1 files changed, 102 insertions, 0 deletions
diff --git a/qlparser/qtoncstream.hh b/qlparser/qtoncstream.hh
new file mode 100644
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--- /dev/null
+++ b/qlparser/qtoncstream.hh
@@ -0,0 +1,102 @@
+#ifndef _QTONCSTREAM_
+#define _QTONCSTREAM_
+
+#ifndef CPPSTDLIB
+#include <ospace/string.h> // STL<ToolKit>
+#else
+#include <string>
+#endif
+
+#include "qlparser/qtnode.hh"
+
+/*
+* This file is part of rasdaman community.
+*
+* Rasdaman community 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 3 of the License, or
+* (at your option) any later version.
+*
+* Rasdaman community is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with rasdaman community.  If not, see <http://www.gnu.org/licenses/>.
+*
+* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann /
+rasdaman GmbH.
+*
+* For more information please see <http://www.rasdaman.org>
+* or contact Peter Baumann via <baumann@rasdaman.com>.
+*/
+/************************************************************
+ *
+ *
+ * COMMENTS:
+ *
+ ************************************************************/
+
+
+//@ManMemo: Module: {\bf qlparser}
+
+/*@Doc:
+
+This class is super class for every class supporting the ONC protocol
+which means that, first, a stream has to be opened with open(),
+then the elements are received through invoking next(),
+and at the end, the stream is closed with the close() method. The
+next() method returns a tupel of QtData or any subclass of QtData.
+
+*/
+
+class QtONCStream : public QtNode
+{
+  public:
+    /// default constructor
+    QtONCStream();
+
+    /// constructor getting a pointer to the parent
+    QtONCStream( QtNode* node );
+
+    //@Man: Operations of the ONC protocol
+    //@{
+    ///
+    virtual void        open()=0;
+    ///
+    virtual QtDataList* next()=0;
+    ///
+    virtual void        close()=0;
+    ///
+    virtual void        reset()=0;
+    //@}
+
+    /// type checking of the subtree
+    virtual const QtTypeTuple& checkType() = 0;
+    /**
+      The method triggers type checking of the node's subtree. If an error occurs, an exception
+      is raised. 
+    */
+
+    //@Man: Read/Write methods
+    //@{
+    ///
+      /// 
+      inline void               setDataStreamType( const QtTypeTuple& type );
+      ///
+      inline const QtTypeTuple& getDataStreamType() const;
+    ///
+    //@}
+
+  protected:
+    /// result type of the node
+    QtTypeTuple dataStreamType;
+
+  private:
+	/// atribute for identification of nodes
+	static const QtNodeType nodeType;	
+};
+
+#endif
+