PropertyChange class (instead of Pair)

[simantics/interop.git] / org.simantics.interop.update / src / org / simantics / interop / update / model / PropertyChange.java

diff --git a/org.simantics.interop.update/src/org/simantics/interop/update/model/PropertyChange.java b/org.simantics.interop.update/src/org/simantics/interop/update/model/PropertyChange.java
new file mode 100644 (file)
index 0000000..9867a39
--- /dev/null
+++ b/org.simantics.interop.update/src/org/simantics/interop/update/model/PropertyChange.java
@@ -0,0 +1,91 @@
+package org.simantics.interop.update.model;
+
+import org.simantics.db.Resource;
+import org.simantics.db.Statement;
+import org.simantics.db.WriteGraph;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.interop.test.GraphChanges;
+import org.simantics.utils.datastructures.Pair;
+
+public class PropertyChange {
+       protected GraphChanges changes;
+       protected Pair<Statement, Statement> pair;
+       protected boolean applied = false;
+       protected boolean selected = false;
+       
+       
+       public PropertyChange(GraphChanges changes, Statement first, Statement second) {
+               this.pair = new Pair<Statement, Statement>(first, second);
+               this.changes = changes;
+       }
+       
+       public PropertyChange(GraphChanges changes, Pair<Statement, Statement> change) {
+               this.pair = change;
+               this.changes = changes;
+       }
+       
+       public Statement getFirst() {
+               return pair.first;
+       }
+       
+       public Statement getSecond() {
+               return pair.second;
+       }
+       
+       public GraphChanges getChanges() {
+               return changes;
+       }
+       
+       @Override
+       public int hashCode() {
+               return pair.hashCode();
+       }
+       
+       @Override
+       public boolean equals(Object obj) {
+               if (obj == null)
+                       return false;
+               if (obj.getClass() != this.getClass())
+                       return false;
+               PropertyChange c = (PropertyChange)obj;
+               return pair.equals(c.pair);
+       }
+       
+       public void apply(WriteGraph graph) throws DatabaseException {
+               if (applied)
+                       return;
+               if (pair.second == null) {
+                       graph.deny(pair.first);
+                       return;
+               } 
+               Resource s = changes.getComparable().getLeft(pair.second.getSubject());
+               //Resource s = pair.first.getSubject();
+               Resource pred = pair.second.getPredicate();
+               if (graph.hasValue(pair.second.getObject())) {
+                       Object value = graph.getValue(pair.second.getObject());
+                       graph.claimLiteral(s, pred, value);
+               } else {
+                       graph.deny(s,pred);
+               }
+               applied = true;
+               
+       }
+       
+       public boolean select(boolean select) {
+               if (applied)
+                       return false;
+               this.selected = select;
+               return true;
+       }
+       
+       
+       public boolean selected() {
+               return selected;
+       }
+       
+       public boolean applied() {
+               return applied;
+       }
+       
+       
+}