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 try { wakeLock.release();} catch (RuntimeException re) {}
55 }
56 try {
57 while(parser.next() != XmlPullParser.END_DOCUMENT) {
58 wakeLock.acquire();
59 if (parser.getEventType() == XmlPullParser.START_TAG) {
60 Tag tag = Tag.start(parser.getName());
61 for(int i = 0; i < parser.getAttributeCount(); ++i) {
62 tag.setAttribute(parser.getAttributeName(i), parser.getAttributeValue(i));
63 }
64 String xmlns = parser.getNamespace();
65 if (xmlns!=null) {
66 tag.setAttribute("xmlns",xmlns);
67 }
68 return tag;
69 } else if (parser.getEventType() == XmlPullParser.END_TAG) {
70 Tag tag = Tag.end(parser.getName());
71 return tag;
72 } else if (parser.getEventType() == XmlPullParser.TEXT) {
73 Tag tag = Tag.no(parser.getText());
74 return tag;
75 }
76 }
77 if (wakeLock.isHeld()) {
78 try { wakeLock.release();} catch (RuntimeException re) {}
79 }
80 } catch (ArrayIndexOutOfBoundsException e) {
81 throw new IOException("xml parser mishandled ArrayIndexOufOfBounds", e);
82 }
83 return null;
84 }
85
86 public Element readElement(Tag currentTag) throws XmlPullParserException, IOException {
87 Element element = new Element(currentTag.getName());
88 element.setAttributes(currentTag.getAttributes());
89 Tag nextTag = this.readTag();
90 if(nextTag.isNo()) {
91 element.setContent(nextTag.getName());
92 nextTag = this.readTag();
93 }
94 if (nextTag == null) {
95 throw new IOException("unterupted mid tag");
96 }
97 while(!nextTag.isEnd(element.getName())) {
98 if (!nextTag.isNo()) {
99 Element child = this.readElement(nextTag);
100 element.addChild(child);
101 }
102 nextTag = this.readTag();
103 if (nextTag == null) {
104 throw new IOException("unterupted mid tag");
105 }
106 }
107 return element;
108 }
109}