first draft on xml parser and communication. a long way to go. code definitly not perfect. will refactor asap

1 files changed, 91 insertions, 0 deletions

diff --git a/src/de/gultsch/chat/xml/XmlReader.java b/src/de/gultsch/chat/xml/XmlReader.java
new file mode 100644
index 000000000..e086c8ae2
--- /dev/null
+++ b/src/de/gultsch/chat/xml/XmlReader.java
@@ -0,0 +1,91 @@
+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
+		}
+		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());
+		element.setAttributes(currentTag.getAttributes());
+		Tag nextTag = this.readTag();
+		if(nextTag.isNo()) {
+			element.setContent(nextTag.getName());
+			nextTag = this.readTag();
+		}
+		while(!nextTag.isEnd(element.getName())) {
+			Element child = this.readElement(nextTag);
+			element.addChild(child);
+			nextTag = this.readTag();
+		}
+		return element;
+	}
+}