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

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