bundles/org.simantics.modeling/src/org/simantics/modeling/adapters/SCLChildRule.java

   1 package org.simantics.modeling.adapters;\r
   2 \r
   3 import java.util.Collection;\r
   4 import java.util.Collections;\r
   5 import java.util.List;\r
   6 \r
   7 import org.simantics.browsing.ui.model.children.ChildRule;\r
   8 import org.simantics.db.ReadGraph;\r
   9 import org.simantics.db.Resource;\r
  10 import org.simantics.db.exception.DatabaseException;\r
  11 import org.simantics.db.layer0.variable.Variable;\r
  12 import org.simantics.db.layer0.variable.Variables;\r
  13 import org.simantics.modeling.ModelingResources;\r
  14 import org.simantics.scl.runtime.SCLContext;\r
  15 import org.simantics.scl.runtime.function.Function1;\r
  16 \r
  17 public class SCLChildRule implements ChildRule {\r
  18 \r
  19     private Resource rule;\r
  20     \r
  21     public SCLChildRule(ReadGraph graph, Resource rule) {\r
  22         this.rule = rule;\r
  23     }\r
  24     \r
  25     @Override\r
  26     public boolean isCompatible(Class<?> contentType) {\r
  27         return contentType.equals(Resource.class) || contentType.equals(Variable.class);\r
  28     }\r
  29 \r
  30     @Override\r
  31     public Collection<?> getChildren(ReadGraph graph, Object parent) throws DatabaseException {\r
  32         \r
  33         ModelingResources MOD = ModelingResources.getInstance(graph);\r
  34         \r
  35         Variable ruleVariable = Variables.getVariable(graph, rule);\r
  36 \r
  37         Function1<Object,List<?>> getChildren = ruleVariable.getPossiblePropertyValue(graph, MOD.SCLChildRule_getChildren);\r
  38         if(getChildren == null) return Collections.emptyList();\r
  39 \r
  40         SCLContext sclContext = SCLContext.getCurrent();\r
  41         Object oldGraph = sclContext.get("graph");\r
  42         try {\r
  43             sclContext.put("graph", graph);\r
  44             Object value = getChildren.apply(parent);\r
  45             return (Collection<?>)value;\r
  46         } catch (Throwable t) {\r
  47                 throw new DatabaseException(t);\r
  48         } finally {\r
  49             sclContext.put("graph", oldGraph);\r
  50         }\r
  51 \r
  52     }\r
  53 \r
  54     @Override\r
  55     public Collection<?> getParents(ReadGraph graph, Object child) throws DatabaseException {\r
  56         return null;\r
  57     }\r
  58 \r
  59 }\r