fcomp.hxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
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 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */
#pragma once
 
#include <file/fcode.hxx>
#include <utility>
 
namespace connectivity
{
    class OSQLParseNode;
    namespace file
    {
        class OCode;
        class OOperand;
        class OSQLAnalyzer;
        typedef std::vector<std::unique_ptr<OCode>> OCodeList;
 
        class OPredicateCompiler final : public ::salhelper::SimpleReferenceObject
        {
            friend class OPredicateInterpreter;
            friend class OSQLAnalyzer;
 
            OCodeList                               m_aCodeList;
            css::uno::Reference< css::container::XNameAccess> m_orgColumns; // in filecurs this are the filecolumns
            OSQLAnalyzer*                           m_pAnalyzer;
            sal_Int32                               m_nParamCounter;
        public:
            OPredicateCompiler(OSQLAnalyzer* pAnalyzer);
 
            virtual ~OPredicateCompiler() override;
 
            void dispose();
 
            void start(connectivity::OSQLParseNode const * pSQLParseNode);
            OOperand* execute(connectivity::OSQLParseNode const * pPredicateNode);
 
            void Clean();
            bool isClean() const {return m_aCodeList.empty();}
            bool hasCode() const {return !isClean();}
            void  setOrigColumns(const css::uno::Reference< css::container::XNameAccess>& rCols) { m_orgColumns = rCols; }
            const css::uno::Reference< css::container::XNameAccess>& getOrigColumns() const { return m_orgColumns; }
        private:
            void execute_COMPARE(connectivity::OSQLParseNode const * pPredicateNode);
            void execute_LIKE(connectivity::OSQLParseNode const * pPredicateNode);
            void execute_BETWEEN(connectivity::OSQLParseNode const * pPredicateNode);
            void execute_ISNULL(connectivity::OSQLParseNode const * pPredicateNode);
            OOperand* execute_Operand(connectivity::OSQLParseNode const * pPredicateNode);
            void execute_Fold(OSQLParseNode const * pPredicateNode);
            void executeFunction(OSQLParseNode const * pPredicateNode);
        };
 
 
        class OPredicateInterpreter :
            public ::salhelper::SimpleReferenceObject
        {
            OCodeStack          m_aStack;
            ::rtl::Reference<OPredicateCompiler> m_rCompiler;
 
        public:
            OPredicateInterpreter(::rtl::Reference<OPredicateCompiler> xComp) : m_rCompiler(std::move(xComp)){}
            virtual ~OPredicateInterpreter() override;
 
            bool        evaluate(OCodeList& rCodeList);
            void        evaluateSelection(OCodeList& rCodeList, ORowSetValueDecoratorRef const & _rVal);
 
            bool start()
            {
                return evaluate(m_rCompiler->m_aCodeList);
            }
 
            void startSelection(ORowSetValueDecoratorRef const & _rVal)
            {
                evaluateSelection(m_rCompiler->m_aCodeList,_rVal);
            }
 
 
        };
    }
}
 
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