QPatternist::StringComparator Class Reference

Performs case sensitive string comparison between xs:anyUri, xs:string, and xs:untypedAtomic. More...

#include <qatomiccomparators_p.h>

Inheritance diagram for QPatternist::StringComparator:

Public Functions
virtual ComparisonResult	compare (const Item &op1, const AtomicComparator::Operator op, const Item &op2) const
virtual bool	equals (const Item &op1, const Item &op2) const
Public Functions inherited from QPatternist::AtomicComparator
	AtomicComparator ()
virtual	~AtomicComparator ()
Public Functions inherited from QPatternist::AtomicTypeVisitorResult
	AtomicTypeVisitorResult ()
virtual	~AtomicTypeVisitorResult ()
Public Functions inherited from QSharedData
	QSharedData ()
	Constructs a QSharedData object with a reference count of 0. More...
	QSharedData (const QSharedData &)
	Constructs a QSharedData object with reference count 0. More...

Additional Inherited Members
Public Types inherited from QPatternist::AtomicComparator
enum	ComparisonResult { LessThan = 1, Equal = 2, GreaterThan = 4, Incomparable = 8 }
enum	ComparisonType { AsGeneralComparison = 1, AsValueComparison }
enum	Operator {   OperatorEqual = 1, OperatorNotEqual = 1 << 1, OperatorGreaterThan = 1 << 2, OperatorLessThan = 1 << 3,   OperatorLessThanNaNLeast = 1 << 4, OperatorLessThanNaNGreatest = 1 << 5, OperatorGreaterOrEqual = OperatorEqual | OperatorGreaterThan, OperatorLessOrEqual = OperatorEqual | OperatorLessThan }
typedef QFlags< Operator >	Operators
typedef QExplicitlySharedDataPointer< AtomicComparator >	Ptr
Public Types inherited from QPatternist::AtomicTypeVisitorResult
typedef QExplicitlySharedDataPointer< AtomicTypeVisitorResult >	Ptr
Static Public Functions inherited from QPatternist::AtomicComparator
static QString	displayName (const AtomicComparator::Operator op, const ComparisonType type)
Public Variables inherited from QSharedData
QAtomicInt	ref

Detailed Description

Performs case sensitive string comparison between xs:anyUri, xs:string, and xs:untypedAtomic.

Author

Frans Englich frans.nosp@m..eng.nosp@m.lich@.nosp@m.noki.nosp@m.a.com

Definition at line 77 of file qatomiccomparators_p.h.

Functions

compare()

AtomicComparator::ComparisonResult StringComparator::compare ( const Item &  op1, const AtomicComparator::Operator  op, const Item &  op2  ) const

virtual

Compares two strings, and returns the appropriate AtomicComparator::ComparisonResult enum. This is a bit simplified version of string comparison as defined in the XPath specifications, since this does not take any string collations into account(which an implementation neither is required to do).

See also

XQuery 1.0 and XPath 2.0 Functions and Operators, 7.3 ValueComparison::Equality and Comparison of Strings

Reimplemented from QPatternist::AtomicComparator.

Definition at line 57 of file qatomiccomparators.cpp.

{
    const int result = QString::compare(o1.stringValue(), o2.stringValue());

    if(result > 0)
        return GreaterThan;
    else if(result < 0)
        return LessThan;
    else
    {
        Q_ASSERT(result == 0);
        return Equal;
    }
}

equals()

bool StringComparator::equals ( const Item &  op1, const Item &  op2  ) const

virtual

Compares two strings, and returns true if they are considered equal as per an ordinary string comparison. In other words, this is an implementation with the Unicode code point collation.

See also

XQuery 1.0 and XPath 2.0 Functions and Operators, 7.3 ValueComparison::Equality and Comparison of Strings

Implements QPatternist::AtomicComparator.

Definition at line 74 of file qatomiccomparators.cpp.

{
    return o1.stringValue() == o2.stringValue();
}

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The documentation for this class was generated from the following files:

• /src/xmlpatterns/data/qatomiccomparators_p.h
• /src/xmlpatterns/data/qatomiccomparators.cpp