summaryrefslogtreecommitdiffstats
path: root/src/xmlpatterns/functions/qaggregatefns.cpp
blob: e0ed9506f35c949cd7e04c4a811d7e3e11c51ab3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qabstractfloat_p.h"
#include "qarithmeticexpression_p.h"
#include "qbuiltintypes_p.h"
#include "qcommonsequencetypes_p.h"
#include "qcommonvalues_p.h"
#include "qdecimal_p.h"
#include "qgenericsequencetype_p.h"
#include "qinteger_p.h"
#include "qoptimizerblocks_p.h"
#include "qsequencefns_p.h"
#include "quntypedatomicconverter_p.h"

#include "qaggregatefns_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

Item CountFN::evaluateSingleton(const DynamicContext::Ptr &context) const
{
    return Integer::fromValue(m_operands.first()->evaluateSequence(context)->count());
}

Expression::Ptr CountFN::typeCheck(const StaticContext::Ptr &context,
                                   const SequenceType::Ptr &reqType)
{
    if(*CommonSequenceTypes::EBV->itemType() == *reqType->itemType())
    {
        return ByIDCreator::create(IDExistsFN, operands(), context, this)->typeCheck(context, reqType);
    }
    else
        return FunctionCall::typeCheck(context, reqType);
}

Expression::Ptr CountFN::compress(const StaticContext::Ptr &context)
{
    const Expression::Ptr me(FunctionCall::compress(context));
    if(me != this)
        return me;

    const Cardinality card(m_operands.first()->staticType()->cardinality());
    if(card.isExactlyOne())
        return wrapLiteral(CommonValues::IntegerOne, context, this);
    else if(card.isEmpty())
    {
        /* One might think that if the operand is (), that compress() would have
         * evaluated us and therefore this line never be reached, but "()" can
         * be combined with the DisableElimination flag. */
        return wrapLiteral(CommonValues::IntegerZero, context, this);
    }
    else if(card.isExact())
        return wrapLiteral(Integer::fromValue(card.minimum()), context, this);
    else
        return me;
}

Expression::Ptr AddingAggregate::typeCheck(const StaticContext::Ptr &context,
                                           const SequenceType::Ptr &reqType)
{
    const Expression::Ptr me(FunctionCall::typeCheck(context, reqType));
    ItemType::Ptr t1(m_operands.first()->staticType()->itemType());

    if(*CommonSequenceTypes::Empty == *t1)
        return me;
    else if(*BuiltinTypes::xsAnyAtomicType == *t1 ||
            *BuiltinTypes::numeric == *t1)
        return me;
    else if(BuiltinTypes::xsUntypedAtomic->xdtTypeMatches(t1))
    {
        m_operands.replace(0, Expression::Ptr(new UntypedAtomicConverter(m_operands.first(),
                                                                         BuiltinTypes::xsDouble)));
        t1 = m_operands.first()->staticType()->itemType();
    }
    else if(!BuiltinTypes::numeric->xdtTypeMatches(t1) &&
            !BuiltinTypes::xsDayTimeDuration->xdtTypeMatches(t1) &&
            !BuiltinTypes::xsYearMonthDuration->xdtTypeMatches(t1))
    {
        /* Translator, don't translate the type names. */
        context->error(QtXmlPatterns::tr("The first argument to %1 cannot be "
                                         "of type %2. It must be a numeric "
                                         "type, xs:yearMonthDuration or "
                                         "xs:dayTimeDuration.")
                       .arg(formatFunction(context->namePool(), signature()))
                       .arg(formatType(context->namePool(),
                                       m_operands.first()->staticType())),
                       ReportContext::FORG0006, this);
    }

    if(!m_operands.first()->staticType()->cardinality().allowsMany())
        return m_operands.first();

    /* We know fetchMathematician won't attempt a rewrite of the operand, so this is safe. */
    m_mather = ArithmeticExpression::fetchMathematician(m_operands.first(), m_operands.first(),
                                                        AtomicMathematician::Add, true, context,
                                                        this,
                                                        ReportContext::FORG0006);
    return me;
}

Item AvgFN::evaluateSingleton(const DynamicContext::Ptr &context) const
{
    const Item::Iterator::Ptr it(m_operands.first()->evaluateSequence(context));
    Item sum(it->next());

    xsInteger count = 0;
    while(sum)
    {
        ++count;
        const Item next(it->next());
        if(!next)
            break;

        sum = ArithmeticExpression::flexiblyCalculate(sum, AtomicMathematician::Add,
                                                      next, m_adder, context,
                                                      this,
                                                      ReportContext::FORG0006);
    };

    if(!sum)
        return Item();

    /* Note that we use the same m_mather which was used for adding,
     * can be worth to think about. */
    return ArithmeticExpression::flexiblyCalculate(sum, AtomicMathematician::Div,
                                                   Integer::fromValue(count),
                                                   m_divider, context,
                                                   this,
                                                   ReportContext::FORG0006);
}

