dbaccess/source/core/inc/composertools.hxx

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  30
  31 #ifndef DBACCESS_SOURCE_CORE_INC_COMPOSERTOOLS_HXX
  32 #define DBACCESS_SOURCE_CORE_INC_COMPOSERTOOLS_HXX
  33
  34 /** === begin UNO includes === **/
  35 /** === end UNO includes === **/
  36
  37 #ifndef _RTL_USTRBUF_HXX_
  38 #include <rtl/ustrbuf.hxx>
  39 #endif
  40
  41 #include <functional>
  42
  43 //........................................................................
  44 namespace dbaccess
  45 {
  46 //........................................................................
  47
  48     //====================================================================
  49     //= TokenComposer
  50     //====================================================================
  51     struct TokenComposer : public ::std::unary_function< ::rtl::OUString, void >
  52     {
  53     private:
  54         #ifdef DBG_UTIL
  55         bool                    m_bUsed;
  56         #endif
  57
  58     protected:
  59         ::rtl::OUStringBuffer   m_aBuffer;
  60
  61     public:
  62         ::rtl::OUString getComposedAndClear()
  63         {
  64             #ifdef DBG_UTIL
  65             m_bUsed = true;
  66             #endif
  67             return m_aBuffer.makeStringAndClear();
  68         }
  69
  70         void clear()
  71         {
  72             #ifdef DBG_UTIL
  73             m_bUsed = false;
  74             #endif
  75             m_aBuffer.makeStringAndClear();
  76         }
  77
  78     public:
  79         TokenComposer()
  80         #ifdef DBG_UTIL
  81             :m_bUsed( false )
  82         #endif
  83         {
  84         }
  85
  86         virtual ~TokenComposer()
  87         {
  88         }
  89
  90         void operator() (const ::rtl::OUString& lhs)
  91         {
  92             append(lhs);
  93         }
  94
  95         void append( const ::rtl::OUString& lhs )
  96         {
  97             #ifdef DBG_UTIL
  98             OSL_ENSURE( !m_bUsed, "FilterCreator::append: already used up!" );
  99             #endif
 100             if ( lhs.getLength() )
 101             {
 102                 if ( m_aBuffer.getLength() )
 103                     appendNonEmptyToNonEmpty( lhs );
 104                 else
 105                     m_aBuffer.append( lhs );
 106             }
 107         }
 108
 109         /// append the given part. Only to be called when both the part and our buffer so far are not empty
 110         virtual void appendNonEmptyToNonEmpty( const ::rtl::OUString& lhs ) = 0;
 111     };
 112
 113     //====================================================================
 114     //= FilterCreator
 115     //====================================================================
 116     struct FilterCreator : public TokenComposer
 117     {
 118         virtual void appendNonEmptyToNonEmpty( const ::rtl::OUString& lhs )
 119         {
 120             m_aBuffer.insert( 0, (sal_Unicode)' ' );
 121             m_aBuffer.insert( 0, (sal_Unicode)'(' );
 122             m_aBuffer.appendAscii( " ) AND ( " );
 123             m_aBuffer.append( lhs );
 124             m_aBuffer.appendAscii( " )" );
 125         }
 126     };
 127
 128     //====================================================================
 129     //= FilterCreator
 130     //====================================================================
 131     struct OrderCreator : public TokenComposer
 132     {
 133         virtual void appendNonEmptyToNonEmpty( const ::rtl::OUString& lhs )
 134         {
 135             m_aBuffer.appendAscii( ", " );
 136             m_aBuffer.append( lhs );
 137         }
 138     };
 139
 140 //........................................................................
 141 } // namespace dbaccess
 142 //........................................................................
 143
 144 #endif // DBACCESS_SOURCE_CORE_INC_COMPOSERTOOLS_HXX
 145