JAL-2291 SequenceI.getInsertionsAsBits for convenient logical operations

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

diff --git a/src/jalview/datamodel/Sequence.java b/src/jalview/datamodel/Sequence.java
index b0faf21..a8cff26 100755 (executable)
--- a/src/jalview/datamodel/Sequence.java
+++ b/src/jalview/datamodel/Sequence.java
@@ -29,6 +29,7 @@ import jalview.util.StringUtils;
 
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.BitSet;
 import java.util.Collections;
 import java.util.Enumeration;
 import java.util.List;
@@ -819,6 +820,40 @@ public class Sequence extends ASequence implements SequenceI
   }
 
   @Override
+  public BitSet getInsertionsAsBits()
+  {
+    BitSet map = new BitSet();
+    int lastj = -1, j = 0;
+    int pos = start;
+    int seqlen = sequence.length;
+    while ((j < seqlen))
+    {
+      if (jalview.util.Comparison.isGap(sequence[j]))
+      {
+        if (lastj == -1)
+        {
+          lastj = j;
+        }
+      }
+      else
+      {
+        if (lastj != -1)
+        {
+          map.set(lastj, j - 1);
+          lastj = -1;
+        }
+      }
+      j++;
+    }
+    if (lastj != -1)
+    {
+      map.set(lastj, j - 1);
+      lastj = -1;
+    }
+    return map;
+  }
+
+  @Override
   public void deleteChars(int i, int j)
   {
     int newstart = start, newend = end;