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                 if (!leftSubject.equals(c.leftSubject))
  85                         return false;
  86                 if (!rightSubject.equals(c.rightSubject))
  87                         return false;
  88                 if (pair.first != null && pair.first.equals(c.pair.first))
  89                         return true;
  90                 if (pair.second != null && pair.second.equals(c.pair.second))
  91                         return true;
  92                 return false;
  93         }
  94
  95         public void apply(WriteGraph graph) throws DatabaseException {
  96                 if (applied)
  97                         return;
  98                 if (pair.second == null) {
  99                         graph.deny(leftSubject, pair.first.getPredicate(),pair.first.getObject());
 100                         return;
 101                 }
 102                 Layer0 L0 = Layer0.getInstance(graph);
 103                 Resource s = leftSubject;
 104                 if (graph.isInstanceOf(pair.second.getObject(), L0.Literal)) {
 105                         Object value = null;
 106                         if (customValue != null)
 107                                 value = customValue;
 108                         else if (graph.hasValue(pair.second.getObject())) {
 109                                 value = graph.getValue(pair.second.getObject());
 110                         }
 111                         Resource pred = pair.second.getPredicate();
 112                         if (getChanges().getComparable().containsRight(pred))
 113                                 pred = getChanges().getComparable().getLeft(pred);
 114
 115                         if (value != null) {
 116                                 graph.deny(s, pred);
 117                                 graph.claimLiteral(s, pred, value);
 118                         } else {
 119                                 graph.deny(s,pred);
 120                         }
 121                 } else if (graph.isInstanceOf(pair.second.getObject(), L0.SCLValue)) {
 122                         Resource pred = pair.second.getPredicate();
 123                         graph.deny(s, pred);
 124                         Resource valueResource = graph.newResource();
 125                         graph.claim(valueResource, L0.InstanceOf, graph.getSingleObject(pair.second.getObject(), L0.InstanceOf));
 126                         AddDeleteUpdateOp.copyProperties(graph, pair.second.getObject(), valueResource);
 127                         graph.claim(s, pred, valueResource);
 128                 }
 129                 applied = true;
 130         }
 131
 132         /**
 133          * Sets selected state.
 134          * @param select
 135          * @return true if selection state was changed
 136          */
 137         public boolean select(boolean select) {
 138             if (!enabled)
 139                 return false;
 140                 if (applied)
 141                         return false;
 142                 this.selected = select;
 143                 return true;
 144         }
 145
 146         /**
 147          * Is change selected.
 148          * @return
 149          */
 150         public boolean selected() {
 151                 return selected;
 152         }
 153
 154         /**
 155          * Has change been applied
 156          * @return
 157          */
 158         public boolean applied() {
 159                 return applied;
 160         }
 161
 162         /**
 163          * Is change visible
 164          * @return
 165          */
 166         public boolean isVisible() {
 167                 return visible;
 168         }
 169
 170         public void setVisible(boolean visible) {
 171                 this.visible = visible;
 172         }
 173
 174         /**
 175          * Is change enabled. Disabled changes do not allow changing selected state.
 176          * @return
 177          */
 178         public boolean enabled() {
 179         return enabled;
 180     }
 181
 182         public void setEnabled(boolean enabled) {
 183         this.enabled = enabled;
 184     }
 185
 186         @Override
 187         public String toString() {
 188                 String s = "PropertyChange";
 189                 if (pair.first != null)
 190                         s += " L(" + (leftSubject) + " , " + pair.first.getPredicate() + " , " + pair.first.getObject() + ")";
 191                 if (pair.second != null)
 192                         s += " R(" + (rightSubject) + " , " + pair.second.getPredicate() + " , " + pair.second.getObject() + ")";
 193                 if (selected)
 194                     s += " selected";
 195                 if (enabled)
 196                     s += " enabled";
 197                 if (visible)
 198             s += " visible";
 199                 if (applied)
 200                     s += " applied";
 201                 return s;
 202         }
 203
 204         public Object getCustomValue() {
 205                 return customValue;
 206         }
 207
 208         public void setCustomValue(Object customValue) {
 209                 if (applied) {
 210                         throw new RuntimeException("Cannot change already applied value");
 211                 }
 212                 this.customValue = customValue;
 213         }
 214
 215 }