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package de.podfetcher.syndication.handler;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
import android.util.Log;
import de.podfetcher.feed.Feed;
import de.podfetcher.syndication.namespace.Namespace;
import de.podfetcher.syndication.namespace.SyndElement;
import de.podfetcher.syndication.namespace.atom.NSAtom;
import de.podfetcher.syndication.namespace.rss20.NSRSS20;
/** Superclass for all SAX Handlers which process Syndication formats */
public class SyndHandler extends DefaultHandler {
private static final String TAG = "SyndHandler";
private static final String DEFAULT_PREFIX = "";
protected HandlerState state;
public SyndHandler(Feed feed, TypeGetter.Type type) {
state = new HandlerState(feed);
if (type == TypeGetter.Type.RSS20) {
state.defaultNamespaces.push(new NSRSS20());
}
}
@Override
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException {
if (localName.equals("image") || qName.equals("image")) {
Log.d(TAG, "Found image");
}
Namespace handler = getHandlingNamespace(uri);
if (handler != null) {
SyndElement element = handler.handleElementStart(localName, state,
attributes);
state.tagstack.push(element);
}
}
@Override
public void characters(char[] ch, int start, int length)
throws SAXException {
if (!state.tagstack.empty()) {
SyndElement top = state.tagstack.peek();
if (top.getNamespace() != null) {
top.getNamespace().handleCharacters(state, ch, start, length);
}
}
}
@Override
public void endElement(String uri, String localName, String qName)
throws SAXException {
Namespace handler = getHandlingNamespace(uri);
if (handler != null) {
handler.handleElementEnd(localName, state);
state.tagstack.pop();
}
}
@Override
public void endPrefixMapping(String prefix) throws SAXException {
// TODO remove Namespace
}
@Override
public void startPrefixMapping(String prefix, String uri)
throws SAXException {
// Find the right namespace
if (uri.equals(NSAtom.NSURI)) {
if (prefix.equals(DEFAULT_PREFIX)) {
state.defaultNamespaces.push(new NSAtom());
} else if (prefix.equals(NSAtom.NSTAG)) {
state.namespaces.put(uri, new NSAtom());
}
}
}
private Namespace getHandlingNamespace(String uri) {
Namespace handler = state.namespaces.get(uri);
if (handler == null && uri.equals(DEFAULT_PREFIX) &&!state.defaultNamespaces.empty()) {
handler = state.defaultNamespaces.peek();
}
return handler;
}
public HandlerState getState() {
return state;
}
}
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