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package de.gultsch.chat.xml;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import android.os.PowerManager;
import android.os.PowerManager.WakeLock;
import android.util.Log;
import android.util.Xml;
public class XmlReader {
private static final String LOGTAG = "xmppService";
private XmlPullParser parser;
private PowerManager.WakeLock wakeLock;
private InputStream is;
public XmlReader(WakeLock wakeLock) {
this.parser = Xml.newPullParser();
try {
this.parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES,true);
} catch (XmlPullParserException e) {
Log.d(LOGTAG,"error setting namespace feature on parser");
}
this.wakeLock = wakeLock;
}
public void setInputStream(InputStream inputStream) {
this.is = inputStream;
try {
parser.setInput(new InputStreamReader(this.is));
} catch (XmlPullParserException e) {
Log.d(LOGTAG,"error setting input stream");
}
}
public void reset() {
try {
parser.setInput(new InputStreamReader(this.is));
} catch (XmlPullParserException e) {
Log.d(LOGTAG,"error resetting input stream");
}
}
public Tag readTag() throws XmlPullParserException, IOException {
if (wakeLock.isHeld()) {
//Log.d(LOGTAG,"there was a wake lock. releasing it till next event");
wakeLock.release(); //release wake look while waiting on next parser event
}
//Log.d(LOGTAG,"waiting for new event...");
while(parser.next() != XmlPullParser.END_DOCUMENT) {
//Log.d(LOGTAG,"found new event. acquiring wake lock");
wakeLock.acquire();
if (parser.getEventType() == XmlPullParser.START_TAG) {
Tag tag = Tag.start(parser.getName());
for(int i = 0; i < parser.getAttributeCount(); ++i) {
tag.setAttribute(parser.getAttributeName(i), parser.getAttributeValue(i));
}
return tag;
} else if (parser.getEventType() == XmlPullParser.END_TAG) {
Tag tag = Tag.end(parser.getName());
return tag;
} else if (parser.getEventType() == XmlPullParser.TEXT) {
Tag tag = Tag.no(parser.getText());
return tag;
}
}
if (wakeLock.isHeld()) {
wakeLock.release();
}
return null; //end document;
}
public Element readElement(Tag currentTag) throws XmlPullParserException, IOException {
Element element = new Element(currentTag.getName());
//Log.d(LOGTAG,"trying to read element "+element.getName());
element.setAttributes(currentTag.getAttributes());
Tag nextTag = this.readTag();
//Log.d(LOGTAG,"next Tag is: "+nextTag.toString());
if(nextTag.isNo()) {
element.setContent(nextTag.getName());
nextTag = this.readTag();
}
//Log.d(LOGTAG,"reading till the end of "+element.getName());
while(!nextTag.isEnd(element.getName())) {
if (!nextTag.isNo()) {
Element child = this.readElement(nextTag);
element.addChild(child);
}
nextTag = this.readTag();
}
//Log.d(LOGTAG,"return with element"+element);
return element;
}
}
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