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| #region Licence | ||
| // Copyright (C) 2012-2014 Tomasz Pluskiewicz | ||
| // http://r2rml.net/ | ||
| // r2rml@t-code.pl | ||
| // | ||
| // ------------------------------------------------------------------------ | ||
| // | ||
| // This file is part of r2rml4net. | ||
| // | ||
| // Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| // of this software and associated documentation files (the "Software"), to deal | ||
| // in the Software without restriction, including without limitation the rights | ||
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| // copies of the Software, and to permit persons to whom the Software is | ||
| // furnished to do so, subject to the following conditions: | ||
| // | ||
| // The above copyright notice and this permission notice shall be included in all | ||
| // copies or substantial portions of the Software. | ||
| // | ||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | ||
| // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | ||
| // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE | ||
| // OR OTHER DEALINGS IN THE SOFTWARE. | ||
| // | ||
| // ------------------------------------------------------------------------ | ||
| // | ||
| // r2rml4net may alternatively be used under the LGPL licence | ||
| // | ||
| // http://www.gnu.org/licenses/lgpl.html | ||
| // | ||
| // If these licenses are not suitable for your intended use please contact | ||
| // us at the above stated email address to discuss alternative | ||
| // terms. | ||
| #endregion | ||
|
|
||
| using System; | ||
| using System.Linq; | ||
| using NullGuard; | ||
| using TCode.r2rml4net.Exceptions; | ||
| using TCode.r2rml4net.Mapping.Fluent; | ||
| using VDS.RDF; | ||
|
|
||
| namespace TCode.r2rml4net.Extensions | ||
| { | ||
| public static class GraphExtensions | ||
| { | ||
| [return: AllowNull] | ||
| public static INode GetObjectNode(this TermMapConfiguration termMap, string predicate) | ||
| { | ||
| var predicateNode = termMap.R2RMLMappings.CreateUriNode(predicate); | ||
| var triples = termMap.R2RMLMappings.GetTriplesWithSubjectPredicate(termMap.Node, predicateNode).ToArray(); | ||
|
|
||
| if (triples.Length > 1) | ||
| throw new InvalidMapException( | ||
| string.Format("Term map {1} contains multiple values for predicate {2}:\r\n{0}", | ||
| string.Join("\r\n", triples.Select(triple => triple.Object.ToString())), | ||
| termMap.Node, | ||
| predicateNode.Uri)); | ||
|
|
||
| return triples.SingleOrDefault().GetObject(); | ||
| } | ||
|
|
||
| [return: AllowNull] | ||
| public static string GetLiteral([AllowNull] this INode node) | ||
| { | ||
| var literalNode = node as ILiteralNode; | ||
|
|
||
| if (literalNode != null) | ||
| { | ||
| return literalNode.Value; | ||
| } | ||
|
|
||
| return null; | ||
| } | ||
|
|
||
| [return: AllowNull] | ||
| public static Uri GetIri([AllowNull] this INode node) | ||
| { | ||
| var literalNode = node as IUriNode; | ||
|
|
||
| if (literalNode != null) | ||
| { | ||
| return literalNode.Uri; | ||
| } | ||
|
|
||
| return null; | ||
| } | ||
|
|
||
| private static INode GetObject([AllowNull] this Triple node) | ||
| { | ||
| if (node == null) | ||
| { | ||
| return null; | ||
| } | ||
|
|
||
| return node.Object; | ||
| } | ||
| } | ||
| } |
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