X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.db.layer0%2Fsrc%2Forg%2Fsimantics%2Fdb%2Flayer0%2Futil%2FLayer0Utils.java;h=ad8676f813bdb83d4da1adde8aed547c31541ddb;hp=610c8c8bd42d8735868cf1f80e4603ae5e63b7d8;hb=06aeb7cad707d1fed2c21c1ad9413aa97e901da7;hpb=c61c54a6d841c663bd43b40577fe469bffa15453

diff --git a/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/util/Layer0Utils.java b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/util/Layer0Utils.java
index 610c8c8bd..ad8676f81 100644
--- a/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/util/Layer0Utils.java
+++ b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/util/Layer0Utils.java
@@ -71,7 +71,6 @@ import org.simantics.db.common.primitiverequest.PossibleRelatedValue;
 import org.simantics.db.common.procedure.adapter.TransientCacheAsyncListener;
 import org.simantics.db.common.request.DelayedWriteRequest;
 import org.simantics.db.common.request.ObjectsWithType;
-import org.simantics.db.common.request.PossibleChild;
 import org.simantics.db.common.request.PossibleIndexRoot;
 import org.simantics.db.common.request.WriteRequest;
 import org.simantics.db.common.utils.CommonDBUtils;
@@ -116,9 +115,7 @@ import org.simantics.graph.representation.PrettyPrintTG;
 import org.simantics.graph.representation.TransferableGraph1;
 import org.simantics.layer0.Layer0;
 import org.simantics.operation.Layer0X;
-import org.simantics.scl.compiler.environment.Environments;
 import org.simantics.scl.compiler.runtime.RuntimeEnvironment;
-import org.simantics.scl.compiler.top.SCLExpressionCompilationException;
 import org.simantics.scl.compiler.types.Type;
 import org.simantics.scl.osgi.SCLOsgi;
 import org.simantics.scl.runtime.function.Function;
@@ -1205,6 +1202,10 @@ public class Layer0Utils {
 
     }
 
+    public static boolean isMarkedReadOnly(ReadGraph graph, Resource r) throws DatabaseException {
+        return Boolean.TRUE.equals( graph.getPossibleRelatedValue(r, graph.<Layer0>l0().readOnly, Bindings.BOOLEAN) );
+    }
+
     private static TransferableGraph1 makeTG(ReadGraph graph, Resource r) throws DatabaseException {
 
     	SimanticsClipboardImpl cp = new SimanticsClipboardImpl();
@@ -1382,6 +1383,41 @@ public class Layer0Utils {
     	return result;
     }
 
+    public static Resource possibleObjectForType(ReadGraph graph, Resource type, Resource relation) throws DatabaseException {
+        PropertyInfo pi = graph.syncRequest(new PropertyInfoRequest(relation));
+        return possibleObjectForType(graph, type, relation, pi.isFunctional);
+    }
+
+    public static Resource possibleObjectForType(ReadGraph graph, Resource type, Resource relation, boolean functional) throws DatabaseException {
+        if(functional) {
+            Layer0 L0 = Layer0.getInstance(graph);
+            Resource result = graph.getPossibleObject(type, relation);
+            if(result != null)
+                return result;
+            for(Resource su : graph.getObjects(L0.Inherits, type)) {
+                Resource r = possibleObjectForType(graph, su, relation, functional);
+                if(r != null) {
+                    if(result != null)
+                        return null;
+                    result = r;
+                }
+            }
+            return result;
+        } else {
+            Set<Resource> found = objectsForTypeNonFunctional(graph, type, relation, new HashSet<>());
+            return found.size() == 1 ? found.iterator().next() : null;
+        }
+    }
+
+    private static Set<Resource> objectsForTypeNonFunctional(ReadGraph graph, Resource type, Resource relation, Set<Resource> found) throws DatabaseException {
+        Layer0 L0 = Layer0.getInstance(graph);
+        found.addAll(graph.getObjects(type, relation));
+        for(Resource su : graph.getObjects(L0.Inherits, type)) {
+            objectsForTypeNonFunctional(graph, su, relation, found);
+        }
+        return found;
+    }
+
     public static Resource getPossiblePredicateByNameFromType(ReadGraph graph, Resource type, String name) throws DatabaseException {
     	Map<String,Resource> domain = getDomainOf(graph, type);
     	return domain.get(name);