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diff --git a/kpovmodeler/pmserializer.h b/kpovmodeler/pmserializer.h
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+//-*-C++-*-
+/*
+**************************************************************************
+                                 description
+                             --------------------
+    copyright            : (C) 2003 by Andreas Zehender
+    email                : zehender@kde.org
+**************************************************************************
+
+**************************************************************************
+*                                                                        *
+*  This program is free software; you can redistribute it and/or modify  *
+*  it under the terms of the GNU General Public License as published by  *
+*  the Free Software Foundation; either version 2 of the License, or     *
+*  (at your option) any later version.                                   *
+*                                                                        *
+**************************************************************************/
+
+#ifndef PMSERIALIZER_H
+#define PMSERIALIZER_H
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+class QIODevice;
+
+#include "pmobject.h"
+#include "pmerrordialog.h"
+
+#include <qdict.h>
+
+
+/**
+ * Class to serialize an object or a list of objects.
+ *
+ * Normally you don't have to create instances of this type or subclasses,
+ * the class @ref PMIOFormat has factory methods to create them.
+ *
+ * There is one sub class for each format.
+ *
+ * During serialization, errors can occur. These are returned
+ * by the method @ref errors.
+ */
+class PMSerializer
+{
+public:
+   /**
+    * Default constructor
+    *
+    * The serialized data will be written to the io device
+    */
+   PMSerializer( QIODevice* dev );
+   /**
+    * Destructor
+    */
+   virtual ~PMSerializer( );
+   /**
+    * Returns the translated description of the format. Should return
+    * the same string as description( ) of the corresponding
+    * IO format.
+    */
+   virtual QString description( ) const = 0;
+
+   /**
+    * Serializes one object to the device
+    */
+   virtual void serialize( PMObject* o ) = 0;
+   /**
+    * Serializes a list of objects. The default
+    * implementation will call serialize( PMObject* ) for each object.
+    */
+   virtual void serializeList( const PMObjectList& objects );
+   /**
+    * Closes the serializer
+    */
+   virtual void close( ) = 0;
+
+   /**
+    * Returns the messages of the serializer
+    */
+   PMMessageList messages( ) const { return m_messages; }
+   /**
+    * Returns true if there were errors during serializing
+    */
+   bool errors( ) const { return m_errors > 0; }
+   /**
+    * Returns true if there were warnings during serializing
+    */
+   bool warnings( ) const { return m_warnings > 0; }
+   /**
+    * Returns true, if a fatal error occurred
+    * and it doesn't make sense to continue
+    */
+   bool fatal( ) const { return m_bFatalError; }
+   /**
+    * Returns a bitwise combination of @ref PMErrorFlags constants
+    */
+   int errorFlags( ) const;
+
+   /**
+    * Adds an error to the message string
+    */
+   void printError( const QString& msg );
+   /**
+    * Adds a warning to the message string
+    */
+   void printWarning( const QString& msg );
+   /**
+    * Adds an info to the message string
+    */
+   void printInfo( const QString& msg );
+   /**
+    * Adds the message to the message string. Type is "error", "warning",
+    * "info"
+    */
+   void printMessage( const QString& type, const QString& msg );
+
+   /**
+    * Sets the fatal error flag
+    */
+   void setFatalError( ) { m_bFatalError = true; }
+
+   /**
+    * returns the maximum number of errors
+    */
+   static unsigned maxErrors( ) { return s_maxErrors; }
+   /**
+    * sets the maximum number of errors to m
+    */
+   static void setMaxErrors( unsigned m ) { s_maxErrors = m; }
+   /**
+    * returns the maximum number of warnings
+    */
+   static unsigned maxWarnings( ) { return s_maxWarnings; }
+   /**
+    * sets the maximum number of warnings to m
+    */
+   static void setMaxWarnings( unsigned m ) { s_maxWarnings = m; }
+
+protected:
+   /**
+    * The assigned IO device for serialization
+    */
+   QIODevice* m_pDev;
+
+private:
+   /**
+    * The serializer output (errors, warnings...)
+    */
+   PMMessageList m_messages;
+   /**
+    * A dictionary object -> message
+    */
+   QPtrDict< QPtrList<PMMessage> > m_messageDict;
+   /**
+    * Number of warnings during parsing
+    */
+   unsigned int m_warnings;
+   /**
+    * Number of errors during parsing
+    */
+   unsigned int m_errors;
+   /**
+    * Flag for fatal errors
+    */
+   bool m_bFatalError;
+
+   /**
+    * maximum number of errors
+    */
+   static unsigned int s_maxErrors;
+   /**
+    * maximum number of warnings
+    */
+   static unsigned int s_maxWarnings;
+};
+
+#endif