69 lines
2.3 KiB
Plaintext
69 lines
2.3 KiB
Plaintext
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "nsIRDFDataSource.idl"
|
|
|
|
interface nsISimpleEnumerator;
|
|
|
|
/**
|
|
* An nsIRDFCompositeDataSource composes individual data sources, providing
|
|
* the illusion of a single, coherent RDF graph.
|
|
*/
|
|
[scriptable, uuid(96343820-307C-11D2-BC15-00805F912FE7)]
|
|
interface nsIRDFCompositeDataSource : nsIRDFDataSource {
|
|
|
|
/**
|
|
*
|
|
* Set this value to <code>true</code> if the composite datasource
|
|
* may contains at least one datasource that has <em>negative</em>
|
|
* assertions. (This is the default.)
|
|
*
|
|
* Set this value to <code>false</code> if none of the datasources
|
|
* being composed contains a negative assertion. This allows the
|
|
* composite datasource to perform some query optimizations.
|
|
*
|
|
* By default, this value is <code>true</true>.
|
|
*/
|
|
attribute boolean allowNegativeAssertions;
|
|
|
|
/**
|
|
* Set to <code>true</code> if the composite datasource should
|
|
* take care to coalesce duplicate arcs when returning values from
|
|
* queries. (This is the default.)
|
|
*
|
|
* Set to <code>false</code> if the composite datasource shouldn't
|
|
* bother to check for duplicates. This allows the composite
|
|
* datasource to more efficiently answer queries.
|
|
*
|
|
* By default, this value is <code>true</code>.
|
|
*/
|
|
attribute boolean coalesceDuplicateArcs;
|
|
|
|
/**
|
|
* Add a datasource the the composite data source.
|
|
* @param aDataSource the datasource to add to composite
|
|
*/
|
|
void AddDataSource(in nsIRDFDataSource aDataSource);
|
|
|
|
/**
|
|
* Remove a datasource from the composite data source.
|
|
* @param aDataSource the datasource to remove from the composite
|
|
*/
|
|
void RemoveDataSource(in nsIRDFDataSource aDataSource);
|
|
|
|
/**
|
|
* Retrieve the datasources in the composite data source.
|
|
* @return an nsISimpleEnumerator that will enumerate each
|
|
* of the datasources in the composite
|
|
*/
|
|
nsISimpleEnumerator GetDataSources();
|
|
};
|
|
|
|
%{C++
|
|
extern nsresult
|
|
NS_NewRDFCompositeDataSource(nsIRDFCompositeDataSource** result);
|
|
%}
|
|
|