X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Futil%2FRangeComparator.java;fp=src%2Fjalview%2Futil%2FRangeComparator.java;h=f911a9b688ff9da780f8eb1d8a4620082c6465f3;hb=d5bcc3830eab04e6db816e1c2ad8fce1dc189612;hp=0000000000000000000000000000000000000000;hpb=3ebdd4e28382e38a181aae1eed71549f603f9025;p=jalview.git

diff --git a/src/jalview/util/RangeComparator.java b/src/jalview/util/RangeComparator.java
new file mode 100644
index 0000000..f911a9b
--- /dev/null
+++ b/src/jalview/util/RangeComparator.java
@@ -0,0 +1,25 @@
+package jalview.util;
+
+import java.util.Comparator;
+
+/**
+ * A comparator to order [from, to] ranges into ascending or descending order of
+ * their start position
+ */
+public class RangeComparator implements Comparator<int[]>
+{
+  boolean forwards;
+
+  public RangeComparator(boolean forward)
+  {
+    forwards = forward;
+  }
+
+  @Override
+  public int compare(int[] o1, int[] o2)
+  {
+    int compared = Integer.compare(o1[0], o2[0]);
+    return forwards ? compared : -compared;
+  }
+
+}
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