Adopt spreadsheet changes made in Balas development

[simantics/platform.git] / bundles / org.simantics.spreadsheet / src / org / simantics / spreadsheet / solver / ExternalRefConstant.java

diff --git a/bundles/org.simantics.spreadsheet/src/org/simantics/spreadsheet/solver/ExternalRefConstant.java b/bundles/org.simantics.spreadsheet/src/org/simantics/spreadsheet/solver/ExternalRefConstant.java
new file mode 100644 (file)
index 0000000..2793269
--- /dev/null
+++ b/bundles/org.simantics.spreadsheet/src/org/simantics/spreadsheet/solver/ExternalRefConstant.java
@@ -0,0 +1,24 @@
+package org.simantics.spreadsheet.solver;
+
+import org.simantics.databoard.binding.mutable.Variant;
+import org.simantics.spreadsheet.ExternalRef;
+
+public class ExternalRefConstant implements ExternalRef {
+
+    final private Variant constant;
+    
+    public ExternalRefConstant(Variant constant) {
+        this.constant = constant;
+    }
+    
+    @Override
+    public void listen(Object context, ExternalRefListener listener) {
+        listener.newValue(constant);
+    }
+    
+    @Override
+    public void modify(Object context, Variant newValue) {
+    }
+    
+}
+