add: method getMethodOnStack()

SVN: 536

common/source/java/ch/systemsx/cisd/common/utilities/ClassUtils.java

@@ -74,13 +74,28 @@ public final class ClassUtils
      * Returns <code>null</code> if none could be found.
      * </p>
      */
+    public final static Method getCurrentMethod()
+    {
+        return getMethodOnStack(2);
+    }
+    
+    /**
+     * Returns the <code>Method</code> on the stack of <var>level</var>.
+     * <p>
+     * <code>level=0</code> is this method itself, <code>level=1</code> is the method that called it and so forth.
+     * @return <code>null</code> if none could be found.
+     * </p>
+     */
     // TODO 2007-06-14 Christian Ribeaud: 'method.getName()' is not specific enough. You have to used kind of
     // or part of 'Method.toGenericString()'.
-    public final static Method getCurrentMethod()
+    public final static Method getMethodOnStack(int level)
     {
         StackTraceElement[] elements = new Throwable().getStackTrace();
-        // Index 0 is *this* method
-        StackTraceElement element = elements[1];
+        if (elements.length <= level)
+        {
+            return null;
+        }
+        StackTraceElement element = elements[level];
         String methodName = element.getMethodName();
         try
         {