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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
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 DBACCESS_SOURCE_CORE_INC_COMPOSERTOOLS_HXX
21 : #define DBACCESS_SOURCE_CORE_INC_COMPOSERTOOLS_HXX
22 :
23 :
24 : #include <rtl/ustrbuf.hxx>
25 :
26 : #include <functional>
27 :
28 : namespace dbaccess
29 : {
30 :
31 : //====================================================================
32 : //= TokenComposer
33 : //====================================================================
34 0 : struct TokenComposer : public ::std::unary_function< ::rtl::OUString, void >
35 : {
36 : private:
37 : #ifdef DBG_UTIL
38 : bool m_bUsed;
39 : #endif
40 :
41 : protected:
42 : ::rtl::OUStringBuffer m_aBuffer;
43 :
44 : public:
45 0 : ::rtl::OUString getComposedAndClear()
46 : {
47 : #ifdef DBG_UTIL
48 : m_bUsed = true;
49 : #endif
50 0 : return m_aBuffer.makeStringAndClear();
51 : }
52 :
53 0 : void clear()
54 : {
55 : #ifdef DBG_UTIL
56 : m_bUsed = false;
57 : #endif
58 0 : m_aBuffer.makeStringAndClear();
59 0 : }
60 :
61 : public:
62 0 : TokenComposer()
63 : #ifdef DBG_UTIL
64 : :m_bUsed( false )
65 : #endif
66 0 : {
67 0 : }
68 :
69 0 : virtual ~TokenComposer()
70 0 : {
71 0 : }
72 :
73 0 : void operator() (const ::rtl::OUString& lhs)
74 : {
75 0 : append(lhs);
76 0 : }
77 :
78 0 : void append( const ::rtl::OUString& lhs )
79 : {
80 : #ifdef DBG_UTIL
81 : OSL_ENSURE( !m_bUsed, "FilterCreator::append: already used up!" );
82 : #endif
83 0 : if ( !lhs.isEmpty() )
84 : {
85 0 : if ( m_aBuffer.getLength() )
86 0 : appendNonEmptyToNonEmpty( lhs );
87 : else
88 0 : m_aBuffer.append( lhs );
89 : }
90 0 : }
91 :
92 : /// append the given part. Only to be called when both the part and our buffer so far are not empty
93 : virtual void appendNonEmptyToNonEmpty( const ::rtl::OUString& lhs ) = 0;
94 : };
95 :
96 : //====================================================================
97 : //= FilterCreator
98 : //====================================================================
99 0 : struct FilterCreator : public TokenComposer
100 : {
101 0 : virtual void appendNonEmptyToNonEmpty( const ::rtl::OUString& lhs )
102 : {
103 0 : m_aBuffer.insert( 0, (sal_Unicode)' ' );
104 0 : m_aBuffer.insert( 0, (sal_Unicode)'(' );
105 0 : m_aBuffer.appendAscii( " ) AND ( " );
106 0 : m_aBuffer.append( lhs );
107 0 : m_aBuffer.appendAscii( " )" );
108 0 : }
109 : };
110 :
111 : //====================================================================
112 : //= FilterCreator
113 : //====================================================================
114 0 : struct OrderCreator : public TokenComposer
115 : {
116 0 : virtual void appendNonEmptyToNonEmpty( const ::rtl::OUString& lhs )
117 : {
118 0 : m_aBuffer.appendAscii( ", " );
119 0 : m_aBuffer.append( lhs );
120 0 : }
121 : };
122 :
123 : } // namespace dbaccess
124 :
125 : #endif // DBACCESS_SOURCE_CORE_INC_COMPOSERTOOLS_HXX
126 :
127 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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