diff -N LCWarning.h
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ LCWarning.h	17 Jun 2010 13:16:44 -0000	1.1
@@ -0,0 +1,58 @@

+// -*- C++ -*-
+#ifndef UTIL_LCWARNING_H
+#define UTIL_LCWARNING_H 1
+
+#include<map>
+#include<string>
+#include<iostream>
+
+namespace UTIL {
+
+/** Utility class to show warnings in LCIO.
+ *  
+ *  The maximum amount of warnings printed is configurable and per default set to 10.
+ *
+ *  Warnings are shown one last time when application ends.
+ *
+ * @author engels
+ * @version
+ */
+class LCWarning {
+public: 
+
+    static LCWarning& getInstance(); // singleton class
+
+    /** register a new warning
+     *
+     *  id = "a_unique_string_to_identify_the_warning"
+     *  txt = "the world will end tomorrow, leave the room immediately and go get some fun ;)"
+     *  max = the maximum amount of times to display the warning
+     */
+    void registerWarning( const std::string id, const std::string txt, int max=10 ) ;
+
+    /** print the warning text associated to the given id */
+    void printWarning( const std::string id ) ;
+
+private:
+    // singleton settings
+    LCWarning( std::ostream& outstream=std::cerr );
+    ~LCWarning(); //{}
+    LCWarning( const LCWarning& ) ;
+    LCWarning & operator=(const LCWarning &);
+    static LCWarning& instance ;
+
+
+    struct _warning_cfg_struct{
+        std::string txt;
+        int max;
+        int counter;
+    };
+
+    std::map< std::string, _warning_cfg_struct > _warning_cfg ; // warning configurations
+    std::map< std::string, _warning_cfg_struct > :: iterator _warning_cfg_it ; // iterator
+    std::ostream& _outstream ; // where warnings get printed
+
+}; // class
+
+} // namespace UTIL
+#endif /* ifndef UTIL_LCWARNING_H */