enhanced solr queries for single document extraction

source/net/yacy/cora/federate/solr/connector/AbstractSolrConnector.java

@@ -273,7 +273,12 @@ public abstract class AbstractSolrConnector implements SolrConnector {
             final String ... fields) {
         // construct query
         final SolrQuery params = new SolrQuery();
-        params.setQuery(querystring);
+        if (count < 2 && querystring.startsWith("{!raw f=")) {
+            params.setQuery("*:*");
+            params.addFilterQuery(querystring);
+        } else {
+            params.setQuery(querystring);
+        }
         params.clearSorts();
         if (sort != null) {
             params.set("sort", sort);
@@ -305,7 +310,10 @@ public abstract class AbstractSolrConnector implements SolrConnector {
         // construct raw query
         final SolrQuery params = new SolrQuery();
         //params.setQuery(CollectionSchema.id.getSolrFieldName() + ":\"" + id + "\"");
-        params.setQuery("{!raw f=" + CollectionSchema.id.getSolrFieldName() + "}" + id);
+        String q = "{!raw f=" + CollectionSchema.id.getSolrFieldName() + "}" + id;
+        //params.setQuery(q);
+        params.setQuery("*:*");
+        params.addFilterQuery(q);
         //params.set("defType", "raw");
         params.setRows(1);
         params.setStart(0);