From 0a9ff14d96714eacfd759447fa1cfa58a1e8f257 Mon Sep 17 00:00:00 2001
From: luccioman <luccioman@users.noreply.github.com>
Date: Wed, 7 Sep 2016 10:03:48 +0200
Subject: [PATCH] Fixed NullPointerException case and added Javadoc

---
 .../solr/responsewriter/OpensearchResponseWriter.java    | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/source/net/yacy/cora/federate/solr/responsewriter/OpensearchResponseWriter.java b/source/net/yacy/cora/federate/solr/responsewriter/OpensearchResponseWriter.java
index d6f728ca3..7445cddf5 100644
--- a/source/net/yacy/cora/federate/solr/responsewriter/OpensearchResponseWriter.java
+++ b/source/net/yacy/cora/federate/solr/responsewriter/OpensearchResponseWriter.java
@@ -343,13 +343,20 @@ public class OpensearchResponseWriter implements QueryResponseWriter {
         return;
     }
 
+    /**
+     * @param snippets snippets list eventually empty
+     * @return the largest snippet containing at least a space character among the list, or null
+     */
     public static String getLargestSnippet(LinkedHashSet<String> snippets) {
         if (snippets == null || snippets.size() == 0) return null;
         String l = null;
         for (String s: snippets) {
             if ((l == null || s.length() > l.length()) && s.indexOf(' ') > 0) l = s;
         }
-        return l.replaceAll("\"", "'");
+        if(l != null) {
+        	l = l.replaceAll("\"", "'");
+        }
+        return l;
     }
     
     public static void openTag(final Writer writer, final String tag) throws IOException {