From 2db59d0b99e6ca3bc9139b72fedfd9356be7e898 Mon Sep 17 00:00:00 2001
From: Florian Reimair <florian.reimair@iaik.tugraz.at>
Date: Tue, 5 May 2015 12:55:56 +0200
Subject: fixed NullPointerException in Logger class triggered by empty message

---
 .../java/at/gv/egovernment/moa/logging/Logger.java | 31 +++++++++++++++-------
 1 file changed, 22 insertions(+), 9 deletions(-)

(limited to 'common/src/main/java/at/gv/egovernment')

diff --git a/common/src/main/java/at/gv/egovernment/moa/logging/Logger.java b/common/src/main/java/at/gv/egovernment/moa/logging/Logger.java
index 265ad026d..7cb2e7daf 100644
--- a/common/src/main/java/at/gv/egovernment/moa/logging/Logger.java
+++ b/common/src/main/java/at/gv/egovernment/moa/logging/Logger.java
@@ -78,6 +78,19 @@ public class Logger {
       return logger;
   }
   
+  /**
+   * Prepare the message for printing it as string.
+   * <p>Mainly introduce because the <code>message</code> might be <code>null</code>. 
+   *
+   * @param message the message
+   * @return the string
+   */
+  private static String prepareMessage(Object message) {
+      if(null == message)
+          return "no message given";
+      return message.toString();
+  }
+  
   /**
    * Test, if the trace log level is enabled.
    * 
@@ -108,7 +121,7 @@ public class Logger {
    */
   public static void trace(Object message) {
 		org.slf4j.Logger logger = getLogger();
-		logger.trace(message.toString());
+		logger.trace(prepareMessage(message));
   }
   
   /**
@@ -141,17 +154,17 @@ public class Logger {
    */
   public static void debug(Object message) {
 		org.slf4j.Logger logger = getLogger();
-		logger.debug(message.toString());
+		logger.debug(prepareMessage(message));
   }
-  
-  /**
+
+/**
    * Log an info message.
    * 
    * @param message The message to log.
    */
   public static void info(Object message) {
 		org.slf4j.Logger logger = getLogger();
-		logger.info(message.toString());
+		logger.info(prepareMessage(message));
   }
   
   /**
@@ -161,7 +174,7 @@ public class Logger {
    */
   public static void warn(Object message) {
 		org.slf4j.Logger logger = getLogger();
-		logger.warn(message.toString());
+		logger.warn(prepareMessage(message));
   }
 
   /**
@@ -172,7 +185,7 @@ public class Logger {
    */
   public static void warn(Object message, Throwable t) {
 		org.slf4j.Logger logger = getLogger();
-		logger.warn(message.toString(), t);
+		logger.warn(prepareMessage(message), t);
   }
   
   /**
@@ -182,7 +195,7 @@ public class Logger {
    */
   public static void error(Object message) {
 		org.slf4j.Logger logger = getLogger();
-		logger.error(message.toString());
+		logger.error(prepareMessage(message));
   }
 
   /**
@@ -193,7 +206,7 @@ public class Logger {
    */
   public static void error(Object message, Throwable t) {
 		org.slf4j.Logger logger = getLogger();
-		logger.error(message.toString(), t);
+		logger.error(prepareMessage(message), t);
   }
   
   /**
-- 
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