bundles/org.simantics.spreadsheet.graph/src/org/simantics/spreadsheet/graph/SpreadsheetVariableBuilder.java

   1 package org.simantics.spreadsheet.graph;
   2
   3 import org.simantics.db.ReadGraph;
   4 import org.simantics.db.Resource;
   5 import org.simantics.db.exception.DatabaseException;
   6 import org.simantics.db.layer0.variable.NodeManagerVariableBuilder;
   7 import org.simantics.db.layer0.variable.NodeSupport;
   8 import org.simantics.db.layer0.variable.ProxyChildVariable;
   9 import org.simantics.db.layer0.variable.StandardGraphChildVariable;
  10 import org.simantics.db.layer0.variable.Variable;
  11 import org.simantics.db.layer0.variable.VariableNode;
  12 import org.simantics.spreadsheet.graph.function.SpreadsheetRootVariable;
  13
  14 public class SpreadsheetVariableBuilder extends NodeManagerVariableBuilder {
  15
  16     @Override
  17     public Variable buildChild(ReadGraph graph, Variable parent, VariableNode node, Resource child) throws DatabaseException {
  18
  19         // For proxies, return a variable with a node manager
  20         if(parent instanceof ProxyChildVariable) {
  21             String sessionName = parent.getURI(graph);
  22             return createChild(graph, parent, sessionName, child);
  23         }
  24         //  For others return a standard variable
  25         return new StandardGraphChildVariable(parent, node, child);
  26
  27     }
  28
  29     @Override
  30     protected Variable createChild(ReadGraph graph, Variable parent, String sessionName, Resource child) throws DatabaseException {
  31         NodeSupport<?> support = getNodeSupport(graph, sessionName);
  32         return new SpreadsheetRootVariable(parent, new VariableNode(support, getRoot(graph, support, sessionName)), child);
  33     }
  34
  35
  36         @Override
  37         protected NodeSupport<?> getNodeSupport(ReadGraph graph, String sessionName) throws DatabaseException {
  38         return SpreadsheetSessionManager.getInstance().getOrCreateNodeSupport(graph, sessionName);
  39         }
  40
  41         @Override
  42         protected Object getRoot(ReadGraph graph, NodeSupport<?> support, String sessionName) {
  43                 SpreadsheetNodeManager manager = (SpreadsheetNodeManager)support.manager;
  44                 return manager.getRoot();
  45         }
  46
  47 }