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

4 files changed, 301 insertions, 0 deletions

diff --git a/src/de/gultsch/chat/xml/Element.java b/src/de/gultsch/chat/xml/Element.java
new file mode 100644
index 000000000..d6d1b23d7
--- /dev/null
+++ b/src/de/gultsch/chat/xml/Element.java
@@ -0,0 +1,65 @@
+package de.gultsch.chat.xml;
+
+import java.util.ArrayList;
+import java.util.Hashtable;
+import java.util.List;
+
+public class Element {
+	protected String name;
+	protected Hashtable<String, String> attributes = new Hashtable<String, String>();
+	protected String content;
+	protected List<Element> children = new ArrayList<Element>();
+	
+	public Element(String name) {
+		this.name = name;
+	}
+	
+	public Element addChild(Element child) {
+		this.content = null;
+		children.add(child);
+		return this;
+	}
+	
+	public Element setContent(String content) {
+		this.content = content;
+		this.children.clear();
+		return this;
+	}
+	
+	public Element setAttribute(String name, String value) {
+		this.attributes.put(name, value);
+		return this;
+	}
+	
+	public Element setAttributes(Hashtable<String, String> attributes) {
+		this.attributes = attributes;
+		return this;
+	}
+	
+	public String toString() {
+		StringBuilder elementOutput = new StringBuilder();
+		if ((content==null)&&(children.size() == 0)) {
+			Tag emptyTag = Tag.empty(name);
+			emptyTag.setAtttributes(this.attributes);
+			elementOutput.append(emptyTag.toString());
+		} else {
+			Tag startTag = Tag.start(name);
+			startTag.setAtttributes(this.attributes);
+			elementOutput.append(startTag);
+			if (content!=null) {
+				elementOutput.append(content);
+			} else {
+				for(Element child : children) {
+					elementOutput.append(child.toString());
+				}
+			}
+			Tag endTag = Tag.end(name);
+			elementOutput.append(endTag);
+		}
+		return elementOutput.toString();
+	}
+
+	public String getName() {
+		return name;
+	}
+}
diff --git a/src/de/gultsch/chat/xml/Tag.java b/src/de/gultsch/chat/xml/Tag.java
new file mode 100644
index 000000000..275229cf4
--- /dev/null
+++ b/src/de/gultsch/chat/xml/Tag.java
@@ -0,0 +1,99 @@
+package de.gultsch.chat.xml;
+
+import java.util.Hashtable;
+import java.util.Iterator;
+import java.util.Map.Entry;
+import java.util.Set;
+
+public class Tag {
+	public static final int NO = -1;
+	public static final int START = 0;
+	public static final int END = 1;
+	public static final int EMPTY = 2;
+	
+	protected int type;
+	protected String name;
+	protected Hashtable<String, String> attributes = new Hashtable<String, String>();
+	
+	protected Tag(int type, String name) {
+		this.type = type;
+		this.name = name;
+	}
+
+
+	public static Tag no(String text) {
+		return new Tag(NO,text);
+	}
+	
+	public static Tag start(String name) {
+		return new Tag(START,name);
+	}
+	
+	public static Tag end(String name) {
+		return new Tag(END,name);
+	}
+	
+	public static Tag empty(String name) {
+		return new Tag(EMPTY,name);
+	}
+	
+	public String getName() {
+		return name;
+	}
+	
+	public String getAttribute(String attrName) {
+		return this.attributes.get(attrName);
+	}
+	
+	public Tag setAttribute(String attrName, String attrValue) {
+		this.attributes.put(attrName, attrValue);
+		return this;
+	}
+	
+	public Tag setAtttributes(Hashtable<String, String> attributes) {
+		this.attributes = attributes;
+		return this;
+	}
+	
+	public boolean isStart(String needle) {
+		return (this.type == START) && (this.name.equals(needle));
+	}
+	
+	public boolean isEnd(String needle) {
+		return (this.type == END) && (this.name.equals(needle));
+	}
+	
+	public boolean isNo() {
+		return (this.type == NO);
+	}
+	
+	public String toString() {
+		StringBuilder tagOutput = new StringBuilder();
+		tagOutput.append('<');
+		if (type==END) {
+			tagOutput.append('/');
+		}
+		tagOutput.append(name);
+		if(type!=END) {
+			Set<Entry<String, String>> attributeSet = attributes.entrySet();
+			Iterator<Entry<String, String>> it = attributeSet.iterator();
+			while(it.hasNext()) {
+				Entry<String,String> entry = it.next();
+				tagOutput.append(' ');
+				tagOutput.append(entry.getKey());
+				tagOutput.append("=\"");
+				tagOutput.append(entry.getValue());
+				tagOutput.append('"');
+			}
+		}
+		if (type==EMPTY) {
+			tagOutput.append('/');
+		}
+		tagOutput.append('>');
+		return tagOutput.toString();
+	}
+
+	public Hashtable<String, String> getAttributes() {
+		return this.attributes;
+	}
+}
diff --git a/src/de/gultsch/chat/xml/TagWriter.java b/src/de/gultsch/chat/xml/TagWriter.java
new file mode 100644
index 000000000..35f27477f
--- /dev/null
+++ b/src/de/gultsch/chat/xml/TagWriter.java
@@ -0,0 +1,46 @@
+package de.gultsch.chat.xml;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.io.OutputStreamWriter;
+
+import android.util.Log;
+
+public class TagWriter {
+	
+	OutputStreamWriter writer;
+	
+	public TagWriter() {
+		
+	}
+	
+	public TagWriter(OutputStream out) {
+		this.setOutputStream(out);
+	}
+	
+	public void setOutputStream(OutputStream out) {
+		this.writer = new OutputStreamWriter(out);
+	}
+	
+	public TagWriter beginDocument() throws IOException {
+		writer.write("<?xml version='1.0'?>");
+		return this;
+	}
+	
+	public TagWriter writeTag(Tag tag) throws IOException {
+		writer.write(tag.toString());
+		return this;
+	}
+	
+	public void flush() throws IOException {
+		writer.flush();
+	}
+
+	public void writeString(String string) throws IOException {
+		writer.write(string);
+	}
+
+	public void writeElement(Element element) throws IOException {
+		writer.write(element.toString());
+	}
+}
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;
+	}
+}