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    41 

    42 #include "qatomiccomparators_p.h"

    43 #include "qatomicstring_p.h"

    44 #include "qcomparisonplatform_p.h"

    45 #include "qvaluefactory_p.h"

    46 

    47 #include "qcomparisonfactory_p.h"

    48 

    49 QT_BEGIN_NAMESPACE

    50 

    51 using namespace QPatternist;

    52 

    53 /**

    54  * @short Helper class for ComparisonFactory::fromLexical() which exposes

    55  * CastingPlatform appropriately.

    56  *

    57  * @relates ComparisonFactory

    58  */

    59 class PerformComparison : public ComparisonPlatform<PerformComparison, true>

    60                         , public SourceLocationReflection

    61 {

    62 public:

    63     PerformComparison(const SourceLocationReflection *const sourceLocationReflection,

    64                       const AtomicComparator::Operator op) : m_sourceReflection(sourceLocationReflection)

    65                                                            , m_operator(op)

    66     {

    67         Q_ASSERT(m_sourceReflection);

    68     }

    69 

    70     bool operator()(const AtomicValue::Ptr &operand1,

    71                     const AtomicValue::Ptr &operand2,

    72                     const SchemaType::Ptr &type,

    73                     const ReportContext::Ptr &context)

    74     {

    75         const ItemType::Ptr asItemType((AtomicType::Ptr(type)));

    76 

    77         /* One area where the Query Transform world differs from the Schema

    78          * world is that @c xs:duration is not considedered comparable, because

    79          * it's according to Schema is partially comparable. This means

    80          * ComparisonPlatform::fetchComparator() flags it as impossible, and

    81          * hence we need to override that.

    82          *

    83          * SchemaType::wxsTypeMatches() will return true for sub-types of @c

    84          * xs:duration as well, but that's ok since AbstractDurationComparator

    85          * works for them too. */

    86         if(BuiltinTypes::xsDuration->wxsTypeMatches(type))

    87             prepareComparison(AtomicComparator::Ptr(new AbstractDurationComparator()));

    88         else if (BuiltinTypes::xsGYear->wxsTypeMatches(type) ||

    89                  BuiltinTypes::xsGYearMonth->wxsTypeMatches(type) ||

    90                  BuiltinTypes::xsGMonth->wxsTypeMatches(type) ||

    91                  BuiltinTypes::xsGMonthDay->wxsTypeMatches(type) ||

    92                  BuiltinTypes::xsGDay->wxsTypeMatches(type))

    93             prepareComparison(AtomicComparator::Ptr(new AbstractDateTimeComparator()));

    94         else

    95             prepareComparison(fetchComparator(asItemType, asItemType, context));

    96 

    97         return flexibleCompare(operand1, operand2, context);

    98     }

    99 

   100     const SourceLocationReflection *actualReflection() const

   101     {

   102         return m_sourceReflection;

   103     }

   104 

   105     AtomicComparator::Operator operatorID() const

   106     {

   107         return m_operator;

   108     }

   109 

   110 private:

   111     const SourceLocationReflection *const m_sourceReflection;

   112     const AtomicComparator::Operator      m_operator;

   113 };

   114 

   115 bool ComparisonFactory::compare(const AtomicValue::Ptr &operand1,

   116                                 const AtomicComparator::Operator op,

   117                                 const AtomicValue::Ptr &operand2,

   118                                 const SchemaType::Ptr &type,

   119                                 const ReportContext::Ptr &context,

   120                                 const SourceLocationReflection *const sourceLocationReflection)

   121 {

   122     Q_ASSERT(operand1);

   123     Q_ASSERT(operand2);

   124     Q_ASSERT(context);

   125     Q_ASSERT(sourceLocationReflection);

   126     Q_ASSERT(type);

   127     Q_ASSERT_X(type->category() == SchemaType::SimpleTypeAtomic, Q_FUNC_INFO,

   128                "We can only compare atomic values.");

   129 

   130     return PerformComparison(sourceLocationReflection, op)(operand1, operand2, type, context);

   131 }

   132 

   133 bool ComparisonFactory::constructAndCompare(const DerivedString<TypeString>::Ptr &operand1,

   134                                             const AtomicComparator::Operator op,

   135                                             const DerivedString<TypeString>::Ptr &operand2,

   136                                             const SchemaType::Ptr &type,

   137                                             const ReportContext::Ptr &context,

   138                                             const SourceLocationReflection *const sourceLocationReflection)

   139 {

   140     Q_ASSERT(operand1);

   141     Q_ASSERT(operand2);

   142     Q_ASSERT(context);

   143     Q_ASSERT(sourceLocationReflection);

   144     Q_ASSERT(type);

   145     Q_ASSERT_X(type->category() == SchemaType::SimpleTypeAtomic, Q_FUNC_INFO,

   146                "We can only compare atomic values.");

   147 

   148     const AtomicValue::Ptr value1 = ValueFactory::fromLexical(operand1->stringValue(), type, context, sourceLocationReflection);

   149     const AtomicValue::Ptr value2 = ValueFactory::fromLexical(operand2->stringValue(), type, context, sourceLocationReflection);

   150 

   151     return compare(value1, op, value2, type, context, sourceLocationReflection);

   152 }

   153 

   154 QT_END_NAMESPACE