From 2099947cdff790b2be4541983796d12a27a25696 Mon Sep 17 00:00:00 2001
From: Mark Robert Miller <markrmiller@apache.org>
Date: Thu, 11 Jun 2009 01:45:00 +0000
Subject: [PATCH] LUCENE-1598: FieldComparatorSource should be Serializable for
 back compat with SortComparatorSource

git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@783598 13f79535-47bb-0310-9956-ffa450edef68
---
 src/java/org/apache/lucene/search/FieldComparatorSource.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/java/org/apache/lucene/search/FieldComparatorSource.java b/src/java/org/apache/lucene/search/FieldComparatorSource.java
index 9a5613ccc0f..ccd6cfd09c2 100644
--- a/src/java/org/apache/lucene/search/FieldComparatorSource.java
+++ b/src/java/org/apache/lucene/search/FieldComparatorSource.java
@@ -18,6 +18,7 @@ package org.apache.lucene.search;
  */
 
 import java.io.IOException;
+import java.io.Serializable;
 
 /**
  * Provides a {@link FieldComparator} for custom field sorting.
@@ -26,7 +27,7 @@ import java.io.IOException;
  * incompatible ways in the next release.
  *
  */
-public abstract class FieldComparatorSource {
+public abstract class FieldComparatorSource implements Serializable {
 
   /**
    * Creates a comparator for the field in the given index.