SaxFeedParser.java

/*
 * PinDroid - http://code.google.com/p/PinDroid/
 *
 * Copyright (C) 2010 Matt Schmidt
 *
 * PinDroid is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation; either version 3 of the License,
 * or (at your option) any later version.
 *
 * PinDroid is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with PinDroid; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 */

package com.pindroid.xml;

import java.io.InputStream;
import java.text.ParseException;

import android.database.Cursor;
import android.database.MatrixCursor;
import android.sax.Element;
import android.sax.EndElementListener;
import android.sax.EndTextElementListener;
import android.sax.RootElement;
import android.util.Xml;

import com.pindroid.providers.BookmarkContent.Bookmark;
import com.pindroid.util.DateParser;

public class SaxFeedParser {

	private InputStream is;
	static final String nsRdf = "http://www.w3.org/1999/02/22-rdf-syntax-ns#";
	static final String nsDc = "http://purl.org/dc/elements/1.1/";
	static final String ns = "http://purl.org/rss/1.0/";
	
    public SaxFeedParser(InputStream stream) {
    	is = stream;
    }

    public Cursor parse() throws ParseException {
        final Bookmark currentBookmark = new Bookmark();
        final RootElement root = new RootElement(nsRdf, "RDF");
        final Element item = root.getChild(ns, "item");
        final MatrixCursor bookmarks = new MatrixCursor(new String[] {Bookmark._ID, Bookmark.Url, 
        		Bookmark.Description, Bookmark.Meta, Bookmark.Tags, Bookmark.ToRead, Bookmark.Shared,
        		Bookmark.Notes, Bookmark.Time, Bookmark.Account, Bookmark.Hash});
        
        item.setEndElementListener(new EndElementListener(){
            public void end() {
            	if(currentBookmark.getDescription() == null || currentBookmark.getDescription().equals(""))
            		currentBookmark.setDescription(currentBookmark.getUrl());
            	
                bookmarks.addRow(new Object[]{0, currentBookmark.getUrl(), currentBookmark.getDescription(),
                		currentBookmark.getMeta(), currentBookmark.getTagString(), currentBookmark.getToRead() ? 1 : 0,
                		currentBookmark.getShared() ? 1 : 0, currentBookmark.getNotes(),
                		currentBookmark.getTime(), currentBookmark.getAccount(), null});
                currentBookmark.clear();
            }
        });
        item.getChild(ns, "title").setEndTextElementListener(new EndTextElementListener(){
            public void end(String body) {
            	currentBookmark.setDescription(body);
            }
        });
        item.getChild(nsDc, "date").setEndTextElementListener(new EndTextElementListener(){
            public void end(String body) {
				currentBookmark.setTime(DateParser.parseTime(body.trim()));
            }
        });
        item.getChild(ns, "link").setEndTextElementListener(new EndTextElementListener(){
            public void end(String body) {
            	currentBookmark.setUrl(body);
            }
        });
        item.getChild(nsDc, "creator").setEndTextElementListener(new EndTextElementListener(){
            public void end(String body) {
            	currentBookmark.setAccount(body);
            }
        });
        item.getChild(ns, "description").setEndTextElementListener(new EndTextElementListener(){
            public void end(String body) {
            	currentBookmark.setNotes(body.trim());
            }
        });
        item.getChild(nsDc, "subject").setEndTextElementListener(new EndTextElementListener(){
            public void end(String body) {
            	currentBookmark.setTagString(body.trim());
            }
        });

        try {
            Xml.parse(is, Xml.Encoding.UTF_8, root.getContentHandler());
        } catch (Exception e) {
            throw new ParseException(e.getMessage(), 0);
        }
        return bookmarks;
    }
}