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 NodesRequest(Variable var) {
  19         super(var);
  20         }
  21
  22         @Override
  23         public Set<Variable> perform(ReadGraph graph) throws DatabaseException {
  24
  25                 long s = System.nanoTime();
  26
  27                 StructuralResource2.getInstance(graph);
  28                 if(variable == null)
  29                         return Collections.emptySet();
  30
  31                 Set<Variable> nodes = new THashSet<Variable>();
  32                 Collection<Variable> children = graph.syncRequest(new VariableChildren(variable));
  33                 for(Variable child : children) {
  34                         Set<Variable> childNodes = graph.syncRequest(new NodesRequest2(child));
  35                         nodes.addAll(childNodes);
  36                 }
  37
  38         if(DocumentRequest.PROFILE) {
  39                 long dura = System.nanoTime()-s;
  40                 System.err.println("NodesRequest " + System.identityHashCode(this) + " in " + 1e-6*dura + "ms. " + variable.getURI(graph));
  41         }
  42
  43                 return nodes;
  44
  45         }
  46
  47 }