Add computation of deltas (differences between Analysis runs).

[cfb.git] / prod / net / jaekl / cfb / util / Util.java

diff --git a/prod/net/jaekl/cfb/util/Util.java b/prod/net/jaekl/cfb/util/Util.java
index c0e7b1ca4b592ee9c2decc8e168fe3994ba3ec00..309e20dde6e74fd672074cde15ad87aa041a6803 100644 (file)
--- a/prod/net/jaekl/cfb/util/Util.java
+++ b/prod/net/jaekl/cfb/util/Util.java
@@ -1,13 +1,37 @@
 package net.jaekl.cfb.util;
 
+// Copyright (C) 2015 Christian Jaekl
+
 import java.io.PrintWriter;
 import java.io.StringWriter;
 
 public class Util {
-       public static String stringify(Throwable thr) {
+       public static String stringify(Throwable thr) 
+       {
                StringWriter sw = new StringWriter();
                PrintWriter pw = new PrintWriter(sw);
                thr.printStackTrace(pw);
                return sw.toString();
        }
+       
+       // Test for equality, while taking care to avoid 
+       // dereferencing a null pointer.
+       // Note that two null pointers are considered equal.
+       public static boolean objsAreEqual(Object a, Object b) 
+       {
+               if ((null == a) || (null == b)) {
+                       return (a == b);
+               }
+               
+               return a.equals(b);
+       }
+       
+       // Return 1 if obj is null, or obj.hashCode() otherwise
+       public static int objHashCode(Object obj)
+       {
+               if (null == obj) {
+                       return 1;
+               }
+               return obj.hashCode();
+       }
 }