Query DSL: query_string analyze wildcard option with prefix to automatically do OR'ed wildcard when its broken down into several tokens, closes elastic#1539.

Author: kimchy

modules/elasticsearch/src/main/java/org/apache/lucene/queryParser/MapperQueryParser.java

@@ -222,7 +222,15 @@ private Query getPossiblyAnalyzedPrefixQuery(String field, String termStr) throw
         if (tlist.size() == 1) {
             return super.getPrefixQuery(field, tlist.get(0));
         } else {
-            return super.getPrefixQuery(field, termStr);
+            // build a boolean query with prefix on each one...
+            List<BooleanClause> clauses = new ArrayList<BooleanClause>();
+            for (String token : tlist) {
+                clauses.add(new BooleanClause(super.getPrefixQuery(field, token), BooleanClause.Occur.SHOULD));
+            }
+            return getBooleanQuery(clauses, true);
+
+            //return super.getPrefixQuery(field, termStr);
+
             /* this means that the analyzer used either added or consumed
 * (common for a stemmer) tokens, and we can't build a PrefixQuery */
 //            throw new ParseException("Cannot build PrefixQuery with analyzer "