Fix turn restrictions when number of ext storages is greater than 1.

Author: Rungee

core/src/main/java/com/graphhopper/routing/QueryGraph.java

@@ -156,7 +156,9 @@ public QueryGraph(Graph graph) {
         mainNodes = graph.getNodes();
         mainEdges = graph.getAllEdges().getMaxId();
 
-        if (mainGraph.getExtension() instanceof TurnCostExtension)
+        // Modification by Maxim Rylov
+        // if (mainGraph.getExtension() instanceof TurnCostExtension)
+        if (Helper.getTurnCostExtensions(mainGraph.getExtension()) != null)
             wrappedExtension = new QueryGraphTurnExt();
         else
             wrappedExtension = mainGraph.getExtension();
@@ -775,7 +777,9 @@ class QueryGraphTurnExt extends TurnCostExtension {
         private final TurnCostExtension mainTurnExtension;
 
         public QueryGraphTurnExt() {
-            this.mainTurnExtension = (TurnCostExtension) mainGraph.getExtension();
+        	// Modification by Maxim Rylov
+            //this.mainTurnExtension = (TurnCostExtension) mainGraph.getExtension();
+        	this.mainTurnExtension = Helper.getTurnCostExtensions(mainGraph.getExtension());
         }
 
         @Override

reader-osm/src/main/java/com/graphhopper/reader/osm/OSMReader.java

@@ -456,7 +456,7 @@ public void processRelation(ReaderRelation relation) throws XMLStreamException {
         if (relation.hasTag("type", "restriction")) {
             OSMTurnRelation turnRelation = createTurnRelation(relation);
             if (turnRelation != null) {
-                GraphExtension extendedStorage = graph.getExtension();
+                GraphExtension extendedStorage = Helper.getTurnCostExtensions(graph.getExtension());
                 if (extendedStorage instanceof TurnCostExtension) {
                     TurnCostExtension tcs = (TurnCostExtension) extendedStorage;
                     Collection<TurnCostTableEntry> entries = analyzeTurnRelation(turnRelation);