From 60ef31012a59c3e9e4e05bdfd35ed19bcabad634 Mon Sep 17 00:00:00 2001
From: David Huynh <dfhuynh@gmail.com>
Date: Mon, 10 May 2010 20:49:45 +0000
Subject: [PATCH] Check for missing "target" in protograph link node's
 serialized json object when reloading from project files.

git-svn-id: http://google-refine.googlecode.com/svn/trunk@702 7d457c2a-affb-35e4-300a-418c747d4874
---
 src/main/java/com/metaweb/gridworks/protograph/Protograph.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/metaweb/gridworks/protograph/Protograph.java b/src/main/java/com/metaweb/gridworks/protograph/Protograph.java
index d2e0db5df..751440dc3 100644
--- a/src/main/java/com/metaweb/gridworks/protograph/Protograph.java
+++ b/src/main/java/com/metaweb/gridworks/protograph/Protograph.java
@@ -92,7 +92,8 @@ public class Protograph implements Jsonizable {
                 
                 node2.addLink(new Link(
                     reconstructProperty(oLink.getJSONObject("property")),
-                    reconstructNode(oLink.getJSONObject("target"))
+                    oLink.has("target") && !oLink.isNull("target") ? 
+                		reconstructNode(oLink.getJSONObject("target")) : null
                 ));
             }
         }