1 /*
2 * This file is part of *** M y C o R e ***
3 * See http://www.mycore.de/ for details.
4 *
5 * MyCoRe is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
9 *
10 * MyCoRe is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with MyCoRe. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19 package org.mycore.mods.enrichment;
20
21 import java.util.List;
22 import java.util.stream.Collectors;
23
24 import org.jdom2.Element;
25 import org.jdom2.filter.Filters;
26 import org.jdom2.xpath.XPathExpression;
27 import org.jdom2.xpath.XPathFactory;
28 import org.mycore.common.MCRConstants;
29
30 /**
31 * Represents a type of publication identifier, like DOI or ISBN.
32 * Each type has a corresponding XPath expression
33 * used to locate or build identifiers of this type within MODS.
34 *
35 * If the corresponding XPath representation is
36 * mods:identifier[@type='TYPE'], no explicit configuration is needed.
37 *
38 * Otherwise, the XPath must be configured, e.g.
39 * MCR.MODS.EnrichmentResolver.IdentifierType.shelfmark=mods:location/mods:shelfLocator
40 *
41 * @author Frank L\u00FCtzenkirchen
42 */
43 public class MCRIdentifierType {
44
45 private String typeID;
46
47 private String xPath;
48
49 private XPathExpression<Element> xPathExpr;
50
51 MCRIdentifierType(String typeID, String xPath) {
52 this.typeID = typeID;
53 this.xPath = xPath;
54 this.xPathExpr = XPathFactory.instance().compile(xPath, Filters.element(), null,
55 MCRConstants.getStandardNamespaces());
56 }
57
58 public String getTypeID() {
59 return typeID;
60 }
61
62 public String getXPath() {
63 return xPath;
64 }
65
66 /** Returns all identifiers of this type found in the given MODS element. */
67 List<MCRIdentifier> getIdentifiers(Element mods) {
68 return xPathExpr.evaluate(mods).stream()
69 .map(e -> new MCRIdentifier(this, e.getTextTrim()))
70 .collect(Collectors.toList());
71 }
72
73 @Override
74 public String toString() {
75 return "identifier type " + typeID;
76 }
77 }