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diff --git a/catalogmgr/algebraops.hh b/catalogmgr/algebraops.hh
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+/*
+* 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:
+ *
+ ************************************************************/
+
+#ifndef _ALGEBRAOPS_HH_
+#define _ALGEBRAOPS_HH__
+
+#include "ops.hh"
+
+#include <vector>
+#include <string>
+
+// forward declarations
+class QtOperation;
+class QtData;
+
+//@ManMemo: Module: {\bf catalogif}
+
+/*@Doc:
+ 
+  Operation object for marray contstructor of the query language.
+
+*/
+
+class QLMarrayOp: public MarrayOp
+{
+  public:
+    /// constructor
+    QLMarrayOp( QtOperation* newCellExpression, std::vector<QtData*>* newDataList,
+                std::string       &newIteratorName,
+                BaseType*    newResType,        unsigned int newResOff = 0    );
+    /**
+      Constructor gets cell expression pointer, data vector for bounded variables,
+      cell type, and type offset
+    */
+
+    /// virtual destructor
+    virtual ~QLMarrayOp();
+
+    /// operator that carries out the cell expression on point {\tt p}.
+    virtual void operator() ( char* result, const r_Point& p );
+
+  private:
+    /// pointer to the cell expression
+    QtOperation* cellExpression;
+
+    /// pointer to data vector
+    std::vector<QtData*>* dataList;
+
+    /// name of the iterator
+    std::string iteratorName;
+};
+
+
+
+
+//@ManMemo: Module: {\bf catalogif}
+
+/*@Doc:
+ 
+  Operation object for condenser operation of the query language.
+
+*/
+
+class QLCondenseOp: public GenCondenseOp
+{
+  public:
+    /// constructor
+    QLCondenseOp( QtOperation*     newCellExpression,
+                  QtOperation*     newCondExpression,
+                  std::vector<QtData*>* newDataList,
+                  std::string           &newIteratorName,
+                  BaseType*        newResType,
+	          unsigned int     newResOff,
+                  BinaryOp*        newAccuOp,
+                  char*            newInitVal = 0 );
+    /**
+      Constructor gets cell expression pointer, cell condition expression pointer, 
+      data vector for bounded variables, cell type, and type offset
+    */
+
+    /// virtual destructor
+    virtual ~QLCondenseOp();
+
+    /// operator that carries out the cell expression on point {\tt p}.
+    virtual void operator() ( const r_Point& p );
+
+  private:
+    /// pointer to the cell expression
+    QtOperation* cellExpression;
+
+    /// pointer to the condition expression
+    QtOperation* condExpression;
+
+    /// pointer to data vector
+    std::vector<QtData*>* dataList;
+
+    /// name of the iterator
+    std::string iteratorName;
+};
+
+#endif
+