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.layer0.Layer0;
   9 import org.simantics.utils.datastructures.Pair;
  10
  11 public class PropertyChange {
  12         protected GraphChanges changes;
  13         protected Resource leftSubject;
  14         protected Resource rightSubject;
  15         protected Pair<Statement, Statement> pair;
  16         protected boolean applied = false;
  17         protected boolean selected = false;
  18         protected boolean visible = true;
  19         protected boolean enabled = true;
  20         protected Object customValue = null;
  21
  22
  23         public PropertyChange(GraphChanges changes, Resource left, Statement first, Resource right, Statement second) {
  24                 if (first == null && second == null)
  25                         throw new IllegalArgumentException("At least one of the stamenents must be non null.");
  26                 if (left == null || right == null)
  27                         throw new IllegalArgumentException("Subject resources cannot be null.");
  28                 this.pair = new Pair<Statement, Statement>(first, second);
  29                 this.changes = changes;
  30                 this.leftSubject = left;
  31                 this.rightSubject = right;
  32         }
  33
  34         public PropertyChange(GraphChanges changes, Resource left, Resource right, Pair<Statement, Statement> change) {
  35                 if (change == null || (change.first == null && change.second == null))
  36                         throw new IllegalArgumentException("At least one of the stamenents must be non null.");
  37                 if (left == null || right == null)
  38                         throw new IllegalArgumentException("Subject resources cannot be null.");
  39                 this.pair = change;
  40                 this.changes = changes;
  41                 this.leftSubject = left;
  42                 this.rightSubject = right;
  43         }
  44
  45
  46         public Resource getFirstSubject() {
  47                 return leftSubject;
  48         }
  49
  50         public Statement getFirst() {
  51                 return pair.first;
  52         }
  53
  54         public Resource getSecondSubject() {
  55                 return rightSubject;
  56         }
  57
  58         public Statement getSecond() {
  59                 return pair.second;
  60         }
  61
  62         public Resource getPredicate() {
  63             if (pair.first != null)
  64                 return pair.first.getPredicate();
  65             return pair.second.getPredicate();
  66         }
  67
  68         public GraphChanges getChanges() {
  69                 return changes;
  70         }
  71
  72         @Override
  73         public int hashCode() {
  74                 return pair.hashCode();
  75         }
  76
  77         @Override
  78         public boolean equals(Object obj) {
  79                 if (obj == null)
  80                         return false;
  81                 if (obj.getClass() != this.getClass())
  82                         return false;
  83                 PropertyChange c = (PropertyChange)obj;
  84                 return pair.equals(c.pair);
  85         }
  86
  87         public void apply(WriteGraph graph) throws DatabaseException {
  88                 if (applied)
  89                         return;
  90                 if (pair.second == null) {
  91                         graph.deny(leftSubject, pair.first.getPredicate(),pair.first.getObject());
  92                         return;
  93                 }
  94                 Layer0 L0 = Layer0.getInstance(graph);
  95                 Resource s = leftSubject;
  96                 if (graph.isInstanceOf(pair.second.getObject(), L0.Literal)) {
  97                         Object value = null;
  98                         if (customValue != null)
  99                                 value = customValue;
 100                         else if (graph.hasValue(pair.second.getObject())) {
 101                                 value = graph.getValue(pair.second.getObject());
 102                         }
 103                         Resource pred = pair.second.getPredicate();
 104                         if (value != null) {
 105                                 graph.deny(s, pred);
 106                                 graph.claimLiteral(s, pred, value);
 107                         } else {
 108                                 graph.deny(s,pred);
 109                         }
 110                 } else if (graph.isInstanceOf(pair.second.getObject(), L0.SCLValue)) {
 111                         Resource pred = pair.second.getPredicate();
 112                         graph.deny(s, pred);
 113                         Resource valueResource = graph.newResource();
 114                         graph.claim(valueResource, L0.InstanceOf, graph.getSingleObject(pair.second.getObject(), L0.InstanceOf));
 115                         AddDeleteUpdateOp.copyProperties(graph, pair.second.getObject(), valueResource);
 116                         graph.claim(s, pred, valueResource);
 117                 }
 118                 applied = true;
 119         }
 120
 121         /**
 122          * Sets selected state.
 123          * @param select
 124          * @return true if selection state was changed
 125          */
 126         public boolean select(boolean select) {
 127             if (!enabled)
 128                 return false;
 129                 if (applied)
 130                         return false;
 131                 this.selected = select;
 132                 return true;
 133         }
 134
 135         /**
 136          * Is change selected.
 137          * @return
 138          */
 139         public boolean selected() {
 140                 return selected;
 141         }
 142
 143         /**
 144          * Has change been applied
 145          * @return
 146          */
 147         public boolean applied() {
 148                 return applied;
 149         }
 150
 151         /**
 152          * Is change visible
 153          * @return
 154          */
 155         public boolean isVisible() {
 156                 return visible;
 157         }
 158
 159         public void setVisible(boolean visible) {
 160                 this.visible = visible;
 161         }
 162
 163         /**
 164          * Is change enabled. Disabled changes do not allow changing selected state.
 165          * @return
 166          */
 167         public boolean enabled() {
 168         return enabled;
 169     }
 170
 171         public void setEnabled(boolean enabled) {
 172         this.enabled = enabled;
 173     }
 174
 175         @Override
 176         public String toString() {
 177                 String s = "PropertyChange";
 178                 if (pair.first != null)
 179                         s += " L(" + (leftSubject) + " , " + pair.first.getPredicate() + " , " + pair.first.getObject() + ")";
 180                 if (pair.second != null)
 181                         s += " R(" + (rightSubject) + " , " + pair.second.getPredicate() + " , " + pair.second.getObject() + ")";
 182                 if (selected)
 183                     s += " selected";
 184                 if (enabled)
 185                     s += " enabled";
 186                 if (visible)
 187             s += " visible";
 188                 if (applied)
 189                     s += " applied";
 190                 return s;
 191         }
 192
 193         public Object getCustomValue() {
 194                 return customValue;
 195         }
 196
 197         public void setCustomValue(Object customValue) {
 198                 this.customValue = customValue;
 199         }
 200
 201 }