gecko/rdf/base/idl/nsIRDFContainerUtils.idl

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsISupports.idl"
#include "nsIRDFContainer.idl"
#include "nsIRDFResource.idl"
// Container utilities
[scriptable, uuid(D4214E91-FB94-11D2-BDD8-00104BDE6048)]
interface nsIRDFContainerUtils : nsISupports {
/**
* Returns 'true' if the property is an RDF ordinal property.
*/
boolean IsOrdinalProperty(in nsIRDFResource aProperty);
/**
* Convert the specified index to an ordinal property.
*/
nsIRDFResource IndexToOrdinalResource(in long aIndex);
/**
* Convert the specified ordinal property into an index
*/
long OrdinalResourceToIndex(in nsIRDFResource aOrdinal);
/**
* Return 'true' if the specified resource is a container
*/
boolean IsContainer(in nsIRDFDataSource aDataSource, in nsIRDFResource aResource);
/**
* Return 'true' if the specified resource is a container and it is empty
*/
boolean IsEmpty(in nsIRDFDataSource aDataSource, in nsIRDFResource aResource);
/**
* Return 'true' if the specified resource is a bag
*/
boolean IsBag(in nsIRDFDataSource aDataSource, in nsIRDFResource aResource);
/**
* Return 'true' if the specified resource is a sequence
*/
boolean IsSeq(in nsIRDFDataSource aDataSource, in nsIRDFResource aResource);
/**
* Return 'true' if the specified resource is an alternation
*/
boolean IsAlt(in nsIRDFDataSource aDataSource, in nsIRDFResource aResource);
/**
* Decorates the specified resource appropriately to make it
* usable as an empty bag in the specified data source.
*/
nsIRDFContainer MakeBag(in nsIRDFDataSource aDataSource, in nsIRDFResource aResource);
/**
* Decorates the specified resource appropriately to make it
* usable as an empty sequence in the specified data source.
*/
nsIRDFContainer MakeSeq(in nsIRDFDataSource aDataSource, in nsIRDFResource aResource);
/**
* Decorates the specified resource appropriately to make it
* usable as an empty alternation in the specified data source.
*/
nsIRDFContainer MakeAlt(in nsIRDFDataSource aDataSource, in nsIRDFResource aResource);
/**
* Retrieve the index of element in the container. Returns -1 if
* the element is not in the container.
*/
long indexOf(in nsIRDFDataSource aDataSource, in nsIRDFResource aContainer, in nsIRDFNode aElement);
};
%{C++
extern nsresult
NS_NewRDFContainerUtils(nsIRDFContainerUtils** aResult);
%}