RDF::Core::Storage - An abstract ancestor of storage implementations


RDF-Core documentation Contained in the RDF-Core distribution.

Index


Code Index:

NAME

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RDF::Core::Storage - An abstract ancestor of storage implementations

DESCRIPTION

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Storage is the place where statements reside. It can add, remove, count and get statements and ask about their existence.

Interface

* new(\%options)

Options depend on implementation of descendant. (Such as RDF::Core::Storage::Memory, RDF::Core::Storage::DB_File, RDF::Core::Storage::Postgres.)

* addStmt($statement)

Add RDF::Core::Statement instance to the storage, unless it already exists there.

* removeStmt($statement)

Remove statement from the storage, if it's there.

* existsStmt($subject,$predicate,$object)

Check if statement exists, that matches given mask. Parameters can be undefined, every value matches undefined parameter.

* countStmts($subject,$predicate,$object)

Count matching statements.

* getStmts($subject,$predicate,$object)

Retrieve matching statements. Returns RDF::Core::Enumerator object. (One of it's descendants.)

LICENSE

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This package is subject to the MPL (or the GPL alternatively).

AUTHOR

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Ginger Alliance, rdf@gingerall.cz

SEE ALSO

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RDF::Core::Storage::Memory, RDF::Core::Storage::DB_File, RDF::Core::Storage::Postgres


RDF-Core documentation Contained in the RDF-Core distribution.

# 
# The contents of this file are subject to the Mozilla Public
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# except in compliance with the License. You may obtain a copy of
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# IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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# 
# The Original Code is the RDF::Core module
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package RDF::Core::Storage;

use strict;
require Exporter;

use Carp;

sub new {
    carp "Pure virtual function call.";
}
sub addStmt {
    carp "Pure virtual function call.";
}
sub removeStmt {
    carp "Pure virtual function call.";
}
sub existsStmt {
    carp "Pure virtual function call.";
}
sub getStmts {
    carp "Pure virtual function call.";
}
sub countStmts {
    carp "Pure virtual function call.";
}

1;
__END__