X-Git-Url: http://jaekl.net/gitweb/?a=blobdiff_plain;f=prod%2Fnet%2Fjaekl%2Fcfb%2Futil%2FUtil.java;h=309e20dde6e74fd672074cde15ad87aa041a6803;hb=769f0f2e9b90516e68246b551a4c68f953018c72;hp=c0e7b1ca4b592ee9c2decc8e168fe3994ba3ec00;hpb=08a530ef53cc4756f5e632b69c78830872ebd9f4;p=cfb.git

diff --git a/prod/net/jaekl/cfb/util/Util.java b/prod/net/jaekl/cfb/util/Util.java
index c0e7b1c..309e20d 100644
--- 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();
+	}
 }