From 209d3c557147c8c2c8ae4d8500d1b9a8c5c3166d Mon Sep 17 00:00:00 2001
From: Reino Ruusu <reino.ruusu@semantum.fi>
Date: Mon, 16 Mar 2020 22:00:33 +0200
Subject: [PATCH 1/1] Prevent exceptions in procedural substructure requests

gitlab #497

Change-Id: Iaec7ce4ac40fb07d7b91ab2d6d9f3609b10facaa
---
 .../ProceduralSubstructureMapRequest.java     | 22 ++++++++++++++-----
 1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/bundles/org.simantics.modeling/src/org/simantics/modeling/ProceduralSubstructureMapRequest.java b/bundles/org.simantics.modeling/src/org/simantics/modeling/ProceduralSubstructureMapRequest.java
index e8c54fa98..6256891b8 100644
--- a/bundles/org.simantics.modeling/src/org/simantics/modeling/ProceduralSubstructureMapRequest.java
+++ b/bundles/org.simantics.modeling/src/org/simantics/modeling/ProceduralSubstructureMapRequest.java
@@ -3,6 +3,7 @@ package org.simantics.modeling;
 import gnu.trove.map.hash.THashMap;
 
 import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
 import org.simantics.db.exception.DatabaseException;
 import org.simantics.db.layer0.request.PropertyInfo;
 import org.simantics.db.layer0.request.PropertyInfoRequest;
@@ -21,19 +22,28 @@ public class ProceduralSubstructureMapRequest extends VariableRead<THashMap<Stri
     public THashMap<String, Pair<String,Type>> perform(ReadGraph graph) throws DatabaseException {
         THashMap<String, Pair<String,Type>> propertyMap = new THashMap<String, Pair<String,Type>>();
         for(Variable child : variable.getChildren(graph)) {
-        	for(Variable property : child.getProperties(graph)) {
-        	    PropertyInfo propertyInfo = graph.syncRequest(new PropertyInfoRequest(property.getPredicateResource(graph)));
+            for(Variable property : child.getProperties(graph)) {
+                Resource predicate = property.getPossiblePredicateResource(graph);
+                if (predicate == null)
+                    continue;
+                
+                PropertyInfo propertyInfo = graph.syncRequest(new PropertyInfoRequest(predicate));
                 propertyMap.put(child.getName(graph) + "." + propertyInfo.name,
                         Pair.make("/" + child.getName(graph) + "#" + propertyInfo.name,
                                 SCLTypeUtils.getType(propertyInfo)));
-        	}
+            }
         }
-    	for(Variable property : variable.getProperties(graph)) {
-    	    PropertyInfo propertyInfo = graph.syncRequest(new PropertyInfoRequest(property.getPredicateResource(graph)));
+        for(Variable property : variable.getProperties(graph)) {
+            Resource predicate = property.getPossiblePredicateResource(graph);
+            if (predicate == null)
+                continue;
+            
+            PropertyInfo propertyInfo = graph.syncRequest(new PropertyInfoRequest(predicate));
             propertyMap.put(propertyInfo.name,
                     Pair.make("#" + propertyInfo.name,
                             SCLTypeUtils.getType(propertyInfo)));
-    	}
+        }
+        
         return propertyMap;
     }
 
-- 
2.43.2