|
1 /**************************************************************************** |
|
2 ** |
|
3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
|
4 ** All rights reserved. |
|
5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
|
6 ** |
|
7 ** This file is part of the QtXmlPatterns module of the Qt Toolkit. |
|
8 ** |
|
9 ** $QT_BEGIN_LICENSE:LGPL$ |
|
10 ** No Commercial Usage |
|
11 ** This file contains pre-release code and may not be distributed. |
|
12 ** You may use this file in accordance with the terms and conditions |
|
13 ** contained in the Technology Preview License Agreement accompanying |
|
14 ** this package. |
|
15 ** |
|
16 ** GNU Lesser General Public License Usage |
|
17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
|
18 ** General Public License version 2.1 as published by the Free Software |
|
19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
|
20 ** packaging of this file. Please review the following information to |
|
21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
|
22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
|
23 ** |
|
24 ** In addition, as a special exception, Nokia gives you certain additional |
|
25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
|
26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
|
27 ** |
|
28 ** If you have questions regarding the use of this file, please contact |
|
29 ** Nokia at qt-info@nokia.com. |
|
30 ** |
|
31 ** |
|
32 ** |
|
33 ** |
|
34 ** |
|
35 ** |
|
36 ** |
|
37 ** |
|
38 ** $QT_END_LICENSE$ |
|
39 ** |
|
40 ****************************************************************************/ |
|
41 |
|
42 // |
|
43 // W A R N I N G |
|
44 // ------------- |
|
45 // |
|
46 // This file is not part of the Qt API. It exists purely as an |
|
47 // implementation detail. This header file may change from version to |
|
48 // version without notice, or even be removed. |
|
49 // |
|
50 // We mean it. |
|
51 |
|
52 #ifndef Patternist_OptimizerBlocks_H |
|
53 #define Patternist_OptimizerBlocks_H |
|
54 |
|
55 #include "qatomiccomparator_p.h" |
|
56 #include "qexpression_p.h" |
|
57 #include "qoptimizerframework_p.h" |
|
58 |
|
59 QT_BEGIN_HEADER |
|
60 |
|
61 QT_BEGIN_NAMESPACE |
|
62 |
|
63 namespace QPatternist |
|
64 { |
|
65 /** |
|
66 * @short Identifies Expression instances by their Expression::id(). |
|
67 * |
|
68 * @author Frans englich <frans.englich@nokia.com> |
|
69 * @ingroup Patternist_expressions |
|
70 */ |
|
71 class ByIDIdentifier : public ExpressionIdentifier |
|
72 { |
|
73 public: |
|
74 ByIDIdentifier(const Expression::ID id); |
|
75 virtual bool matches(const Expression::Ptr &expr) const; |
|
76 private: |
|
77 const Expression::ID m_id; |
|
78 }; |
|
79 |
|
80 /** |
|
81 * @short Identifies Expression instances based on their static type. |
|
82 * |
|
83 * BySequenceTypeIdentifier identifies Expression instances |
|
84 * if their Expression::staticType() matches the requested one, |
|
85 * regardless of whether the Expression is a particular one, such |
|
86 * as AndExpression. |
|
87 * |
|
88 * For example, constructing a BySequenceTypeIdentifier while |
|
89 * passing CommonSequenceTypes::EBV in its constructor will create |
|
90 * a ExpressionIdentifier that returns @c true for a static type with |
|
91 * item type <tt>xs:string</tt>, but returns @c false for a static type involving |
|
92 * <tt>xs:date</tt>. |
|
93 * |
|
94 * @author Frans englich <frans.englich@nokia.com> |
|
95 * @ingroup Patternist_expressions |
|
96 */ |
|
97 class BySequenceTypeIdentifier : public ExpressionIdentifier |
|
98 { |
|
99 public: |
|
100 BySequenceTypeIdentifier(const SequenceType::Ptr &seqType); |
|
101 |
|
102 /** |
|
103 * @returns @c true, if the static type of @p expr is matches |
|
104 * the SequenceType passed in the BySequenceTypeIdentifier() |
|
105 * constructor, otherwise @c false. |
|
106 */ |
|
107 virtual bool matches(const Expression::Ptr &expr) const; |
|
108 |
|
109 private: |
|
