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/* -*- 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 "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);
%}
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