bundles/org.simantics.selectionview/src/org/simantics/selectionview/SelectionViewUtils.java

   1 package org.simantics.selectionview;
   2
   3 import java.util.List;
   4
   5 import org.simantics.db.ReadGraph;
   6 import org.simantics.db.Resource;
   7 import org.simantics.db.exception.DatabaseException;
   8 import org.simantics.db.layer0.variable.Variable;
   9 import org.simantics.db.layer0.variable.Variables;
  10 import org.simantics.db.layer0.variable.Variables.Role;
  11 import org.simantics.scl.runtime.SCLContext;
  12 import org.simantics.scl.runtime.function.Function1;
  13
  14 public class SelectionViewUtils {
  15
  16         public static Variable getSpecialCategory(ReadGraph graph, Resource rule, Variable info) throws DatabaseException {
  17
  18                 SelectionViewResources SEL = SelectionViewResources.getInstance(graph);
  19                 Resource categoryResource = info.getPossibleRepresents(graph);
  20
  21                 if(SEL.CategoryHidden.equals(categoryResource)) {
  22
  23                         Variable property = info.getParent(graph);
  24                         Variable parent = property.getParent(graph);
  25                         if(Role.PROPERTY.equals(parent.getPossibleRole(graph))) return null;
  26
  27                         Resource predicate = property.getPossiblePredicateResource(graph);
  28                         Variable ruleVariable = Variables.getVariable(graph, rule);
  29
  30                         Function1<Object,List<?>> getSpecialCategory = ruleVariable.getPossiblePropertyValue(graph, SEL.getSpecialCategory);
  31                         if(getSpecialCategory == null) return null;
  32
  33                         SCLContext sclContext = SCLContext.getCurrent();
  34                 Object oldGraph = sclContext.get("graph");
  35                         try {
  36                                 sclContext.put("graph", graph);
  37                                 Resource cat = (Resource)getSpecialCategory.apply(predicate);
  38                                 if(cat != null) return Variables.getVariable(graph, cat);
  39                         } catch (Throwable t) {
  40                                 throw new DatabaseException(t);
  41                         } finally {
  42                     sclContext.put("graph", oldGraph);
  43                         }
  44                 }
  45
  46                 return null;
  47
  48         }
  49
  50 }