = Tag.end(parser.getName());
70 return tag;
71 } else if (parser.getEventType() == XmlPullParser.TEXT) {
72 Tag tag = Tag.no(parser.getText());
73 return tag;
74 }
75 }
76 if (wakeLock.isHeld()) {
77 wakeLock.release();
78 }
79 return null; //end document;
80 }
81
82 public Element readElement(Tag currentTag) throws XmlPullParserException, IOException {
83 Element element = new Element(currentTag.getName());
84 //Log.d(LOGTAG,"trying to read element "+element.getName());
85 element.setAttributes(currentTag.getAttributes());
86 Tag nextTag = this.readTag();
87 //Log.d(LOGTAG,"next Tag is: "+nextTag.toString());
88 if(nextTag.isNo()) {
89 element.setContent(nextTag.getName());
90 nextTag = this.readTag();
91 }
92 if (nextTag == null) {
93 throw new IOException("unterupted mid tag");
94 }
95 //Log.d(LOGTAG,"reading till the end of "+element.getName());
96 while(!nextTag.isEnd(element.getName())) {
97 if (!nextTag.isNo()) {
98 Element child = this.readElement(nextTag);
99 element.addChild(child);
100 }
101 nextTag = this.readTag();
102 }
103 //Log.d(LOGTAG,"return with element"+element);
104 return element;
105 }
106}