Expression::Ptr AvgFN::typeCheck(const StaticContext::Ptr &context,
                                 const SequenceType::Ptr &reqType)
{
    const Expression::Ptr me(FunctionCall::typeCheck(context, reqType));
    ItemType::Ptr t1(m_operands.first()->staticType()->itemType());

    if(*CommonSequenceTypes::Empty == *t1)
        return me;
    else if(*BuiltinTypes::xsAnyAtomicType == *t1 ||
            *BuiltinTypes::numeric == *t1)
        return me;
    else if(BuiltinTypes::xsUntypedAtomic->xdtTypeMatches(t1))
    {
        m_operands.replace(0, Expression::Ptr(new UntypedAtomicConverter(m_operands.first(),
                                                                         BuiltinTypes::xsDouble)));
        t1 = m_operands.first()->staticType()->itemType();
    }
    else if(!BuiltinTypes::numeric->xdtTypeMatches(t1) &&
            !BuiltinTypes::xsDayTimeDuration->xdtTypeMatches(t1) &&
            !BuiltinTypes::xsYearMonthDuration->xdtTypeMatches(t1))
    {
        /* Translator, don't translate the type names. */
        context->error(QtXmlPatterns::tr("The first argument to %1 cannot be "
                                         "of type %2. It must be of type %3, "
                                         "%4, or %5.")
                          .arg(signature())
                          .arg(formatType(context->namePool(), m_operands.first()->staticType()))
                          .arg(formatType(context->namePool(), BuiltinTypes::numeric))
                          .arg(formatType(context->namePool(), BuiltinTypes::xsYearMonthDuration))
                          .arg(formatType(context->namePool(), BuiltinTypes::xsDayTimeDuration)),
                       ReportContext::FORG0006, this);
    }

    if(!m_operands.first()->staticType()->cardinality().allowsMany())
        return m_operands.first();

    /* We use CommonValues::IntegerOne here because it is an arbitrary Expression
     * of type xs:integer */
    Expression::Ptr op2(wrapLiteral(CommonValues::IntegerOne, context, this));
    m_adder = ArithmeticExpression::fetchMathematician(m_operands.first(), m_operands.first(),
                                                       AtomicMathematician::Add, true, context, this);
    m_divider = ArithmeticExpression::fetchMathematician(m_operands.first(), op2,
                                                         AtomicMathematician::Div, true, context, this);
    return me;
}

SequenceType::Ptr AvgFN::staticType() const
{
    const SequenceType::Ptr opt(m_operands.first()->staticType());
    ItemType::Ptr t(opt->itemType());

    if(BuiltinTypes::xsUntypedAtomic->xdtTypeMatches(t))
        t = BuiltinTypes::xsDouble; /* xsUntypedAtomics are converted to xsDouble. */
    else if(BuiltinTypes::xsInteger->xdtTypeMatches(t))
        t = BuiltinTypes::xsDecimal;

    /* else, it means the type is xsDayTimeDuration, xsYearMonthDuration,
     * xsDouble, xsFloat or xsAnyAtomicType, which we use as is. */
    return makeGenericSequenceType(BuiltinTypes::xsAnyAtomicType->xdtTypeMatches(t) ? t : ItemType::Ptr(BuiltinTypes::xsAnyAtomicType),
                                   opt->cardinality().toWithoutMany());
}

Item SumFN::evaluateSingleton(const DynamicContext::Ptr &context) const
{
    const Item::Iterator::Ptr it(m_operands.first()->evaluateSequence(context));
    Item sum(it->next());

    while(sum)
    {
        const Item next(it->next());
        if(!next)
            break;

        sum = ArithmeticExpression::flexiblyCalculate(sum, AtomicMathematician::Add,
                                                      next, m_mather, context, this,
                                                      ReportContext::FORG0006);
    };

    if(!sum)
    {
        if(m_operands.count() == 1)
            return CommonValues::IntegerZero;
        else
            return m_operands.last()->evaluateSingleton(context);
    }

    return sum;
}

Expression::Ptr SumFN::typeCheck(const StaticContext::Ptr &context,
                                 const SequenceType::Ptr &reqType)
{
    const Expression::Ptr me(AddingAggregate::typeCheck(context, reqType));

    if(*CommonSequenceTypes::Empty == *m_operands.first()->staticType()->itemType())
    {
        if(m_operands.count() == 1)
            return wrapLiteral(CommonValues::IntegerZero, context, this);
        else
            return m_operands.at(1);
    }

    if(m_operands.count() == 1)
        return me;

    const ItemType::Ptr t(m_operands.at(1)->staticType()->itemType());

    if(!BuiltinTypes::numeric->xdtTypeMatches(t) &&
       !BuiltinTypes::xsAnyAtomicType->xdtTypeMatches(t) &&
       *CommonSequenceTypes::Empty != *t &&
       !BuiltinTypes::xsDayTimeDuration->xdtTypeMatches(t) &&
       !BuiltinTypes::xsYearMonthDuration->xdtTypeMatches(t))
    {
        context->error(QtXmlPatterns::tr("The second argument to %1 cannot be "
                                         "of type %2. It must be of type %3, "
                                         "%4, or %5.")
                          .arg(formatFunction(context->namePool(), signature()))
                          .arg(formatType(context->namePool(), m_operands.at(1)->staticType()))
                          .arg(formatType(context->namePool(), BuiltinTypes::numeric))
                          .arg(formatType(context->namePool(), BuiltinTypes::xsYearMonthDuration))
                          .arg(formatType(context->namePool(), BuiltinTypes::xsDayTimeDuration)),
                       ReportContext::FORG0006, this);
        return me;
    }

    return me;
}

SequenceType::Ptr SumFN::staticType() const
{
    const SequenceType::Ptr t(m_operands.first()->staticType());

    if(m_operands.count() == 1)
    {
        return makeGenericSequenceType(t->itemType() | BuiltinTypes::xsInteger,
                                       Cardinality::exactlyOne());
    }
    else
    {
        return makeGenericSequenceType(t->itemType() | m_operands.at(1)->staticType()->itemType(),
                                       t->cardinality().toWithoutMany());
    }
}

QT_END_NAMESPACE