JAL-2110 JAL-2131 JAL-1765 remove reference to jalview.datamodel.Alignment from Align...

[jalview.git] / src / jalview / datamodel / Alignment.java

diff --git a/src/jalview/datamodel/Alignment.java b/src/jalview/datamodel/Alignment.java
index ed1c92e..34f8f6e 100755 (executable)
--- a/src/jalview/datamodel/Alignment.java
+++ b/src/jalview/datamodel/Alignment.java
@@ -45,7 +45,7 @@ import java.util.Vector;
  */
 public class Alignment implements AlignmentI
 {
-  protected Alignment dataset;
+  private Alignment dataset;
 
   protected List<SequenceI> sequences;
 
@@ -987,7 +987,7 @@ public class Alignment implements AlignmentI
   }
 
   @Override
-  public void setDataset(Alignment data)
+  public void setDataset(AlignmentI data)
   {
     if (dataset == null && data == null)
     {
@@ -995,7 +995,12 @@ public class Alignment implements AlignmentI
     }
     else if (dataset == null && data != null)
     {
-      dataset = data;
+      if (!(data instanceof Alignment))
+      {
+        throw new Error(
+                "Implementation Error: jalview.datamodel.Alignment does not yet support other implementations of AlignmentI as its dataset reference");
+      }
+      dataset = (Alignment) data;
       for (int i = 0; i < getHeight(); i++)
       {
         SequenceI currentSeq = getSequenceAt(i);