bundles/org.simantics.document.server/src/org/simantics/document/server/request/NodesRequest.java

   1 package org.simantics.document.server.request;
   2
   3 import gnu.trove.set.hash.THashSet;
   4
   5 import java.util.Collection;
   6 import java.util.Collections;
   7 import java.util.Set;
   8
   9 import org.simantics.db.ReadGraph;
  10 import org.simantics.db.exception.DatabaseException;
  11 import org.simantics.db.layer0.request.VariableChildren;
  12 import org.simantics.db.layer0.request.VariableRead;
  13 import org.simantics.db.layer0.variable.Variable;
  14 import org.simantics.structural.stubs.StructuralResource2;
  15
  16 public class NodesRequest extends VariableRead<Set<Variable>> {
  17
  18         public static boolean PROFILE = false;
  19
  20     public NodesRequest(Variable var) {
  21         super(var);
  22         }
  23
  24         @Override
  25         public Set<Variable> perform(ReadGraph graph) throws DatabaseException {
  26
  27                 long s = System.nanoTime();
  28
  29                 StructuralResource2.getInstance(graph);
  30                 if(variable == null)
  31                         return Collections.emptySet();
  32
  33                 Set<Variable> nodes = new THashSet<Variable>();
  34                 Collection<Variable> children = graph.syncRequest(new VariableChildren(variable));
  35                 for(Variable child : children) {
  36                         Set<Variable> childNodes = graph.syncRequest(new NodesRequest2(child));
  37                         nodes.addAll(childNodes);
  38                 }
  39
  40         if(PROFILE) {
  41                 long dura = System.nanoTime()-s;
  42                 System.err.println("NodesRequest " + System.identityHashCode(this) + " in " + 1e-6*dura + "ms. " + variable.getURI(graph));
  43         }
  44
  45                 return nodes;
  46
  47         }
  48
  49 }