Initial commitv8.0

1 files changed, 120 insertions, 0 deletions

diff --git a/qlparser/qtoperation.hh b/qlparser/qtoperation.hh
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+++ b/qlparser/qtoperation.hh
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+#ifndef _QTOPERATION_
+#define _QTOPERATION_
+
+#ifndef CPPSTDLIB
+#include <ospace/string.h> // STL<ToolKit>
+#else
+#include <string>
+#endif
+
+#include "qlparser/qtnode.hh"
+
+class QtData;  // forward declaration of a subclass of QtOperation
+
+#include <iostream>
+
+/*
+* 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:
+
+QtOperation defines a method {\tt evaluate()} getting a tupel of {\tt QtData} and returning
+a {\tt QtData} element. Every subclass has to redefine this method to compute its specific
+operation. Therefore, it takes its inputs which are also of type {\tt QtOperation}, and
+invokes the {\tt evaluate()} method again. The results are used as operands and the
+computed value is returned.
+
+*/
+
+class QtOperation : public QtNode
+{
+  public:
+    /// default constructor
+    QtOperation();
+
+    /// constructor getting a pointer to the parent
+    QtOperation( QtNode* parent );
+
+    ///for associative law
+    virtual QtOperation* getUniqueOrder( const QtNode::QtNodeType ID );
+
+    /**
+      The method gives back a node that has the same QtNodeType and has the lowest
+      Spelling of all nodes in the subtree with the same QtNodeType.
+    */
+
+    /// method for evaluating the node
+    virtual QtData* evaluate( QtDataList* inputList );
+
+    /**
+      The method takes the {\tt inputList} to compute the result of the node which is returned in the end.
+      The semantics is that elements of the {\tt inputList} are not allowed to be used as a result because
+      the {\tt inputList} is freed by the caller. If this is needed, they have to be copied.
+    */
+
+    /// optimizing load access
+    virtual void optimizeLoad( QtTrimList* trimList );
+
+    /// type checking of the subtree
+    virtual const QtTypeElement& checkType( QtTypeTuple* typeTuple = NULL );
+    /**
+      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 QtTypeElement& type );
+      ///
+      inline const QtTypeElement& getDataStreamType() const;
+    ///
+    //@}
+
+    void printTree( int tab, std::ostream& s, QtChildType mode=QT_ALL_NODES );
+    
+    void printAlgebraicExpression( std::ostream& s );
+
+  protected:
+    /// result type of the node
+    QtTypeElement dataStreamType;
+
+  private:
+	/// atribute for indetification of nodes
+	static const QtNodeType nodeType;	
+};
+
+#include "qlparser/qtoperation.icc"
+
+#endif
+
+