X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fdatamodel%2Ffeatures%2FRangeComparator.java;h=b7d702d5a3879c208274c09d96a0dfc81556a45a;hb=0dc22d603ad9d58a4ed951fc2146f7a027917a2c;hp=57e9b5ff396c648af1ad09381d38cc86274e1947;hpb=51728d3951398f9c12d7017c776953f17322cc68;p=jalview.git

diff --git a/src/jalview/datamodel/features/RangeComparator.java b/src/jalview/datamodel/features/RangeComparator.java
index 57e9b5f..b7d702d 100644
--- a/src/jalview/datamodel/features/RangeComparator.java
+++ b/src/jalview/datamodel/features/RangeComparator.java
@@ -1,18 +1,58 @@
+/*
+ * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
+ * Copyright (C) $$Year-Rel$$ The Jalview Authors
+ * 
+ * This file is part of Jalview.
+ * 
+ * Jalview is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License 
+ * as published by the Free Software Foundation, either version 3
+ * of the License, or (at your option) any later version.
+ *  
+ * Jalview is distributed in the hope that it will be useful, but 
+ * WITHOUT ANY WARRANTY; without even the implied warranty 
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
+ * PURPOSE.  See the GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with Jalview.  If not, see <http://www.gnu.org/licenses/>.
+ * The Jalview Authors are detailed in the 'AUTHORS' file.
+ */
 package jalview.datamodel.features;
 
+import jalview.datamodel.ContiguousI;
+
 import java.util.Comparator;
 
 /**
  * A comparator that orders ranges by either start position or end position
- * ascending. If the position matches,
+ * ascending. If the position matches, ordering is resolved by end position (or
+ * start position).
  * 
  * @author gmcarstairs
  *
  */
 public class RangeComparator implements Comparator<ContiguousI>
 {
+  public static final Comparator<ContiguousI> BY_START_POSITION = new RangeComparator(
+          true);
+
+  public static final Comparator<ContiguousI> BY_END_POSITION = new RangeComparator(
+          false);
+
   boolean byStart;
 
+  /**
+   * Constructor
+   * 
+   * @param byStartPosition
+   *          if true, order based on start position, if false by end position
+   */
+  RangeComparator(boolean byStartPosition)
+  {
+    byStart = byStartPosition;
+  }
+
   @Override
   public int compare(ContiguousI o1, ContiguousI o2)
   {
@@ -55,15 +95,4 @@ public class RangeComparator implements Comparator<ContiguousI>
     }
     return order;
   }
-
-  /**
-   * Constructor
-   * 
-   * @param byStartPosition
-   *          if true, order based on start position, if false by end position
-   */
-  public RangeComparator(boolean byStartPosition)
-  {
-    byStart = byStartPosition;
-  }
 }