Direct and synchronization-free access to Layer0 resource class for DB

[simantics/platform.git] / bundles / org.simantics.db.layer0 / src / org / simantics / db / layer0 / adapter / ContextualRelatedValue.java

diff --git a/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/adapter/ContextualRelatedValue.java b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/adapter/ContextualRelatedValue.java
index 517ce761ed4d7d8686ae501ae942090f5854fc61..6ad6315b989c8b0704c78f53519131864fa53fc2 100644 (file)
--- a/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/adapter/ContextualRelatedValue.java
+++ b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/adapter/ContextualRelatedValue.java
@@ -27,41 +27,43 @@ import org.simantics.scl.runtime.function.FunctionImpl3;
  */
 public abstract class ContextualRelatedValue implements ConverterComputationalValue {
 
-    @SuppressWarnings("unchecked")
-    @Override
-    public <T> T getValue(ReadGraph graph, Resource resource) throws DatabaseException {
-        return (T) new FunctionImpl3<ReadGraph, Resource, Object, Object>() {
-            @Override
-            public Object apply(ReadGraph graph, Resource converter, Object context) {
-                SCLContext sclContext = SCLContext.getCurrent();
-                Object oldGraph = sclContext.get("graph");
-                try {
-                    if (context instanceof Variable) {
-                        Variable variable = (Variable)context;
-                        try {
-                            Function1<Object,Object> fn = getFunction(graph, variable.getParent(graph).getRepresents(graph), variable.getRepresents(graph), variable.getPredicateResource(graph));
-                            sclContext.put("graph", graph);
-                            return fn.apply(variable);
-                        } catch (DatabaseException e) {
-                            throw new RuntimeDatabaseException(e);
-                        }
-                    } if (context instanceof Resource) {
-                        Resource resource = (Resource)context;
-                        try {
-                            // Here converter is the object and context is the subject
-                            Function1<Object,Object> fn = getFunction(graph, resource, converter, null);
-                            return fn.apply(resource);
-                        } catch (DatabaseException e) {
-                            throw new RuntimeDatabaseException(e);
-                        }
-                    } else {
-                        throw new IllegalStateException("Unknown context " + context);
+    private final FunctionImpl3<ReadGraph, Resource, Object, Object> function = new FunctionImpl3<ReadGraph, Resource, Object, Object>() {
+        @Override
+        public Object apply(ReadGraph graph, Resource converter, Object context) {
+            SCLContext sclContext = SCLContext.getCurrent();
+            Object oldGraph = sclContext.get("graph");
+            try {
+                if (context instanceof Variable) {
+                    Variable variable = (Variable)context;
+                    try {
+                        Function1<Object,Object> fn = getFunction(graph, variable.getParent(graph).getRepresents(graph), variable.getRepresents(graph), variable.getPredicateResource(graph));
+                        sclContext.put("graph", graph);
+                        return fn.apply(variable);
+                    } catch (DatabaseException e) {
+                        throw new RuntimeDatabaseException(e);
+                    }
+                } if (context instanceof Resource) {
+                    Resource resource = (Resource)context;
+                    try {
+                        // Here converter is the object and context is the subject
+                        Function1<Object,Object> fn = getFunction(graph, resource, converter, null);
+                        return fn.apply(resource);
+                    } catch (DatabaseException e) {
+                        throw new RuntimeDatabaseException(e);
                     }
-                } finally {
-                    sclContext.put("graph", oldGraph);
+                } else {
+                    throw new IllegalStateException("Unknown context " + context);
                 }
+            } finally {
+                sclContext.put("graph", oldGraph);
             }
-        };
+        }
+    };
+
+    @SuppressWarnings("unchecked")
+    @Override
+    public <T> T getValue(ReadGraph graph, Resource resource) throws DatabaseException {
+        return (T) function;
     }
 
 }