/*
* Copyright 2004 Sun Microsystems, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package com.sun.syndication.io.impl;
import com.sun.syndication.feed.WireFeed;
import com.sun.syndication.feed.rss.Channel;
import com.sun.syndication.feed.rss.Content;
import com.sun.syndication.feed.rss.Description;
import com.sun.syndication.feed.rss.Item;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.Namespace;
import java.util.List;
/**
*/
public class RSS10Parser extends RSS090Parser {
private static final String RSS_URI = "http://purl.org/rss/1.0/";
private static final Namespace RSS_NS = Namespace.getNamespace(RSS_URI);
public RSS10Parser() {
this("rss_1.0", RSS_NS);
}
protected RSS10Parser(String type, Namespace ns) {
super(type, ns);
}
/**
* Indicates if a JDom document is an RSS instance that can be parsed with the parser.
* <p/>
* It checks for RDF ("http://www.w3.org/1999/02/22-rdf-syntax-ns#") and
* RSS ("http://purl.org/rss/1.0/") namespaces being defined in the root element.
*
* @param document document to check if it can be parsed with this parser implementation.
* @return <b>true</b> if the document is RSS1., <b>false</b> otherwise.
*/
public boolean isMyType(Document document) {
boolean ok = false;
Element rssRoot = document.getRootElement();
Namespace defaultNS = rssRoot.getNamespace();
List additionalNSs = rssRoot.getAdditionalNamespaces();
ok = defaultNS!=null && defaultNS.equals(getRDFNamespace());
if (ok) {
if (additionalNSs==null) {
ok = false;
}
else {
ok = false;
for (int i=0;!ok && i<additionalNSs.size();i++) {
ok = getRSSNamespace().equals(additionalNSs.get(i));
}
}
}
return ok;
}
/**
* Returns the namespace used by RSS elements in document of the RSS 1.0
* <P>
*
* @return returns "http://purl.org/rss/1.0/".
*/
protected Namespace getRSSNamespace() {
return Namespace.getNamespace(RSS_URI);
}
/**
* Parses an item element of an RSS document looking for item information.
* <p/>
* It first invokes super.parseItem and then parses and injects the description property if present.
* <p/>
*
* @param rssRoot the root element of the RSS document in case it's needed for context.
* @param eItem the item element to parse.
* @return the parsed RSSItem bean.
*/
protected Item parseItem(Element rssRoot,Element eItem) {
Item item = super.parseItem(rssRoot,eItem);
Element e = eItem.getChild("description", getRSSNamespace());
if (e!=null) {
item.setDescription(parseItemDescription(rssRoot,e));
}
Element ce = eItem.getChild("encoded", getContentNamespace());
if (ce != null) {
Content content = new Content();
content.setType(Content.HTML);
content.setValue(ce.getText());
item.setContent(content);
}
String uri = eItem.getAttributeValue("about", getRDFNamespace());
if (uri != null) {
item.setUri(uri);
}
return item;
}
protected WireFeed parseChannel(Element rssRoot) {
Channel channel = (Channel) super.parseChannel(rssRoot);
Element eChannel = rssRoot.getChild("channel", getRSSNamespace());
String uri = eChannel.getAttributeValue("about", getRDFNamespace());
if (uri != null) {
channel.setUri(uri);
}
return channel;
}
protected Description parseItemDescription(Element rssRoot,Element eDesc) {
Description desc = new Description();
desc.setType("text/plain");
desc.setValue(eDesc.getText());
return desc;
}
}