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Nepomuk

  • Nepomuk
  • Query
  • LiteralTerm
Public Member Functions
Nepomuk::Query::LiteralTerm Class Reference

#include <Nepomuk/Query/LiteralTerm>

Inheritance diagram for Nepomuk::Query::LiteralTerm:
Nepomuk::Query::Term

List of all members.

Public Member Functions

 LiteralTerm (const LiteralTerm &term)
 LiteralTerm (const Soprano::LiteralValue &value=Soprano::LiteralValue())
 ~LiteralTerm ()
LiteralTerm & operator= (const LiteralTerm &term)
void setValue (const Soprano::LiteralValue &value)
Soprano::LiteralValue value () const
- Public Member Functions inherited from Nepomuk::Query::Term
 Term ()
 Term (const Term &other)
 ~Term ()
bool isAndTerm () const
bool isComparisonTerm () const
bool isLiteralTerm () const
bool isNegationTerm () const
bool isOptionalTerm () const
bool isOrTerm () const
bool isResourceTerm () const
bool isResourceTypeTerm () const
bool isValid () const
bool operator!= (const Term &term) const
QDebug operator<< (QDebug) const
Term & operator= (const Term &other)
bool operator== (const Term &term) const
Term optimized () const
AndTerm toAndTerm () const
AndTerm & toAndTerm ()
ComparisonTerm toComparisonTerm () const
ComparisonTerm & toComparisonTerm ()
LiteralTerm toLiteralTerm () const
LiteralTerm & toLiteralTerm ()
NegationTerm toNegationTerm () const
NegationTerm & toNegationTerm ()
OptionalTerm toOptionalTerm () const
OptionalTerm & toOptionalTerm ()
OrTerm toOrTerm () const
OrTerm & toOrTerm ()
ResourceTerm toResourceTerm () const
ResourceTerm & toResourceTerm ()
ResourceTypeTerm toResourceTypeTerm () const
ResourceTypeTerm & toResourceTypeTerm ()
QString toString () const
Type type () const

Additional Inherited Members

- Public Types inherited from Nepomuk::Query::Term
enum  Type {
  Invalid, Literal, Resource, And,
  Or, Comparison, ResourceType, Negation,
  Optional
}
- Static Public Member Functions inherited from Nepomuk::Query::Term
static Term fromString (const QString &s)
static Term fromVariant (const Variant &variant)
- Related Functions inherited from Nepomuk::Query::Term
static Term fromProperty (const Types::Property &property, const Variant &variant)

Detailed Description

Match literal properties via full text.

Other than the rest of the terms LiteralTerm has two uses:

Usage in ComparisonTerm

LiteralTerm can be used in a ComparisonTerm with both properties with a literal range and a resource range. The former case is the simple one: the value() of the LiteralTerm will simply be compared to the value of the ComparisonTerm::property(). In the latter case value() will be matched to rdfs:label of any resource. So in essence the following two examples are equal:

ComparisonTerm( Vocabulary::NAO::hasTag(), LiteralTerm("nepomuk") );
ComparisonTerm( Vocabulary::NAO::hasTag(), ComparisonTerm( Vocabulary::RDFS::label(), LiteralTerm("nepomuk") ) );

Usage as "stand-alone" term

As a term by itself LiteralTerm will act like a traditional full text query and match all resources that contain the string value in some property.

LiteralTerm( "nepomuk" );

The example above will match all resources that have a property with a value containing the string "nepomuk".

Examples

LiteralTerm("nepomuk")

searches for the term "nepomuk".

LiteralTerm("'nepomuk*'")

searches for the terms starting with "nepomuk".

LiteralTerm("'nepomuk kde'")

searches for the term "nepomuk kde".

LiteralTerm("'nepomuk* kde'")

searches for terms matching "nepomuk* kde".

LiteralTerm always tries to normalize the query terms as best as possible. This includes automatically adding quotes as needed.

Warning:
Be aware that the examples above apply to using LiteralTerm as a stand-alone term or in a ComparisonTerm::Contains term. When using ComparisonTerm::Regexp the test as specified will be used as-is to create the regular expression.
Author:
Sebastian Trueg trueg.nosp@m.@kde.nosp@m..org
Since:
4.4

Definition at line 86 of file literalterm.h.


Constructor & Destructor Documentation

Nepomuk::Query::LiteralTerm::LiteralTerm ( const LiteralTerm &  term)

Copy constructor.

Nepomuk::Query::LiteralTerm::LiteralTerm ( const Soprano::LiteralValue &  value = Soprano::LiteralValue())

Default constructor.

Parameters:
valueThe value this LiteralTerm should match to.
Nepomuk::Query::LiteralTerm::~LiteralTerm ( )

Desctructor.


Member Function Documentation

LiteralTerm& Nepomuk::Query::LiteralTerm::operator= ( const LiteralTerm &  term)

Assignment operator.

void Nepomuk::Query::LiteralTerm::setValue ( const Soprano::LiteralValue &  value)

Set the value this LiteralTerm should match to.

See also:
value()
Soprano::LiteralValue Nepomuk::Query::LiteralTerm::value ( ) const

The value this LiteralTerm should match to.

See also:
setValue()

The documentation for this class was generated from the following file:
  • literalterm.h
This file is part of the KDE documentation.
Documentation copyright © 1996-2013 The KDE developers.
Generated on Tue Jul 16 2013 17:48:32 by doxygen 1.8.1.1 written by Dimitri van Heesch, © 1997-2006

KDE's Doxygen guidelines are available online.

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