bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/request/ActivateModel.java

   1 package org.simantics.db.layer0.request;
   2
   3 import org.simantics.db.Resource;
   4 import org.simantics.db.VirtualGraph;
   5 import org.simantics.db.WriteGraph;
   6 import org.simantics.db.common.request.WriteResultRequest;
   7 import org.simantics.db.exception.DatabaseException;
   8 import org.simantics.db.service.VirtualGraphSupport;
   9 import org.simantics.operation.Layer0X;
  10
  11 public class ActivateModel extends WriteResultRequest<Boolean> {
  12
  13     final Resource project;
  14     final Resource model;
  15
  16     public ActivateModel(Resource project, Resource model) {
  17
  18         if(project == null) throw new IllegalArgumentException("project can not be null");
  19         this.project = project;
  20         this.model = model;
  21
  22     }
  23
  24     public static Boolean perform(WriteGraph graph, Resource project, Resource model) throws DatabaseException {
  25         Layer0X L0X = Layer0X.getInstance(graph);
  26         if (model != null) {
  27             if (!graph.hasStatement(model, L0X.IsActivatedBy, project)) {
  28                 graph.deny(project, L0X.Activates);
  29                 graph.claim(project, L0X.Activates, model);
  30                 return true;
  31             }
  32         } else {
  33             if (graph.hasStatement(project, L0X.Activates)) {
  34                 graph.deny(project, L0X.Activates);
  35                 return true;
  36             }
  37         }
  38         return false;
  39     }
  40
  41     @Override
  42     public Boolean perform(WriteGraph graph) throws DatabaseException {
  43         VirtualGraphSupport support = graph.getService(VirtualGraphSupport.class);
  44         VirtualGraph activations = support.getWorkspacePersistent("activations");
  45         VirtualGraph vg = graph.getProvider();
  46         if (vg == activations) {
  47             return perform(graph, project, model);
  48         } else {
  49             return graph.syncRequest(new WriteResultRequest<Boolean>(activations) {
  50                 @Override
  51                 public Boolean perform(WriteGraph graph) throws DatabaseException {
  52                     return ActivateModel.perform(graph, project, model);
  53                 }
  54             });
  55         }
  56     }
  57
  58 }