mit Arbeit an DCAT-AP.de Export begonnen

pom.xml

@@ -83,7 +83,11 @@
             <artifactId>font-awesome</artifactId>
             <version>4.7.0</version>
         </dependency>
-
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-text</artifactId>
+            <version>1.8</version>
+        </dependency>
     </dependencies>
 
     <build>

src/main/java/de/landsh/opendata/uploadform/controller/DcatController.java

+package de.landsh.opendata.uploadform.controller;
+
+import de.landsh.opendata.uploadform.model.Dataset;
+import de.landsh.opendata.uploadform.model.DatasetMatrix;
+import de.landsh.opendata.uploadform.services.DatasetService;
+import lombok.RequiredArgsConstructor;
+import org.apache.commons.text.StringEscapeUtils;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+import java.util.List;
+
+@Controller
+@RequiredArgsConstructor
+public class DcatController {
+
+    private final DatasetService datasetService;
+
+    @GetMapping("/catalog.xml")
+    @ResponseBody
+    public String catalogXML() {
+        StringBuilder sb = new StringBuilder();
+
+        sb.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" +
+                "<rdf:RDF\n" +
+                "  xmlns:foaf=\"http://xmlns.com/foaf/0.1/\"\n" +
+                "  xmlns:spdx=\"http://spdx.org/rdf/terms#\"\n" +
+                "  xmlns:locn=\"http://www.w3.org/ns/locn#\"\n" +
+                "  xmlns:hydra=\"http://www.w3.org/ns/hydra/core#\"\n" +
+                "  xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\"\n" +
+                "  xmlns:dcat=\"http://www.w3.org/ns/dcat#\"\n" +
+                "  xmlns:dct=\"http://purl.org/dc/terms/\"\n" +
+                "  xmlns:dcatde=\"http://dcat-ap.de/def/dcatde/\"\n" +
+                "  xmlns:skos=\"http://www.w3.org/2004/02/skos/core#\"\n" +
+                "  xmlns:schema=\"http://schema.org/\"\n" +
+                "  <dcat:Catalog rdf:about=\"https://opendata.schleswig-holstein.de/upload/\">\n");
+
+        List<Dataset> datasetList = datasetService.findAll(1, 100);
+        for (Dataset dataset : datasetList) {
+            if( dataset.getUploadDate() != null) {
+                sb.append(toDcat(dataset));
+            }
+        }
+
+        sb.append("</dcat:Catalog></rdf:RDF>\n");
+
+        return sb.toString();
+    }
+
+     String toDcat(Dataset dataset) {
+        final DatasetMatrix dm = dataset.getDatasetMatrix();
+        final StringBuilder sb = new StringBuilder();
+        sb.append("<dcat:dataset>\n");
+        sb.append("<dcat:Dataset rdf:about=\"https://opendata.schleswig-holstein.de/upload/dataset/");
+        sb.append(dataset.getId());
+        sb.append("\">\n");
+
+        sb.append("<dct:title>").append(StringEscapeUtils.escapeXml11( dm.getTitle())).append("</dct:title>\n");
+        sb.append("<dct:description>").append(StringEscapeUtils.escapeXml11( dm.getDescription())).append("</dct:description>\n");
+        
+
+        sb.append("</dcat:Dataset>\n");
+        sb.append("</dcat:dataset>\n");
+
+        return sb.toString();
+    }
+}

src/test/java/de/landsh/opendata/uploadform/controller/DcatControllerTest.java

+package de.landsh.opendata.uploadform.controller;
+
+import de.landsh.opendata.uploadform.model.Dataset;
+import de.landsh.opendata.uploadform.model.DatasetMatrix;
+import de.landsh.opendata.uploadform.services.DatasetService;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.mock.mockito.MockBean;
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
+import org.xml.sax.helpers.DefaultHandler;
+
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.parsers.SAXParser;
+import javax.xml.parsers.SAXParserFactory;
+import java.io.IOException;
+import java.io.StringReader;
+
+class DcatControllerTest {
+
+    private DcatController controller;
+
+    @MockBean
+    private DatasetService datasetService;
+
+    @BeforeEach
+    public void setUp() {
+        controller = new DcatController(datasetService);
+    }
+
+    @Test
+    void toDcat() throws ParserConfigurationException, SAXException, IOException {
+        DatasetMatrix datasetMatrix = new DatasetMatrix();
+        datasetMatrix.setId("vornamen");
+        datasetMatrix.setTitle("Vornamen");
+        datasetMatrix.setDescription("Die Vornamensstatistik ... siehe https://example.org?a=1&b=2");
+
+        Dataset dataset = new Dataset();
+        dataset.setId(1L);
+        dataset.setDatasetMatrix(datasetMatrix);
+        dataset.setOrganization("010585890");  // Amt Hüttener Berge
+        dataset.setYear(2021);
+
+        String result = controller.toDcat(dataset);
+
+        // assert that XML is well-formed
+        final SAXParser parser = SAXParserFactory.newInstance().newSAXParser();
+        parser.parse(new InputSource(new StringReader(result)), new DefaultHandler());
+
+    }
+}