#658 Moved code from class ThUniBibUtils to Utilities class (#659)

common/src/main/java/de/uni_jena/thunibib/Utilities.java

@@ -1,13 +1,112 @@
 package de.uni_jena.thunibib;
 
+import jakarta.persistence.EntityManager;
+import jakarta.persistence.criteria.CriteriaBuilder;
+import jakarta.persistence.criteria.CriteriaQuery;
+import jakarta.persistence.criteria.Root;
+import jakarta.persistence.criteria.SetJoin;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.mycore.backend.jpa.MCREntityManagerProvider;
+import org.mycore.common.config.MCRConfiguration2;
+import org.mycore.datamodel.classifications2.MCRCategory;
+import org.mycore.datamodel.classifications2.MCRCategoryDAO;
+import org.mycore.datamodel.classifications2.MCRCategoryDAOFactory;
+import org.mycore.datamodel.classifications2.MCRCategoryID;
+import org.mycore.datamodel.classifications2.MCRLabel;
+import org.mycore.user2.MCRUser;
+import org.mycore.user2.MCRUserAttribute;
+import org.mycore.user2.MCRUserAttribute_;
+import org.mycore.user2.MCRUser_;
+
+import java.util.Arrays;
+import java.util.List;
 import java.util.Locale;
+import java.util.Optional;
 
 public class Utilities {
+    protected static final Logger LOGGER = LogManager.getLogger(Utilities.class);
+
+    protected static final String LEAD_ID_NAME = "id_" + MCRConfiguration2
+        .getString("MCR.user2.matching.lead_id")
+        .get();
+
     public static String toUpperCase(String s) {
         return s.toUpperCase(Locale.ROOT);
     }
 
     public static String toLowerCase(String s) {
         return s.toLowerCase(Locale.ROOT);
     }
+
+    /**
+     * Gets the lead for a given other name identifier for a MCRUser.
+     *
+     * @param nameOther the name of the id e.g. <code>connection</code>
+     * @param valueOther the value of the other id e.g. <code>64cffb9e-be26-497e-8abd-dfdcf07c62cf</code>
+     *
+     * @return null when the lead id could not be found.
+     * */
+    public static String getLeadId(String nameOther, String valueOther) {
+        EntityManager em = MCREntityManagerProvider.getCurrentEntityManager();
+        CriteriaBuilder cb = em.getCriteriaBuilder();
+        CriteriaQuery<MCRUser> query = cb.createQuery(MCRUser.class);
+        Root<MCRUser> users = query.from(MCRUser.class);
+        SetJoin<MCRUser, MCRUserAttribute> join = users.join(MCRUser_.attributes);
+        List<MCRUser> resultList = em.createQuery(
+                query
+                    .select(users)
+                    .where(cb.and(cb.equal(join.get(MCRUserAttribute_.name), nameOther), cb.equal(join.get(
+                        MCRUserAttribute_.value), valueOther))))
+            .getResultList();
+
+        if (resultList.size() == 0 || resultList.size() > 1) {
+            return null;
+        }
+
+        Optional<MCRUserAttribute> leadIdAttr = resultList.get(0)
+            .getAttributes()
+            .stream()
+            .filter(attr -> attr.getName().equals(LEAD_ID_NAME))
+            .findFirst();
+
+        return leadIdAttr.isEmpty() ? null : leadIdAttr.get().getValue();
+    }
+
+    /**
+     * Returns the x-mapping for the given mapping prefix.
+     * <br/>
+     * Example: <code>getXMapping("mir_genres", "article", "schemaOrg")</code> will return <code>ScholarlyArticle</code>
+     *
+     * @param classificationId
+     * @param categoryId
+     * @param mappingPrefix
+     *
+     * @return the mapping or an empty string when there is no such mapping for the given parameters
+     * */
+    public static String getXMapping(String classificationId, String categoryId, String mappingPrefix) {
+        MCRCategory category = null;
+        try {
+            MCRCategoryID categID = MCRCategoryID.fromString(classificationId + ":" + categoryId);
+            MCRCategoryDAO dao = MCRCategoryDAOFactory.getInstance();
+            category = dao.getCategory(categID, 0);
+            Optional<MCRLabel> label = category.getLabel("x-mapping");
+            if (label.isEmpty()) {
+                return "";
+            }
+            MCRLabel xmapping = label.get();
+            if (!xmapping.getText().contains(mappingPrefix)) {
+                return "";
+            }
+
+            Optional<String> result = Arrays.stream(xmapping.getText().split(" "))
+                .filter(mapping -> mapping.startsWith(mappingPrefix))
+                .findFirst();
+
+            return result.isPresent() ? result.get().split(":")[1] : "";
+        } catch (Throwable e) {
+            LOGGER.error("Could not load {}:{}", classificationId, categoryId, e);
+            return "";
+        }
+    }
 }

common/src/main/resources/xslt/mycoreobject-mods-detailed.xsl

@@ -20,7 +20,7 @@
 
   <xsl:template match="mods:name[mods:nameIdentifier[@type = 'connection']]">
     <xsl:variable name="connection-id" select="mods:nameIdentifier[@type = 'connection']"/>
-    <xsl:variable name="lead-id" select="fn:document(concat('callJava:de.uni_jena.thunibib.user.ThUniBibUtils:getLeadId:id_connection:', $connection-id))"/>
+    <xsl:variable name="lead-id" select="fn:document(concat('callJava:de.uni_jena.thunibib.ThUniBibUtils:getLeadId:id_connection:', $connection-id))"/>
 
     <xsl:copy>
       <xsl:copy-of select="*|@*"/>