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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):
- * Jan Varga <varga@ku.sk>
- *
- * 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 "nsISupportsArray.idl"
- #include "nsIRDFResource.idl"
- #include "nsIRDFNode.idl"
- #include "nsISimpleEnumerator.idl"
- #include "nsIRDFObserver.idl"
-
- %{C++
- #include "nsISupportsArray.h"
- %}
-
- [scriptable, uuid(0F78DA58-8321-11d2-8EAC-00805F29F370)]
- interface nsIRDFDataSource : nsISupports
- {
- /** The "URI" of the data source. This used by the RDF service's
- * |GetDataSource()| method to cache datasources.
- */
- readonly attribute string URI;
-
- /** Find an RDF resource that points to a given node over the
- * specified arc & truth value
- *
- * @return NS_RDF_NO_VALUE if there is no source that leads
- * to the target with the specified property.
- */
- nsIRDFResource GetSource(in nsIRDFResource aProperty,
- in nsIRDFNode aTarget,
- in boolean aTruthValue);
-
- /**
- * Find all RDF resources that point to a given node over the
- * specified arc & truth value
- *
- * @return NS_OK unless a catastrophic error occurs. If the
- * method returns NS_OK, you may assume that nsISimpleEnumerator points
- * to a valid (but possibly empty) cursor.
- */
- nsISimpleEnumerator GetSources(in nsIRDFResource aProperty,
- in nsIRDFNode aTarget,
- in boolean aTruthValue);
-
- /**
- * Find a child of that is related to the source by the given arc
- * arc and truth value
- *
- * @return NS_RDF_NO_VALUE if there is no target accessable from the
- * source via the specified property.
- */
- nsIRDFNode GetTarget(in nsIRDFResource aSource,
- in nsIRDFResource aProperty,
- in boolean aTruthValue);
-
- /**
- * Find all children of that are related to the source by the given arc
- * arc and truth value.
- *
- * @return NS_OK unless a catastrophic error occurs. If the
- * method returns NS_OK, you may assume that nsISimpleEnumerator points
- * to a valid (but possibly empty) cursor.
- */
- nsISimpleEnumerator GetTargets(in nsIRDFResource aSource,
- in nsIRDFResource aProperty,
- in boolean aTruthValue);
-
- /**
- * Add an assertion to the graph.
- */
- void Assert(in nsIRDFResource aSource,
- in nsIRDFResource aProperty,
- in nsIRDFNode aTarget,
- in boolean aTruthValue);
-
- /**
- * Remove an assertion from the graph.
- */
- void Unassert(in nsIRDFResource aSource,
- in nsIRDFResource aProperty,
- in nsIRDFNode aTarget);
-
- /**
- * Change an assertion from
- *
- * [aSource]--[aProperty]-->[aOldTarget]
- *
- * to
- *
- * [aSource]--[aProperty]-->[aNewTarget]
- */
- void Change(in nsIRDFResource aSource,
- in nsIRDFResource aProperty,
- in nsIRDFNode aOldTarget,
- in nsIRDFNode aNewTarget);
-
- /**
- * 'Move' an assertion from
- *
- * [aOldSource]--[aProperty]-->[aTarget]
- *
- * to
- *
- * [aNewSource]--[aProperty]-->[aTarget]
- */
- void Move(in nsIRDFResource aOldSource,
- in nsIRDFResource aNewSource,
- in nsIRDFResource aProperty,
- in nsIRDFNode aTarget);
-
- /**
- * Query whether an assertion exists in this graph.
- */
- boolean HasAssertion(in nsIRDFResource aSource,
- in nsIRDFResource aProperty,
- in nsIRDFNode aTarget,
- in boolean aTruthValue);
-
- /**
- * Add an observer to this data source. If the datasource
- * supports observers, the datasource source should hold a strong
- * reference to the observer.
- */
- void AddObserver(in nsIRDFObserver aObserver);
-
- /**
- * Remove an observer from this data source.
- */
- void RemoveObserver(in nsIRDFObserver aObserver);
-
- /**
- * Get a cursor to iterate over all the arcs that point into a node.
- *
- * @return NS_OK unless a catastrophic error occurs. If the method
- * returns NS_OK, you may assume that labels points to a valid (but
- * possible empty) nsISimpleEnumerator object.
- */
- nsISimpleEnumerator ArcLabelsIn(in nsIRDFNode aNode);
-
- /**
- * Get a cursor to iterate over all the arcs that originate in
- * a resource.
- *
- * @return NS_OK unless a catastrophic error occurs. If the method
- * returns NS_OK, you may assume that labels points to a valid (but
- * possible empty) nsISimpleEnumerator object.
- */
- nsISimpleEnumerator ArcLabelsOut(in nsIRDFResource aSource);
-
- /**
- * Retrieve all of the resources that the data source currently
- * refers to.
- */
- nsISimpleEnumerator GetAllResources();
-
- /**
- * Returns whether a given command is enabled for a set of sources.
- */
- boolean IsCommandEnabled(in nsISupportsArray aSources,
- in nsIRDFResource aCommand,
- in nsISupportsArray aArguments);
-
- /**
- * Perform the specified command on set of sources.
- */
- void DoCommand(in nsISupportsArray aSources,
- in nsIRDFResource aCommand,
- in nsISupportsArray aArguments);
-
- /**
- * Returns the set of all commands defined for a given source.
- */
- nsISimpleEnumerator GetAllCmds(in nsIRDFResource aSource);
-
- /**
- * Returns true if the specified node is pointed to by the specified arc.
- * Equivalent to enumerating ArcLabelsIn and comparing for the specified arc.
- */
- boolean hasArcIn(in nsIRDFNode aNode, in nsIRDFResource aArc);
-
- /**
- * Returns true if the specified node has the specified outward arc.
- * Equivalent to enumerating ArcLabelsOut and comparing for the specified arc.
- */
- boolean hasArcOut(in nsIRDFResource aSource, in nsIRDFResource aArc);
-
- /**
- * Notify observers that the datasource is about to send several
- * notifications at once.
- * This must be followed by calling endUpdateBatch(), otherwise
- * viewers will get out of sync.
- */
- void beginUpdateBatch();
-
- /**
- * Notify observers that the datasource has completed issuing
- * a notification group.
- */
- void endUpdateBatch();
- };
-