added option to clean the triplestore when deleting the index

htroot/IndexControlRWIs_p.html

@@ -41,11 +41,12 @@
       <dl>
         <dt class="TableCellDark">Index Deletion</dt>
         <dd><input type="checkbox" name="deleteIndex" id="deleteIndex"
-             onclick="x=document.getElementById('deleteIndex').checked;document.getElementById('deleteRobots').checked=x;document.getElementById('deleteCrawlQueues').checked=x;c='disabled';document.getElementById('deleteSearchFl').checked=x;if(x){c='';}document.getElementById('deletecomplete').disabled=c;document.getElementById('deleteCache').disabled=c;document.getElementById('deleteRobots').disabled=c;document.getElementById('deleteCrawlQueues').disabled=c;document.getElementById('deleteSearchFl').disabled=c;"
+             onclick="x=document.getElementById('deleteIndex').checked;document.getElementById('deleteRobots').checked=x;document.getElementById('deleteRobots').checked=x;document.getElementById('deleteCrawlQueues').checked=x;c='disabled';document.getElementById('deleteSearchFl').checked=x;if(x){c='';}document.getElementById('deleteTriplestore').disabled=c;document.getElementById('deletecomplete').disabled=c;document.getElementById('deleteCache').disabled=c;document.getElementById('deleteRobots').disabled=c;document.getElementById('deleteCrawlQueues').disabled=c;document.getElementById('deleteSearchFl').disabled=c;"
             /><label for="deleteIndex">Delete Search Index</label><br/>
             #(solr)#::<input type="checkbox" name="deleteSolr" id="deleteSolr"
              onclick="x=document.getElementById('deleteSolr').checked;document.getElementById('deleteRobots').checked=x;document.getElementById('deleteCrawlQueues').checked=x;c='disabled';document.getElementById('deleteSearchFl').checked=x;if(x){c='';}document.getElementById('deletecomplete').disabled=c;document.getElementById('deleteCache').disabled=c;document.getElementById('deleteRobots').disabled=c;document.getElementById('deleteCrawlQueues').disabled=c;document.getElementById('deleteSearchFl').disabled=c;"
             /><label for="deleteSolr">Delete Solr Index</label><br/>#(/solr)#
+            <input type="checkbox" name="deleteTriplestore" id="deleteTriplestore" disabled="disabled" /><label for="deleteTriplestore">Delete RDF Triplestore</label><br/>
             <input type="checkbox" name="deleteCache" id="deleteCache" disabled="disabled" /><label for="deleteCache">Delete HTTP &amp; FTP Cache</label><br/>
             <input type="checkbox" name="deleteCrawlQueues" id="deleteCrawlQueues" disabled="disabled" /><label for="deleteCrawlQueues">Stop Crawler and delete Crawl Queues</label><br/>
             <input type="checkbox" name="deleteRobots" id="deleteRobots" disabled="disabled" /><label for="deleteRobots">Delete robots.txt Cache</label><br/>

htroot/IndexControlRWIs_p.java

@@ -37,6 +37,7 @@ import java.util.TreeMap;
 import net.yacy.cora.date.GenericFormatter;
 import net.yacy.cora.document.ASCII;
 import net.yacy.cora.document.UTF8;
+import net.yacy.cora.lod.JenaTripleStore;
 import net.yacy.cora.protocol.RequestHeader;
 import net.yacy.cora.services.federated.yacy.CacheStrategy;
 import net.yacy.document.Condenser;
@@ -189,6 +190,9 @@ public class IndexControlRWIs_p
                     sb.crawlStacker.clear();
                     ResultURLs.clearStacks();
                 }
+                if ( post.get("deleteTriplestore", "").equals("on") ) {
+                    JenaTripleStore.clear();
+                }
                 if ( post.get("deleteCache", "").equals("on") ) {
                     Cache.clear();
                 }

source/net/yacy/cora/lod/JenaTripleStore.java

@@ -32,6 +32,9 @@ public class JenaTripleStore {
 
 	public static Model model = ModelFactory.createDefaultModel();
 	static {
+	    init();
+	}
+	private final static void init() {
         model.setNsPrefix(YaCyMetadata.PREFIX, YaCyMetadata.NAMESPACE);
         model.setNsPrefix(Tagging.DEFAULT_PREFIX, Tagging.DEFAULT_NAMESPACE);
         model.setNsPrefix(HttpHeader.PREFIX, HttpHeader.NAMESPACE);
@@ -108,6 +111,14 @@ public class JenaTripleStore {
 		}
 	}
 
+	/**
+	 * clear the triplestore
+	 */
+	public static void clear() {
+	    model = ModelFactory.createDefaultModel();
+	    init();
+	}
+
 	/**
 	 * Return a Resource instance with the given URI in this model.
 	 * @param uri