+package org.simantics.modeling;
+
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.common.procedure.adapter.TransientCacheListener;
+import org.simantics.db.common.utils.NameUtils;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.layer0.variable.StandardGraphChildVariable;
+import org.simantics.db.layer0.variable.StandardGraphPropertyVariable;
+import org.simantics.db.layer0.variable.Variable;
+import org.simantics.db.layer0.variable.VariableBuilder;
+import org.simantics.db.layer0.variable.VariableNode;
+
+public class ImmutableComponentVariableBuilder<Node> implements VariableBuilder<Node> {
+
+ @Override
+ public Variable buildChild(ReadGraph graph, Variable parent, VariableNode<Node> node, Resource child) throws DatabaseException {
+ if(graph.isImmutable(child)) {
+ ImmutableComponentVariableContent content = graph.syncRequest(new ImmutableComponentVariableContentRequest(child), TransientCacheListener.instance());
+ return new ImmutableComponentVariable(parent, content);
+ } else {
+ return new StandardGraphChildVariable(parent, node, child);
+ }
+ }
+
+ @Override
+ public Variable buildProperty(ReadGraph graph, Variable parent, VariableNode<Node> node, Resource subject, Resource predicate) throws DatabaseException {
+ return new StandardGraphPropertyVariable(graph, parent, node, subject, predicate);
+ }
+
+}