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236 lines
8.1 KiB
Plaintext
236 lines
8.1 KiB
Plaintext
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Jan Varga <varga@ku.sk>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsISupports.idl"
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#include "nsISupportsArray.idl"
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#include "nsIRDFResource.idl"
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#include "nsIRDFNode.idl"
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#include "nsISimpleEnumerator.idl"
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#include "nsIRDFObserver.idl"
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%{C++
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#include "nsISupportsArray.h"
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%}
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[scriptable, uuid(0F78DA58-8321-11d2-8EAC-00805F29F370)]
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interface nsIRDFDataSource : nsISupports
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{
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/** The "URI" of the data source. This used by the RDF service's
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* |GetDataSource()| method to cache datasources.
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*/
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readonly attribute string URI;
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/** Find an RDF resource that points to a given node over the
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* specified arc & truth value
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*
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* @return NS_RDF_NO_VALUE if there is no source that leads
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* to the target with the specified property.
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*/
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nsIRDFResource GetSource(in nsIRDFResource aProperty,
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in nsIRDFNode aTarget,
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in boolean aTruthValue);
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/**
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* Find all RDF resources that point to a given node over the
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* specified arc & truth value
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*
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* @return NS_OK unless a catastrophic error occurs. If the
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* method returns NS_OK, you may assume that nsISimpleEnumerator points
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* to a valid (but possibly empty) cursor.
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*/
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nsISimpleEnumerator GetSources(in nsIRDFResource aProperty,
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in nsIRDFNode aTarget,
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in boolean aTruthValue);
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/**
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* Find a child of that is related to the source by the given arc
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* arc and truth value
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*
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* @return NS_RDF_NO_VALUE if there is no target accessible from the
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* source via the specified property.
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*/
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nsIRDFNode GetTarget(in nsIRDFResource aSource,
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in nsIRDFResource aProperty,
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in boolean aTruthValue);
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/**
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* Find all children of that are related to the source by the given arc
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* arc and truth value.
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*
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* @return NS_OK unless a catastrophic error occurs. If the
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* method returns NS_OK, you may assume that nsISimpleEnumerator points
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* to a valid (but possibly empty) cursor.
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*/
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nsISimpleEnumerator GetTargets(in nsIRDFResource aSource,
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in nsIRDFResource aProperty,
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in boolean aTruthValue);
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/**
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* Add an assertion to the graph.
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*/
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void Assert(in nsIRDFResource aSource,
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in nsIRDFResource aProperty,
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in nsIRDFNode aTarget,
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in boolean aTruthValue);
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/**
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* Remove an assertion from the graph.
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*/
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void Unassert(in nsIRDFResource aSource,
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in nsIRDFResource aProperty,
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in nsIRDFNode aTarget);
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/**
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* Change an assertion from
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*
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* [aSource]--[aProperty]-->[aOldTarget]
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*
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* to
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*
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* [aSource]--[aProperty]-->[aNewTarget]
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*/
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void Change(in nsIRDFResource aSource,
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in nsIRDFResource aProperty,
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in nsIRDFNode aOldTarget,
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in nsIRDFNode aNewTarget);
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/**
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* 'Move' an assertion from
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*
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* [aOldSource]--[aProperty]-->[aTarget]
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*
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* to
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*
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* [aNewSource]--[aProperty]-->[aTarget]
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*/
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void Move(in nsIRDFResource aOldSource,
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in nsIRDFResource aNewSource,
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in nsIRDFResource aProperty,
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in nsIRDFNode aTarget);
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/**
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* Query whether an assertion exists in this graph.
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*/
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boolean HasAssertion(in nsIRDFResource aSource,
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in nsIRDFResource aProperty,
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in nsIRDFNode aTarget,
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in boolean aTruthValue);
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/**
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* Add an observer to this data source. If the datasource
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* supports observers, the datasource source should hold a strong
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* reference to the observer.
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*/
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void AddObserver(in nsIRDFObserver aObserver);
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/**
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* Remove an observer from this data source.
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*/
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void RemoveObserver(in nsIRDFObserver aObserver);
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/**
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* Get a cursor to iterate over all the arcs that point into a node.
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*
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* @return NS_OK unless a catastrophic error occurs. If the method
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* returns NS_OK, you may assume that labels points to a valid (but
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* possible empty) nsISimpleEnumerator object.
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*/
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nsISimpleEnumerator ArcLabelsIn(in nsIRDFNode aNode);
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/**
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* Get a cursor to iterate over all the arcs that originate in
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* a resource.
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*
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* @return NS_OK unless a catastrophic error occurs. If the method
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* returns NS_OK, you may assume that labels points to a valid (but
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* possible empty) nsISimpleEnumerator object.
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*/
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nsISimpleEnumerator ArcLabelsOut(in nsIRDFResource aSource);
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/**
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* Retrieve all of the resources that the data source currently
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* refers to.
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*/
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nsISimpleEnumerator GetAllResources();
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/**
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* Returns whether a given command is enabled for a set of sources.
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*/
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boolean IsCommandEnabled(in nsISupportsArray aSources,
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in nsIRDFResource aCommand,
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in nsISupportsArray aArguments);
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/**
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* Perform the specified command on set of sources.
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*/
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void DoCommand(in nsISupportsArray aSources,
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in nsIRDFResource aCommand,
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in nsISupportsArray aArguments);
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/**
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* Returns the set of all commands defined for a given source.
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*/
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nsISimpleEnumerator GetAllCmds(in nsIRDFResource aSource);
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/**
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* Returns true if the specified node is pointed to by the specified arc.
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* Equivalent to enumerating ArcLabelsIn and comparing for the specified arc.
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*/
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boolean hasArcIn(in nsIRDFNode aNode, in nsIRDFResource aArc);
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/**
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* Returns true if the specified node has the specified outward arc.
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* Equivalent to enumerating ArcLabelsOut and comparing for the specified arc.
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*/
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boolean hasArcOut(in nsIRDFResource aSource, in nsIRDFResource aArc);
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/**
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* Notify observers that the datasource is about to send several
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* notifications at once.
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* This must be followed by calling endUpdateBatch(), otherwise
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* viewers will get out of sync.
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*/
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void beginUpdateBatch();
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/**
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* Notify observers that the datasource has completed issuing
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* a notification group.
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*/
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void endUpdateBatch();
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};
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