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183 lines
5.8 KiB
Plaintext
183 lines
5.8 KiB
Plaintext
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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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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[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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* @throws 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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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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* @throws 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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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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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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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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