fix HtmlCodeBookExporter

src/main/java/edu/harvard/iq/dataverse/export/HtmlCodeBookExporter.java

@@ -0,0 +1,84 @@
+package edu.harvard.iq.dataverse.export;
+
+import com.google.auto.service.AutoService;
+import edu.harvard.iq.dataverse.DatasetVersion;
+import edu.harvard.iq.dataverse.export.ddi.DdiExportUtil;
+import edu.harvard.iq.dataverse.export.spi.Exporter;
+import edu.harvard.iq.dataverse.util.BundleUtil;
+
+import javax.json.JsonObject;
+import javax.ws.rs.core.MediaType;
+import javax.xml.stream.XMLStreamException;
+import java.io.File;
+import java.io.OutputStream;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+@AutoService(Exporter.class)
+public class HtmlCodeBookExporter implements Exporter {
+
+    @Override
+    public String getProviderName() {
+        return "html";
+    }
+
+    @Override
+    public String getDisplayName() {
+        return  BundleUtil.getStringFromBundle("dataset.exportBtn.itemLabel.html") != null ? BundleUtil.getStringFromBundle("dataset.exportBtn.itemLabel.html") : "DDI html codebook";
+    }
+
+    @Override
+    public void exportDataset(DatasetVersion version, JsonObject json, OutputStream outputStream) throws ExportException {
+        try {
+            Path cachedMetadataFilePath = Paths.get(version.getDataset().getFileSystemDirectory().toString(), "export_ddi" + ".cached");
+            File datafile = cachedMetadataFilePath.toFile();
+            DdiExportUtil.datasetHtmlDDI(datafile, outputStream);
+        } catch (XMLStreamException xse) {
+            throw new ExportException ("Caught XMLStreamException performing DDI export");
+        }
+    }
+
+    @Override
+    public Boolean isXMLFormat() {
+        return false;
+    }
+
+    @Override
+    public Boolean isHarvestable() {
+        // No, we don't want this format to be harvested!
+        // For datasets with tabular data the <data> portions of the DDIs
+        // become huge and expensive to parse; even as they don't contain any
+        // metadata useful to remote harvesters. -- L.A. 4.5
+        return false;
+    }
+
+    @Override
+    public Boolean isAvailableToUsers() {
+        return true;
+    }
+
+    @Override
+    public String getXMLNameSpace() throws ExportException {
+        return null;
+    }
+
+    @Override
+    public String getXMLSchemaLocation() throws ExportException {
+        return null;
+    }
+
+    @Override
+    public String getXMLSchemaVersion() throws ExportException {
+        return null;
+    }
+
+    @Override
+    public void setParam(String name, Object value) {
+        // this exporter does not uses or supports any parameters as of now.
+    }
+
+    @Override
+    public String  getMediaType() {
+        return MediaType.TEXT_HTML;
+    };
+}