From f7712cc0bf6460250ff605aaa8c9936fb930eb1e Mon Sep 17 00:00:00 2001
From: gojomo <gojomo@daa5b2f2-a927-0410-8b2d-f5f262fa301a>
Date: Fri, 29 Apr 2011 22:21:54 +0000
Subject: [PATCH] Clarification to help [HER-1885] source-report.txt empty *
 SourceTagsReport     informative note if there's none of the info needed for
 this report

---
 .../archive/crawler/reporting/SourceTagsReport.java    | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/engine/src/main/java/org/archive/crawler/reporting/SourceTagsReport.java b/engine/src/main/java/org/archive/crawler/reporting/SourceTagsReport.java
index 4678215e..840b2c6d 100644
--- a/engine/src/main/java/org/archive/crawler/reporting/SourceTagsReport.java
+++ b/engine/src/main/java/org/archive/crawler/reporting/SourceTagsReport.java
@@ -20,6 +20,7 @@ package org.archive.crawler.reporting;
 
 import java.io.PrintWriter;
 import java.util.Map;
+import java.util.Set;
 import java.util.concurrent.atomic.AtomicLong;
 
 import org.archive.bdb.DisposableStoredSortedMap;
@@ -34,9 +35,16 @@ public class SourceTagsReport extends Report {
     @Override
     public void write(PrintWriter writer) {
 
+        Set<String> sourceTags = stats.sourceHostDistribution.keySet();
+        
+        if(sourceTags.isEmpty()) {
+            writer.println("No source tag information. (Is 'sourceTagSeeds' enabled?)");
+            return; 
+        }
+        
         writer.print("[source] [host] [#urls]\n");
         // for each source
-        for (String sourceKey : stats.sourceHostDistribution.keySet()) {
+        for (String sourceKey : sourceTags) {
             Map<String,AtomicLong> hostCounts = 
                 (Map<String,AtomicLong>)stats.sourceHostDistribution.get(sourceKey);
             // sort hosts by #urls