bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/viewpoint/VariableChildRule.java

   1 package org.simantics.modeling.ui.viewpoint;
   2
   3 import java.util.Collection;
   4 import java.util.Collections;
   5
   6 import org.simantics.browsing.ui.model.children.ChildRule;
   7 import org.simantics.db.ReadGraph;
   8 import org.simantics.db.exception.DatabaseException;
   9 import org.simantics.db.layer0.variable.Variable;
  10 import org.simantics.structural.stubs.StructuralResource2;
  11
  12 public class VariableChildRule implements ChildRule {
  13
  14     @Override
  15     public boolean isCompatible(Class<?> contentType) {
  16         return contentType.equals(Variable.class);
  17     }
  18
  19     @Override
  20     public Collection<?> getChildren(ReadGraph graph, Object parent)
  21             throws DatabaseException {
  22         Collection<Variable> children = ((Variable)parent).getChildren(graph);
  23         return VariableChildren.filterByClassification(graph, children, StructuralResource2.URIs.Component);
  24     }
  25
  26     @Override
  27     public Collection<?> getParents(ReadGraph graph, Object child)
  28             throws DatabaseException {
  29         Variable parent = ((Variable)child).getParent(graph);
  30         if(parent == null)
  31             return Collections.emptyList();
  32         else
  33             return Collections.singleton(parent);
  34     }
  35
  36
  37 }