[WIP] Extract PDF References

src/main/java/org/jabref/logic/importer/util/GrobidService.java

@@ -84,6 +84,25 @@ public List<BibEntry> processPDF(Path filePath, ImportFormatPreferences importFo
 
         String httpResponse = response.body();
 
+        return getBibEntries(importFormatPreferences, httpResponse);
+    }
+
+    public List<BibEntry> processReferences(Path filePath, ImportFormatPreferences importFormatPreferences) throws IOException, ParseException {
+        Connection.Response response = Jsoup.connect(grobidPreferences.getGrobidURL() + "/api/processReferences")
+                                            .header("Accept", MediaTypes.APPLICATION_BIBTEX)
+                                            .data("input", filePath.toString(), Files.newInputStream(filePath))
+                                            .data("consolidateCitations", String.valueOf(ConsolidateCitations.WITH_METADATA))
+                                            .method(Connection.Method.POST)
+                                            .ignoreContentType(true)
+                                            .timeout(20000)
+                                            .execute();
+
+        String httpResponse = response.body();
+
+        return getBibEntries(importFormatPreferences, httpResponse);
+    }
+
+    private static List<BibEntry> getBibEntries(ImportFormatPreferences importFormatPreferences, String httpResponse) throws IOException, ParseException {
         if (httpResponse == null || "@misc{-1,\n  author = {}\n}\n".equals(httpResponse)) { // This filters empty BibTeX entries
             throw new IOException("The GROBID server response does not contain anything.");
         }

src/test/java/org/jabref/logic/importer/util/GrobidServiceTest.java

@@ -4,6 +4,7 @@
 import java.net.URISyntaxException;
 import java.nio.file.Path;
 import java.util.List;
+import java.util.Objects;
 import java.util.Optional;
 
 import org.jabref.logic.importer.ImportFormatPreferences;
@@ -96,4 +97,22 @@ public void processPdfTest() throws IOException, ParseException, URISyntaxExcept
         assertEquals(Optional.of("Paper Title"), be0.getField(StandardField.TITLE));
         assertEquals(Optional.of("2014-10-05"), be0.getField(StandardField.DATE));
     }
+
+    @Test
+    public void extractsReferencesFromPdf() throws IOException, ParseException, URISyntaxException {
+        BibEntry ref1 = new BibEntry(StandardEntryType.Article)
+                .withField(StandardField.AUTHOR, "Kopp, O")
+                .withField(StandardField.ADDRESS, "Berlin; Heidelberg")
+                .withField(StandardField.DATE, "2013")
+                .withField(StandardField.JOURNAL, "LNCS")
+                .withField(StandardField.PAGES, "700--704")
+                .withField(StandardField.PUBLISHER, "Springer")
+                .withField(StandardField.TITLE, "Winery -A Modeling Tool for TOSCA-based Cloud Applications")
+                .withField(StandardField.VOLUME, "8274")
+                .withField(StandardField.YEAR, "2013");
+
+        Path file = Path.of(Objects.requireNonNull(PdfGrobidImporterTest.class.getResource("LNCS-minimal.pdf")).toURI());
+        List<BibEntry> extractedReferences = grobidService.processReferences(file, importFormatPreferences);
+        assertEquals(List.of(ref1), extractedReferences);
+    }
 }