Prevent IndexRoot requests from crashing when network diagram is removed

Use PossibleIndexRoot instead.

gitlab #65

Change-Id: I344249dc125d057c17718ad2fdfb98ef267c702b

diff --git a/org.simantics.district.network.ui/src/org/simantics/district/network/ui/DistrictDiagramViewer.java b/org.simantics.district.network.ui/src/org/simantics/district/network/ui/DistrictDiagramViewer.java
index 25956b31aaa701d772a2cc4fb3be0af0e7786c61..0e0a2f5244e517c1dc2fbd9ccf3ab4eec345d4a9 100644 (file)
--- a/org.simantics.district.network.ui/src/org/simantics/district/network/ui/DistrictDiagramViewer.java
+++ b/org.simantics.district.network.ui/src/org/simantics/district/network/ui/DistrictDiagramViewer.java
@@ -12,7 +12,7 @@ import java.util.function.Supplier;
 import org.simantics.datatypes.literal.RGB;
 import org.simantics.db.ReadGraph;
 import org.simantics.db.Resource;
-import org.simantics.db.common.request.IndexRoot;
+import org.simantics.db.common.request.PossibleIndexRoot;
 import org.simantics.db.common.request.UnaryRead;
 import org.simantics.db.exception.DatabaseException;
 import org.simantics.db.procedure.Listener;
@@ -154,8 +154,9 @@ public class DistrictDiagramViewer extends DiagramViewer {
     public void dispose() {
         DistrictDiagramViewerListener[] listeners = Activator.getInstance().getDistrictDiagramViewerListeners();
         if (listeners != null) {
+            Resource runtime = getRuntime();
             for (DistrictDiagramViewerListener listener : listeners) {
-                listener.diagramDisposed(getRuntime(), canvasContext);
+                listener.diagramDisposed(runtime, canvasContext);
             }
         }
         super.dispose();
@@ -346,15 +347,17 @@ public class DistrictDiagramViewer extends DiagramViewer {
         @Override
         public ColorBarOptions perform(ReadGraph graph) throws DatabaseException {
             DistrictNetworkResource DN = DistrictNetworkResource.getInstance(graph);
-            Resource model = graph.syncRequest(new IndexRoot(parameter));
-            Resource vf = DynamicVisualisations.getVisualisationFolder(graph, model);
-            if (vf != null) {
-                Resource activeVisualisation = graph.getPossibleObject(vf, DN.Diagram_hasActiveVisualisation);
-                if (activeVisualisation != null) {
-                    return DynamicVisualisations.colorBarOptions(graph, activeVisualisation);
+            Resource model = graph.syncRequest(new PossibleIndexRoot(parameter));
+            if (model != null) {
+                Resource vf = DynamicVisualisations.getVisualisationFolder(graph, model);
+                if (vf != null) {
+                    Resource activeVisualisation = graph.getPossibleObject(vf, DN.Diagram_hasActiveVisualisation);
+                    if (activeVisualisation != null) {
+                        return DynamicVisualisations.colorBarOptions(graph, activeVisualisation);
+                    }
+                } else {
+                    LOGGER.debug("No visualisation folder available for model {}", model);
                 }
-            } else {
-                LOGGER.debug("No visualisation folder available for model {}", model);
             }
             return ColorBarOptions.useDefault();
         }
@@ -369,15 +372,17 @@ public class DistrictDiagramViewer extends DiagramViewer {
         @Override
         public Map<String, DynamicColorContribution> perform(ReadGraph graph) throws DatabaseException {
             DistrictNetworkResource DN = DistrictNetworkResource.getInstance(graph);
-            Resource model = graph.syncRequest(new IndexRoot(parameter));
-            Resource vf = DynamicVisualisations.getVisualisationFolder(graph, model);
-            if (vf != null) {
-                Resource activeVisualisation = graph.getPossibleObject(vf, DN.Diagram_hasActiveVisualisation);
-                if (activeVisualisation != null) {
-                    return DynamicVisualisations.colorContributions(graph, activeVisualisation);
+            Resource model = graph.syncRequest(new PossibleIndexRoot(parameter));
+            if (model != null) {
+                Resource vf = DynamicVisualisations.getVisualisationFolder(graph, model);
+                if (vf != null) {
+                    Resource activeVisualisation = graph.getPossibleObject(vf, DN.Diagram_hasActiveVisualisation);
+                    if (activeVisualisation != null) {
+                        return DynamicVisualisations.colorContributions(graph, activeVisualisation);
+                    }
+                } else {
+                    LOGGER.debug("No visualisation folder available for model {}", model);
                 }
-            } else {
-                LOGGER.debug("No visualisation folder available for model {}", model);
             }
             return Collections.emptyMap();
         }
@@ -450,15 +455,17 @@ public class DistrictDiagramViewer extends DiagramViewer {
         @Override
         public SizeBarOptions perform(ReadGraph graph) throws DatabaseException {
             DistrictNetworkResource DN = DistrictNetworkResource.getInstance(graph);
-            Resource model = graph.syncRequest(new IndexRoot(parameter));
-            Resource vf = DynamicVisualisations.getVisualisationFolder(graph, model);
-            if (vf != null) {
-                Resource activeVisualisation = graph.getPossibleObject(vf, DN.Diagram_hasActiveVisualisation);
-                if (activeVisualisation != null) {
-                    return DynamicVisualisations.sizeBarOptions(graph, activeVisualisation);
+            Resource model = graph.syncRequest(new PossibleIndexRoot(parameter));
+            if (model != null) {
+                Resource vf = DynamicVisualisations.getVisualisationFolder(graph, model);
+                if (vf != null) {
+                    Resource activeVisualisation = graph.getPossibleObject(vf, DN.Diagram_hasActiveVisualisation);
+                    if (activeVisualisation != null) {
+                        return DynamicVisualisations.sizeBarOptions(graph, activeVisualisation);
+                    }
+                } else {
+                    LOGGER.debug("No visualisation folder available for model {}", model);
                 }
-            } else {
-                LOGGER.debug("No visualisation folder available for model {}", model);
             }
             return SizeBarOptions.useDefault();
         }
@@ -501,15 +508,17 @@ public class DistrictDiagramViewer extends DiagramViewer {
         @Override
         public Map<String, DynamicSizeContribution> perform(ReadGraph graph) throws DatabaseException {
             DistrictNetworkResource DN = DistrictNetworkResource.getInstance(graph);
-            Resource model = graph.syncRequest(new IndexRoot(parameter));
-            Resource vf = DynamicVisualisations.getVisualisationFolder(graph, model);
-            if (vf != null) {
-                Resource activeVisualisation = graph.getPossibleObject(vf, DN.Diagram_hasActiveVisualisation);
-                if (activeVisualisation != null) {
-                    return DynamicVisualisations.sizeContributions(graph, activeVisualisation);
+            Resource model = graph.syncRequest(new PossibleIndexRoot(parameter));
+            if (model != null) {
+                Resource vf = DynamicVisualisations.getVisualisationFolder(graph, model);
+                if (vf != null) {
+                    Resource activeVisualisation = graph.getPossibleObject(vf, DN.Diagram_hasActiveVisualisation);
+                    if (activeVisualisation != null) {
+                        return DynamicVisualisations.sizeContributions(graph, activeVisualisation);
+                    }
+                } else {
+                    LOGGER.debug("No visualisation folder available for model {}", model);
                 }
-            } else {
-                LOGGER.debug("No visualisation folder available for model {}", model);
             }
             return Collections.emptyMap();
         }