add forgotten files

buda-base · Mar 21, 2023 · 224890e · 224890e
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diff --git a/src/main/java/io/bdrc/iiif/image/service/ContentLocationService.java b/src/main/java/io/bdrc/iiif/image/service/ContentLocationService.java
@@ -0,0 +1,73 @@
+package io.bdrc.iiif.image.service;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.jena.query.Query;
+import org.apache.jena.query.QueryExecution;
+import org.apache.jena.query.QueryFactory;
+import org.apache.jena.rdf.model.Model;
+import org.apache.jena.rdf.model.Property;
+import org.apache.jena.rdf.model.ResIterator;
+import org.apache.jena.rdf.model.Resource;
+import org.apache.jena.rdf.model.ResourceFactory;
+import org.apache.jena.rdf.model.Statement;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import io.bdrc.iiif.core.Application;
+import io.bdrc.iiif.exceptions.IIIFException;
+import io.bdrc.iiif.model.ContentLocation;
+import io.bdrc.iiif.resolver.AppConstants;
+import io.bdrc.libraries.Models;
+
+
+
+public class ContentLocationService extends ConcurrentResourceService<List<ContentLocation>> {
+
+    private static final Logger logger = LoggerFactory.getLogger(ContentLocationService.class);
+    public static final ContentLocationService Instance = new ContentLocationService();
+
+    static final Property pageStart = ResourceFactory.createProperty(AppConstants.BDO+"contentLocationPage");
+    static final Property pageEnd = ResourceFactory.createProperty(AppConstants.BDO+"contentLocationEndPage");
+    static final Property volumeStart = ResourceFactory.createProperty(AppConstants.BDO+"contentLocationVolume");
+    static final Property volumeEnd = ResourceFactory.createProperty(AppConstants.BDO+"contentLocationEndVolume");
+    static final Property clInstance = ResourceFactory.createProperty(AppConstants.BDO+"contentLocationInstance");
+
+    final Integer getVal(final Resource s, final Property p) {
+        Statement st = s.getProperty(p);
+        if (st == null)
+            return null;
+        return st.getInt();
+    }
+
+    @Override
+    public final List<ContentLocation> getFromApi(final String resQname) throws IIIFException {
+        final String uri = Models.BDR + resQname.substring(4);
+        final String sparqlStr = "construct { ?cls ?clp ?clo } where { <"+uri+"> <"+AppConstants.BDO+"contentLocation> ?cls . ?cls ?clp ?clo . }";
+        final Query q = QueryFactory.create(sparqlStr);
+        final QueryExecution qe = QueryExecution.service(Application.getProperty("fusekiUrl")).query(q).build();
+        final Model clm = qe.execConstruct();
+        if (clm.isEmpty()) {
+            logger.info("no content location found for {}", resQname);
+            qe.close();
+            return null;
+        }
+        final List<ContentLocation> cll = new ArrayList<>();
+        final ResIterator cli = clm.listSubjects();
+        while (cli.hasNext()) {
+            final Resource cl = cli.next();
+            final Resource clInst = cl.getPropertyResourceValue(clInstance);
+            final ContentLocation clo = new ContentLocation(clInst, getVal(cl, volumeStart), getVal(cl, volumeEnd), getVal(cl, pageStart), getVal(cl, pageEnd));
+            cll.add(clo);
+        }
+        cll.sort(null);
+        qe.close();
+        return cll;
+    }
+
+    ContentLocationService() {
+        super("contentlocation", AppConstants.CACHEPREFIX_CL);
+    }
+
+}
diff --git a/src/main/java/io/bdrc/iiif/model/ContentLocation.java b/src/main/java/io/bdrc/iiif/model/ContentLocation.java
@@ -0,0 +1,48 @@
+package io.bdrc.iiif.model;
+
+import java.util.Comparator;
+
+import org.apache.jena.rdf.model.Resource;
+
+import io.bdrc.iiif.resolver.AppConstants;
+
+public class ContentLocation implements Comparator<ContentLocation> {
+    public final int vol_start;
+    public final int vol_end;
+    public final Integer page_start;
+    public final Integer page_end;
+    public final String iiQname;
+
+    public ContentLocation(final Resource inst, final Integer vol_start, final Integer vol_end, final Integer page_start, final Integer page_end) {
+        this.page_start = page_start;
+        this.page_end = page_end;
+        if (vol_start == null || vol_start < 1) {
+            this.vol_start = 1;
+        } else {
+            this.vol_start = vol_start;
+        }
+        if (vol_end == null || vol_end < this.vol_start) {
+            this.vol_end = this.vol_start;
+        } else {
+            this.vol_end = vol_end;
+        }
+        if (inst.getURI().startsWith(AppConstants.BDR)) {
+            this.iiQname = "bdr:"+inst.getURI().substring(AppConstants.BDR_len);
+        } else {
+            this.iiQname = null;
+        }
+    }
+
+    @Override
+    public final int compare(final ContentLocation o1, final ContentLocation o2) {
+        if (!o1.iiQname.equals(o2))
+            return o1.iiQname.compareTo(o2.iiQname);
+        if (o1.vol_start != o2.vol_start)
+            return Integer.compare(o1.vol_start, o2.vol_start);
+        if (o1.vol_end != o2.vol_end)
+            return Integer.compare(o1.vol_end, o2.vol_end);
+        if (o1.page_start != o2.page_start)
+            return Integer.compare(o1.page_start, o2.page_start);
+        return Integer.compare(o1.page_end, o2.page_end);
+    }
+}