dbaccess/source/core/inc/composertools.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #ifndef INCLUDED_DBACCESS_SOURCE_CORE_INC_COMPOSERTOOLS_HXX
  21 #define INCLUDED_DBACCESS_SOURCE_CORE_INC_COMPOSERTOOLS_HXX
  22
  23 #include <rtl/ustrbuf.hxx>
  24 #include <osl/diagnose.h>
  25
  26 #include <functional>
  27
  28 namespace dbaccess
  29 {
  30
  31     // TokenComposer
  32     struct TokenComposer : public ::std::unary_function< OUString, void >
  33     {
  34     private:
  35         #ifdef DBG_UTIL
  36         bool                    m_bUsed;
  37         #endif
  38
  39     protected:
  40         OUStringBuffer   m_aBuffer;
  41
  42     public:
  43         OUString getComposedAndClear()
  44         {
  45             #ifdef DBG_UTIL
  46             m_bUsed = true;
  47             #endif
  48             return m_aBuffer.makeStringAndClear();
  49         }
  50
  51         void clear()
  52         {
  53             #ifdef DBG_UTIL
  54             m_bUsed = false;
  55             #endif
  56             m_aBuffer.makeStringAndClear();
  57         }
  58
  59     public:
  60         TokenComposer()
  61         #ifdef DBG_UTIL
  62             :m_bUsed( false )
  63         #endif
  64         {
  65         }
  66
  67         virtual ~TokenComposer()
  68         {
  69         }
  70
  71         void operator() (const OUString& lhs)
  72         {
  73             append(lhs);
  74         }
  75
  76         void append( const OUString& lhs )
  77         {
  78             #ifdef DBG_UTIL
  79             OSL_ENSURE( !m_bUsed, "FilterCreator::append: already used up!" );
  80             #endif
  81             if ( !lhs.isEmpty() )
  82             {
  83                 if ( !m_aBuffer.isEmpty() )
  84                     appendNonEmptyToNonEmpty( lhs );
  85                 else
  86                     m_aBuffer.append( lhs );
  87             }
  88         }
  89
  90         /// append the given part. Only to be called when both the part and our buffer so far are not empty
  91         virtual void appendNonEmptyToNonEmpty( const OUString& lhs ) = 0;
  92     };
  93
  94     // FilterCreator
  95     struct FilterCreator : public TokenComposer
  96     {
  97         virtual void appendNonEmptyToNonEmpty( const OUString& lhs ) SAL_OVERRIDE
  98         {
  99             m_aBuffer.insert( 0, (sal_Unicode)' ' );
 100             m_aBuffer.insert( 0, (sal_Unicode)'(' );
 101             m_aBuffer.appendAscii( " ) AND ( " );
 102             m_aBuffer.append( lhs );
 103             m_aBuffer.appendAscii( " )" );
 104         }
 105     };
 106
 107     // FilterCreator
 108     struct OrderCreator : public TokenComposer
 109     {
 110         virtual void appendNonEmptyToNonEmpty( const OUString& lhs ) SAL_OVERRIDE
 111         {
 112             m_aBuffer.appendAscii( ", " );
 113             m_aBuffer.append( lhs );
 114         }
 115     };
 116
 117 } // namespace dbaccess
 118
 119 #endif // INCLUDED_DBACCESS_SOURCE_CORE_INC_COMPOSERTOOLS_HXX
 120
 121 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */