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@ -7,12 +7,12 @@
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program in the file lgpl21.txt
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* If not, see <http://www.gnu.org/licenses/>.
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@ -33,32 +33,31 @@ import org.xml.sax.Attributes;
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import org.xml.sax.EntityResolver;
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import org.xml.sax.InputSource;
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import org.xml.sax.SAXException;
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import org.xml.sax.XMLReader;
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import org.xml.sax.helpers.DefaultHandler;
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public class RSSReader extends DefaultHandler {
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// class variables
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private RSSMessage item;
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private final StringBuilder buffer;
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private boolean parsingChannel, parsingImage, parsingItem;
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private final RSSFeed theChannel;
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private Type type;
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public enum Type { rss, atom, rdf, none };
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private RSSReader(int maxsize) {
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theChannel = new RSSFeed(maxsize);
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buffer = new StringBuilder(300);
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item = null;
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parsingChannel = false;
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parsingImage = false;
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parsingItem = false;
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type = Type.none;
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private RSSReader(final int maxsize) {
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this.theChannel = new RSSFeed(maxsize);
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this.buffer = new StringBuilder(300);
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this.item = null;
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this.parsingChannel = false;
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this.parsingImage = false;
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this.parsingItem = false;
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this.type = Type.none;
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}
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public RSSReader(int maxsize, final InputStream stream, Type type) throws IOException {
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public RSSReader(final int maxsize, final InputStream stream, final Type type) throws IOException {
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this(maxsize);
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this.type = type;
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final SAXParserFactory factory = SAXParserFactory.newInstance();
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@ -73,18 +72,18 @@ public class RSSReader extends DefaultHandler {
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}
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});
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saxParser.parse(stream, this);
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} catch (SAXException e) {
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} catch (final SAXException e) {
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throw new IOException (e.getMessage());
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} catch (ParserConfigurationException e) {
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} catch (final ParserConfigurationException e) {
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throw new IOException (e.getMessage());
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}
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}
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public Type getType() {
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return this.type;
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}
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public static RSSReader parse(int maxsize, final byte[] a) throws IOException {
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public static RSSReader parse(final int maxsize, final byte[] a) throws IOException {
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// check integrity of array
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if ((a == null) || (a.length == 0)) {
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@ -96,15 +95,15 @@ public class RSSReader extends DefaultHandler {
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if (!equals(a, UTF8.getBytes("<?xml")) && !equals(a, UTF8.getBytes("<rss"))) {
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throw new IOException("response does not contain valid xml");
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}
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final Type type = findOutType(a);
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if (type == Type.none) {
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throw new IOException("response incomplete");
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}
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// make input stream
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final ByteArrayInputStream bais = new ByteArrayInputStream(a);
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// parse stream
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RSSReader reader = null;
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try {
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@ -156,25 +155,25 @@ public class RSSReader extends DefaultHandler {
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public void startElement(final String uri, final String name, final String tag, final Attributes atts) throws SAXException {
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if ("channel".equals(tag)) {
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this.type = Type.rss;
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item = new RSSMessage();
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parsingChannel = true;
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this.item = new RSSMessage();
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this.parsingChannel = true;
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} else if ("feed".equals(tag)) {
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this.type = Type.atom;
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item = new RSSMessage();
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parsingChannel = true;
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this.item = new RSSMessage();
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this.parsingChannel = true;
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} else if ("item".equals(tag) || "entry".equals(tag)) {
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if (parsingChannel) {
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if (this.parsingChannel) {
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// the channel ends with the first item not with the channel close tag
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theChannel.setChannel(item);
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parsingChannel = false;
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this.theChannel.setChannel(this.item);
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this.parsingChannel = false;
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}
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item = new RSSMessage();
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parsingItem = true;
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} else if (parsingItem && this.type == Type.atom && "link".equals(tag)) {
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String url = atts.getValue("href");
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if (url != null && url.length() > 0) item.setValue("link", url);
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this.item = new RSSMessage();
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this.parsingItem = true;
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} else if (this.parsingItem && this.type == Type.atom && "link".equals(tag)) {
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final String url = atts.getValue("href");
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if (url != null && url.length() > 0) this.item.setValue("link", url);
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} else if ("image".equals(tag)) {
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parsingImage = true;
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this.parsingImage = true;
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}
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}
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@ -182,37 +181,37 @@ public class RSSReader extends DefaultHandler {
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public void endElement(final String uri, final String name, final String tag) {
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if (tag == null) return;
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if ("channel".equals(tag) || "feed".equals(tag)) {
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if (parsingChannel) theChannel.setChannel(item);
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parsingChannel = false;
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if (this.parsingChannel) this.theChannel.setChannel(this.item);
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this.parsingChannel = false;
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} else if ("item".equals(tag) || "entry".equals(tag)) {
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theChannel.addMessage(item);
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parsingItem = false;
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this.theChannel.addMessage(this.item);
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this.parsingItem = false;
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} else if ("image".equals(tag)) {
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parsingImage = false;
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} else if ((parsingImage) && (parsingChannel)) {
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final String value = buffer.toString().trim();
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buffer.setLength(0);
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if ("url".equals(tag)) theChannel.setImage(value);
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} else if (parsingItem) {
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final String value = buffer.toString().trim();
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buffer.setLength(0);
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if (RSSMessage.tags.contains(tag) && value.length() > 0) item.setValue(tag, value);
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} else if (parsingChannel) {
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final String value = buffer.toString().trim();
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buffer.setLength(0);
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if (RSSMessage.tags.contains(tag)) item.setValue(tag, value);
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this.parsingImage = false;
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} else if ((this.parsingImage) && (this.parsingChannel)) {
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final String value = this.buffer.toString().trim();
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this.buffer.setLength(0);
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if ("url".equals(tag)) this.theChannel.setImage(value);
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} else if (this.parsingItem) {
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final String value = this.buffer.toString().trim();
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this.buffer.setLength(0);
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if (RSSMessage.tags.contains(tag) && value.length() > 0) this.item.setValue(tag, value);
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} else if (this.parsingChannel) {
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final String value = this.buffer.toString().trim();
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this.buffer.setLength(0);
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if (RSSMessage.tags.contains(tag)) this.item.setValue(tag, value);
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}
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}
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@Override
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public void characters(final char ch[], final int start, final int length) {
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if (parsingItem || parsingChannel) {
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buffer.append(ch, start, length);
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if (this.parsingItem || this.parsingChannel) {
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this.buffer.append(ch, start, length);
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}
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}
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public RSSFeed getFeed() {
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return theChannel;
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return this.theChannel;
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}
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}
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orbiter
14 years ago