JAL-845 code/refactoring/tests related to linking DNA and protein

[jalview.git] / src / jalview / analysis / AlignSeq.java

diff --git a/src/jalview/analysis/AlignSeq.java b/src/jalview/analysis/AlignSeq.java
index 307a06f..ab03668 100755 (executable)
--- a/src/jalview/analysis/AlignSeq.java
+++ b/src/jalview/analysis/AlignSeq.java
@@ -804,19 +804,23 @@ public class AlignSeq
   }
 
   /**
-   * DOCUMENT ME!
+   * Returns the given sequence with all of the given gap characters removed.
    * 
-   * @param gapChar
-   *          DOCUMENT ME!
+   * @param gapChars
+   *          a string of characters to be treated as gaps
    * @param seq
-   *          DOCUMENT ME!
+   *          the input sequence
    * 
-   * @return DOCUMENT ME!
+   * @return
    */
-  public static String extractGaps(String gapChar, String seq)
+  public static String extractGaps(String gapChars, String seq)
   {
-    StringTokenizer str = new StringTokenizer(seq, gapChar);
-    StringBuffer newString = new StringBuffer();
+    if (gapChars == null || seq == null)
+    {
+      return null;
+    }
+    StringTokenizer str = new StringTokenizer(seq, gapChars);
+    StringBuilder newString = new StringBuilder(seq.length());
 
     while (str.hasMoreTokens())
     {
@@ -1153,7 +1157,7 @@ public class AlignSeq
               ap++;
             }
           }
-          if (sq.getAnnotation() != null)
+          if (sq.getAnnotation() != null && sq.getAnnotation().length > 0)
           {
             annotations.addAll(inspos, Arrays.asList(sq.getAnnotation()));
           }