1 files changed, 141 insertions, 0 deletions
diff --git a/src/main/java/eu/siacs/conversations/xml/XmlReader.java b/src/main/java/eu/siacs/conversations/xml/XmlReader.java
new file mode 100644
index 00000000..52d3d46a
--- /dev/null
+++ b/src/main/java/eu/siacs/conversations/xml/XmlReader.java
@@ -0,0 +1,141 @@
+package eu.siacs.conversations.xml;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+
+import org.xmlpull.v1.XmlPullParser;
+import org.xmlpull.v1.XmlPullParserException;
+
+import eu.siacs.conversations.Config;
+
+import android.os.PowerManager;
+import android.os.PowerManager.WakeLock;
+import android.util.Log;
+import android.util.Xml;
+
+public class XmlReader {
+	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(Config.LOGTAG, "error setting namespace feature on parser");
+		}
+		this.wakeLock = wakeLock;
+	}
+
+	public void setInputStream(InputStream inputStream) throws IOException {
+		if (inputStream == null) {
+			throw new IOException();
+		}
+		this.is = inputStream;
+		try {
+			parser.setInput(new InputStreamReader(this.is));
+		} catch (XmlPullParserException e) {
+			throw new IOException("error resetting parser");
+		}
+	}
+
+	public InputStream getInputStream() throws IOException {
+		if (this.is == null) {
+			throw new IOException();
+		}
+		return is;
+	}
+
+	public void reset() throws IOException {
+		if (this.is == null) {
+			throw new IOException();
+		}
+		try {
+			parser.setInput(new InputStreamReader(this.is));
+		} catch (XmlPullParserException e) {
+			throw new IOException("error resetting parser");
+		}
+	}
+
+	public Tag readTag() throws XmlPullParserException, IOException {
+		if (wakeLock.isHeld()) {
+			try {
+				wakeLock.release();
+			} catch (RuntimeException re) {
+			}
+		}
+		try {
+			while (this.is != null
+					&& parser.next() != XmlPullParser.END_DOCUMENT) {
+				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));
+					}
+					String xmlns = parser.getNamespace();
+					if (xmlns != null) {
+						tag.setAttribute("xmlns", xmlns);
+					}
+					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()) {
+				try {
+					wakeLock.release();
+				} catch (RuntimeException re) {
+				}
+			}
+		} catch (ArrayIndexOutOfBoundsException e) {
+			throw new IOException(
+					"xml parser mishandled ArrayIndexOufOfBounds", e);
+		} catch (StringIndexOutOfBoundsException e) {
+			throw new IOException(
+					"xml parser mishandled StringIndexOufOfBounds", e);
+		} catch (NullPointerException e) {
+			throw new IOException("xml parser mishandled NullPointerException",
+					e);
+		} catch (IndexOutOfBoundsException e) {
+			throw new IOException("xml parser mishandled IndexOutOfBound", e);
+		}
+		return null;
+	}
+
+	public Element readElement(Tag currentTag) throws XmlPullParserException,
+			IOException {
+		Element element = new Element(currentTag.getName());
+		element.setAttributes(currentTag.getAttributes());
+		Tag nextTag = this.readTag();
+		if (nextTag == null) {
+			throw new IOException("unterupted mid tag");
+		}
+		if (nextTag.isNo()) {
+			element.setContent(nextTag.getName());
+			nextTag = this.readTag();
+			if (nextTag == null) {
+				throw new IOException("unterupted mid tag");
+			}
+		}
+		while (!nextTag.isEnd(element.getName())) {
+			if (!nextTag.isNo()) {
+				Element child = this.readElement(nextTag);
+				element.addChild(child);
+			}
+			nextTag = this.readTag();
+			if (nextTag == null) {
+				throw new IOException("unterupted mid tag");
+			}
+		}
+		return element;
+	}
+}