110 const SequenceType::Ptr m_seqType; |
|
111 }; |
|
112 |
|
113 /** |
|
114 * @short Determines whether an Expression is a value or general comparison or both, |
|
115 * with a certain operator. |
|
116 * |
|
117 * @author Frans englich <frans.englich@nokia.com> |
|
118 * @ingroup Patternist_expressions |
|
119 */ |
|
120 class ComparisonIdentifier : public ExpressionIdentifier |
|
121 { |
|
122 public: |
|
123 |
|
124 /** |
|
125 * @param comparatorHosts the possible parent that may have |
|
126 * the operator. This may be Expression::IDGeneralComparison or |
|
127 * Expression::IDValueComparison. The two values may also be OR'd, |
|
128 * meaning any of them will do. |
|
129 * |
|
130 * @param op the operator that the comparator host must have. For example, |
|
131 * if @p op is AtomicComparator::OperatorGreatorOrEqual this ComparisonIdentifier |
|
132 * will match operator >= in the case of IDGeneralComparison and 'ge' in the |
|
133 * case of IDValueComparison. |
|
134 */ |
|
135 ComparisonIdentifier(const QVector<Expression::ID> comparatorHosts, |
|
136 const AtomicComparator::Operator op); |
|
137 |
|
138 /** |
|
139 * @returns @c true, if @p expr is a ValueComparison with the operator |
|
140 * passed in ComparisonIdentifier(). |
|
141 */ |
|
142 virtual bool matches(const Expression::Ptr &expr) const; |
|
143 |
|
144 private: |
|
145 const QVector<Expression::ID> m_hosts; |
|
146 const AtomicComparator::Operator m_op; |
|
147 }; |
|
148 |
|
149 /** |
|
150 * @short Matches numeric literals that are of type xs:integer and |
|
151 * has a specific value. |
|
152 * |
|
153 * For example IntegerIdentifier(4) would match the former but |
|
154 * not the latter operand in this expression: "4 + 5". |
|
155 * |
|
156 * @author Frans englich <frans.englich@nokia.com> |
|
157 * @ingroup Patternist_expressions |
|
158 */ |
|
159 class IntegerIdentifier : public ExpressionIdentifier |
|
160 { |
|
161 public: |
|
162 IntegerIdentifier(const xsInteger num); |
|
163 virtual bool matches(const Expression::Ptr &expr) const; |
|
164 |
|
165 private: |
|
166 const xsInteger m_num; |
|
167 }; |
|
168 |
|
169 /** |
|
170 * @short Matches boolean literals. |
|
171 * |
|
172 * For example BooleanIdentifier(true) would match the former but |
|
173 * not the latter operand in this expression: "true() + false()". |
|
174 * |
|
175 * @author Frans englich <frans.englich@nokia.com> |
|
176 * @ingroup Patternist_expressions |
|
177 */ |
|
178 class BooleanIdentifier : public ExpressionIdentifier |
|
179 { |
|
180 public: |
|
181 BooleanIdentifier(const bool value); |
|
182 virtual bool matches(const Expression::Ptr &expr) const; |
|
183 |
|
184 private: |
|
185 const bool m_value; |
|
186 }; |
|
187 |
|
188 /** |
|
189 * @short Creates a particular Expression instance identified by an Expression::ID. |
|
190 * |
|
191 * For example, if ByIDCreator() is passed Expression::IDCountFN, create() |
|
192 * will return CountFN instances. |
|
193 * |
|
194 * @author Frans englich <frans.englich@nokia.com> |
|
195 * @ingroup Patternist_expressions |
|
196 */ |
|
197 class ByIDCreator : public ExpressionCreator |
|
198 { |
|
199 public: |
|
200 /** |
|
201 * Creates a ByIDCreator that creates expressions |
|
202 * of the type that @p id identifies. |
|
203 */ |
|
204 ByIDCreator(const Expression::ID id); |
|
205 virtual Expression::Ptr create(const Expression::List &operands, |
|
206 const StaticContext::Ptr &context, |
|
207 const SourceLocationReflection *const r) const; |
|
208 |
|
209 /** |
|
210 * Creates an expression by id @p id with the arguments @p operands. |
|
211 */ |
|
212 static Expression::Ptr create(const Expression::ID id, |
|
213 const Expression::List &operands, |
|
214 const StaticContext::Ptr &context, |
|
215 const SourceLocationReflection *const r); |
|
216 |
|
217 private: |
|
218 const Expression::ID m_id; |
|
219 }; |
|
220 } |
|
221 |
|
222 QT_END_NAMESPACE |
|
223 |
|
224 QT_END_HEADER |
|
225 |
|
226 #endif |