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

   1 package org.simantics.modeling.adapters;
   2
   3 import java.util.Collection;
   4 import java.util.Collections;
   5 import java.util.List;
   6
   7 import org.simantics.browsing.ui.model.children.ChildRule;
   8 import org.simantics.db.ReadGraph;
   9 import org.simantics.db.Resource;
  10 import org.simantics.db.exception.DatabaseException;
  11 import org.simantics.db.layer0.variable.Variable;
  12 import org.simantics.db.layer0.variable.Variables;
  13 import org.simantics.modeling.ModelingResources;
  14 import org.simantics.scl.runtime.SCLContext;
  15 import org.simantics.scl.runtime.function.Function1;
  16
  17 public class SCLChildRule implements ChildRule {
  18
  19     private Resource rule;
  20
  21     public SCLChildRule(ReadGraph graph, Resource rule) {
  22         this.rule = rule;
  23     }
  24
  25     @Override
  26     public boolean isCompatible(Class<?> contentType) {
  27         return contentType.equals(Resource.class) || contentType.equals(Variable.class);
  28     }
  29
  30     @Override
  31     public Collection<Resource> getChildren(ReadGraph graph, Object parent) throws DatabaseException {
  32         Resource parentResource;
  33
  34         if (parent instanceof Variable) {
  35             parentResource = ((Variable)parent).getRepresents(graph);
  36         } else {
  37             parentResource = (Resource)parent;
  38         }
  39
  40         ModelingResources MOD = ModelingResources.getInstance(graph);
  41
  42         Variable ruleVariable = Variables.getVariable(graph, rule);
  43
  44         Function1<Resource,List<Resource>> getChildren = ruleVariable.getPossiblePropertyValue(graph, MOD.SCLChildRule_getChildren);
  45         if(getChildren == null) return Collections.emptyList();
  46
  47         SCLContext sclContext = SCLContext.getCurrent();
  48         Object oldGraph = sclContext.get("graph");
  49         try {
  50             sclContext.put("graph", graph);
  51             return getChildren.apply(parentResource);
  52         } catch (Throwable t) {
  53                 throw new DatabaseException(t);
  54         } finally {
  55             sclContext.put("graph", oldGraph);
  56         }
  57
  58     }
  59
  60     @Override
  61     public Collection<?> getParents(ReadGraph graph, Object child) throws DatabaseException {
  62         return null;
  63     }
  64
  65 }