bundles/org.simantics.document.server/src/org/simantics/document/server/request/NodesRequest2.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.databoard.Bindings;
  10 import org.simantics.db.AsyncReadGraph;
  11 import org.simantics.db.ReadGraph;
  12 import org.simantics.db.Resource;
  13 import org.simantics.db.common.request.AsyncReadRequest;
  14 import org.simantics.db.exception.DatabaseException;
  15 import org.simantics.db.layer0.request.VariableChildren;
  16 import org.simantics.db.layer0.request.VariableRead;
  17 import org.simantics.db.layer0.variable.Variable;
  18 import org.simantics.db.procedure.AsyncProcedure;
  19 import org.simantics.document.base.ontology.DocumentationResource;
  20 import org.simantics.utils.threads.logger.ITask;
  21 import org.simantics.utils.threads.logger.ThreadLogger;
  22
  23 public class NodesRequest2 extends VariableRead<Set<Variable>> {
  24
  25     public NodesRequest2(Variable var) {
  26         super(var);
  27     }
  28
  29     @Override
  30     public Set<Variable> perform(ReadGraph graph) throws DatabaseException {
  31
  32         ITask task = DocumentRequest.PROFILE ? ThreadLogger.task(this) : null;
  33
  34         DocumentationResource DOC = DocumentationResource.getInstance(graph);
  35
  36         Resource type = variable.getPossibleType(graph);
  37         if(type == null) {
  38             if(DocumentRequest.PROFILE) task.finish();
  39             return Collections.emptySet();
  40         }
  41
  42         if(!graph.isInheritedFrom(type, DOC.Components_Component)) {
  43             if(DocumentRequest.PROFILE) task.finish();
  44             return Collections.emptySet();
  45         }
  46
  47         Boolean pathExists = variable.getPossiblePropertyValue(graph, DOC.Properties_pathExists, Bindings.BOOLEAN);
  48         if(pathExists != null && !pathExists) {
  49             if(DocumentRequest.PROFILE) task.finish();
  50             return Collections.emptySet();
  51         }
  52
  53         if(graph.isInheritedFrom(type, DOC.Components_PrimitiveComponent)) {
  54             if(DocumentRequest.PROFILE) task.finish();
  55             return Collections.singleton(variable);
  56         } else {
  57             Set<Variable> result = new THashSet<Variable>();
  58             Collection<Variable> children = graph.syncRequest(new VariableChildren(variable));
  59             graph.syncRequest(new AsyncReadRequest() {
  60
  61                 @Override
  62                 public void run(AsyncReadGraph graph) throws DatabaseException {
  63
  64                     for(Variable child : children) {
  65                         graph.asyncRequest(new NodesRequest2(child), new AsyncProcedure<Set<Variable>>() {
  66
  67                             @Override
  68                             public void execute(AsyncReadGraph graph, Set<Variable> vars) {
  69                                 synchronized(result) {
  70                                     result.addAll(vars);
  71                                 }
  72                             }
  73
  74                             @Override
  75                             public void exception(AsyncReadGraph graph, Throwable throwable) {
  76                             }
  77
  78                         });
  79                     }
  80
  81                 }
  82
  83             });
  84
  85             if(DocumentRequest.PROFILE) task.finish();
  86             return result;
  87
  88         }
  89
  90     }
  91
  92 }