fix for feeds that do not declare the rss namespace at the root element, only the rdf one (#140)

src/main/java/com/commafeed/backend/rome/RSSRDF10Parser.java

@@ -0,0 +1,51 @@
+package com.commafeed.backend.rome;
+
+import java.util.List;
+
+import org.apache.commons.collections.CollectionUtils;
+import org.jdom.Document;
+import org.jdom.Element;
+import org.jdom.Namespace;
+
+import com.google.common.collect.Lists;
+import com.sun.syndication.io.impl.RSS10Parser;
+
+public class RSSRDF10Parser extends RSS10Parser {
+
+	private static final String RSS_URI = "http://purl.org/rss/1.0/";
+	private static final Namespace RSS_NS = Namespace.getNamespace(RSS_URI);
+
+	public RSSRDF10Parser() {
+		super("rss_1.0", RSS_NS);
+	}
+
+	@SuppressWarnings({ "rawtypes", "unchecked" })
+	@Override
+	public boolean isMyType(Document document) {
+		boolean ok = false;
+
+		Element rssRoot = document.getRootElement();
+		Namespace defaultNS = rssRoot.getNamespace();
+		List additionalNSs = Lists.newArrayList(rssRoot
+				.getAdditionalNamespaces());
+		List<Element> children = rssRoot.getChildren();
+		if (CollectionUtils.isNotEmpty(children)) {
+			Element child = children.get(0);
+			additionalNSs.add(child.getNamespace());
+			additionalNSs.addAll(child.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;
+	}
+}