org.simantics.interop.update/src/org/simantics/interop/update/model/PropertyChange.java

   1 package org.simantics.interop.update.model;
   2
   3 import org.simantics.db.Resource;
   4 import org.simantics.db.Statement;
   5 import org.simantics.db.WriteGraph;
   6 import org.simantics.db.exception.DatabaseException;
   7 import org.simantics.interop.test.GraphChanges;
   8 import org.simantics.utils.datastructures.Pair;
   9
  10 public class PropertyChange {
  11         protected GraphChanges changes;
  12         protected Pair<Statement, Statement> pair;
  13         protected boolean applied = false;
  14         protected boolean selected = false;
  15
  16
  17         public PropertyChange(GraphChanges changes, Statement first, Statement second) {
  18                 this.pair = new Pair<Statement, Statement>(first, second);
  19                 this.changes = changes;
  20         }
  21
  22         public PropertyChange(GraphChanges changes, Pair<Statement, Statement> change) {
  23                 this.pair = change;
  24                 this.changes = changes;
  25         }
  26
  27         public Statement getFirst() {
  28                 return pair.first;
  29         }
  30
  31         public Statement getSecond() {
  32                 return pair.second;
  33         }
  34
  35         public GraphChanges getChanges() {
  36                 return changes;
  37         }
  38
  39         @Override
  40         public int hashCode() {
  41                 return pair.hashCode();
  42         }
  43
  44         @Override
  45         public boolean equals(Object obj) {
  46                 if (obj == null)
  47                         return false;
  48                 if (obj.getClass() != this.getClass())
  49                         return false;
  50                 PropertyChange c = (PropertyChange)obj;
  51                 return pair.equals(c.pair);
  52         }
  53
  54         public void apply(WriteGraph graph) throws DatabaseException {
  55                 if (applied)
  56                         return;
  57                 if (pair.second == null) {
  58                         graph.deny(pair.first);
  59                         return;
  60                 }
  61                 Resource s = changes.getComparable().getLeft(pair.second.getSubject());
  62                 //Resource s = pair.first.getSubject();
  63                 Resource pred = pair.second.getPredicate();
  64                 if (graph.hasValue(pair.second.getObject())) {
  65                         Object value = graph.getValue(pair.second.getObject());
  66                         graph.claimLiteral(s, pred, value);
  67                 } else {
  68                         graph.deny(s,pred);
  69                 }
  70                 applied = true;
  71
  72         }
  73
  74         public boolean select(boolean select) {
  75                 if (applied)
  76                         return false;
  77                 this.selected = select;
  78                 return true;
  79         }
  80
  81
  82         public boolean selected() {
  83                 return selected;
  84         }
  85
  86         public boolean applied() {
  87                 return applied;
  88         }
  89
  90
  91 }