bundles/org.simantics.issues.common/src/org/simantics/issues/common/DependencyIssueSynchronizer2.java

   1 package org.simantics.issues.common;
   2
   3 import java.util.Collections;
   4 import java.util.HashSet;
   5 import java.util.Set;
   6
   7 import org.simantics.db.Issue;
   8 import org.simantics.db.Resource;
   9 import org.simantics.db.WriteGraph;
  10 import org.simantics.db.common.procedure.adapter.TransientCacheListener;
  11 import org.simantics.db.common.request.WriteRequest;
  12 import org.simantics.db.exception.DatabaseException;
  13 import org.simantics.db.layer0.util.RemoverUtil;
  14 import org.simantics.issues.common.DependencyIssueValidator2.Contexts;
  15 import org.simantics.issues.common.DependencyIssueValidator2.DependencyIssueDescriptions;
  16 import org.simantics.issues.ontology.IssueResource;
  17 import org.simantics.layer0.Layer0;
  18
  19 public class DependencyIssueSynchronizer2 extends WriteRequest {
  20
  21         public static final boolean DEBUG = false;
  22
  23         private Resource resource;
  24         private Resource source;
  25
  26         public DependencyIssueSynchronizer2(Resource resource, Resource source) {
  27                 this.resource = resource;
  28                 this.source = source;
  29         }
  30
  31         @Override
  32         public void perform(WriteGraph graph) throws DatabaseException {
  33
  34                 if(DEBUG) System.err.println("Running DependencySynchronizer for " + resource);
  35
  36                 Set<Issue> existing = graph.syncRequest(new DependencyIssueDescriptions(source, resource), TransientCacheListener.<Set<Issue>>instance());
  37                 Set<Issue> contexts = Collections.emptySet();
  38
  39                 if(graph.hasStatement(resource)) {
  40                         contexts = graph.syncRequest(new Contexts(source, resource), TransientCacheListener.<Set<Issue>>instance());
  41                 }
  42
  43                 if(!existing.equals(contexts)) {
  44
  45                         Set<Issue> added = new HashSet<Issue>(contexts);
  46                         Set<Issue> removed = new HashSet<Issue>(existing);
  47                         added.removeAll(existing);
  48                         removed.removeAll(contexts);
  49
  50                         for(Issue add : added) {
  51                                 add.write(graph, source);
  52                         }
  53                         for(Issue remove : removed) {
  54                                 Resource issue = graph.sync(new IssueByList(source, remove));
  55                                 if (issue == null)
  56                                         // FIXME: when can this happen and what should be done in this case?
  57                                         continue;
  58                                 graph.deny(issue, Layer0.getInstance(graph).PartOf);
  59                                 graph.deny(source, IssueResource.getInstance(graph).IssueSource_Manages, issue);
  60                                 RemoverUtil.remove(graph, issue);
  61                         }
  62
  63                 }
  64
  65         }
  66
  67 }