121 lines
3.3 KiB
C++
121 lines
3.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#pragma once
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#include <rtl/ustrbuf.hxx>
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#include <osl/diagnose.h>
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namespace dbaccess
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{
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// TokenComposer
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struct TokenComposer
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{
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private:
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#ifdef DBG_UTIL
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bool m_bUsed;
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#endif
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protected:
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OUStringBuffer m_aBuffer;
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public:
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OUString getComposedAndClear()
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{
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#ifdef DBG_UTIL
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m_bUsed = true;
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#endif
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return m_aBuffer.makeStringAndClear();
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}
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void clear()
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{
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#ifdef DBG_UTIL
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m_bUsed = false;
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#endif
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m_aBuffer.setLength(0);
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}
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public:
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TokenComposer()
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#ifdef DBG_UTIL
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:m_bUsed( false )
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#endif
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{
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}
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virtual ~TokenComposer()
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{
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}
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TokenComposer(TokenComposer const &) = default;
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TokenComposer(TokenComposer &&) = default;
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TokenComposer & operator =(TokenComposer const &) = default;
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TokenComposer & operator =(TokenComposer &&) = default;
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void operator() (const OUString& lhs)
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{
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append(lhs);
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}
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void append( const OUString& lhs )
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{
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#ifdef DBG_UTIL
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OSL_ENSURE( !m_bUsed, "FilterCreator::append: already used up!" );
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#endif
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if ( !lhs.isEmpty() )
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{
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if ( !m_aBuffer.isEmpty() )
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appendNonEmptyToNonEmpty( lhs );
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else
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m_aBuffer.append( lhs );
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}
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}
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/// append the given part. Only to be called when both the part and our buffer so far are not empty
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virtual void appendNonEmptyToNonEmpty( const OUString& lhs ) = 0;
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};
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// FilterCreator
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struct FilterCreator : public TokenComposer
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{
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virtual void appendNonEmptyToNonEmpty( const OUString& lhs ) override
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{
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m_aBuffer.insert( 0, ' ' );
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m_aBuffer.insert( 0, '(' );
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m_aBuffer.append( " ) AND ( " );
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m_aBuffer.append( lhs );
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m_aBuffer.append( " )" );
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}
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};
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// FilterCreator
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struct OrderCreator : public TokenComposer
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{
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virtual void appendNonEmptyToNonEmpty( const OUString& lhs ) override
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{
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m_aBuffer.append( ", " );
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m_aBuffer.append( lhs );
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}
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};
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} // namespace dbaccess
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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