Add IdBasedSearchFetcher to jstor

src/main/java/org/jabref/logic/importer/WebFetchers.java

@@ -127,6 +127,7 @@ public static SortedSet<IdBasedFetcher> getIdBasedFetchers(ImportFormatPreferenc
         set.add(new IacrEprintFetcher(importFormatPreferences));
         set.add(new RfcFetcher(importFormatPreferences));
         set.add(new Medra());
+        set.add(new JstorFetcher(importFormatPreferences));
         return set;
     }
 

src/main/java/org/jabref/logic/importer/fetcher/JstorFetcher.java

@@ -10,6 +10,7 @@
 
 import org.jabref.logic.importer.FetcherException;
 import org.jabref.logic.importer.FulltextFetcher;
+import org.jabref.logic.importer.IdBasedParserFetcher;
 import org.jabref.logic.importer.ImportFormatPreferences;
 import org.jabref.logic.importer.ParseException;
 import org.jabref.logic.importer.Parser;
@@ -28,11 +29,12 @@
 /**
  * Fetcher for jstor.org
  **/
-public class JstorFetcher implements SearchBasedParserFetcher, FulltextFetcher {
+public class JstorFetcher implements SearchBasedParserFetcher, FulltextFetcher, IdBasedParserFetcher {
 
     private static final String HOST = "https://www.jstor.org";
     private static final String SEARCH_HOST = HOST + "/open/search";
-    private static final String CITE_HOST = HOST + "/citation/text";
+    private static final String CITE_HOST = HOST + "/citation/text/";
+    private static final String URL_QUERY_REGEX = "(?<=\\?).*";
 
     private final ImportFormatPreferences importFormatPreferences;
 
@@ -82,6 +84,46 @@ public URL getURLForQuery(ComplexSearchQuery query) throws URISyntaxException, M
         return uriBuilder.build().toURL();
     }
 
+    @Override
+    public URL getUrlForIdentifier(String identifier) throws FetcherException {
+        String start = "https://www.jstor.org/citation/text/";
+        if (identifier.startsWith("http")) {
+            identifier = identifier.replace("https://www.jstor.org/stable", "");
+            identifier = identifier.replace("http://www.jstor.org/stable", "");
+        }
+        identifier = identifier.replaceAll(URL_QUERY_REGEX, "");
+
+        try {
+            if (identifier.contains("/")) {
+                // if identifier links to a entry with a valid doi
+                return new URL(start + identifier);
+            }
+            // else use default doi start.
+            return new URL(start + "10.2307/" + identifier);
+        } catch (IOException e) {
+            throw new FetcherException("could not construct url for jstor", e);
+        }
+    }
+
+    // overwriting default behaviour as that seems to always results in a 403
+    @Override
+    public Optional<BibEntry> performSearchById(String identifier) throws FetcherException {
+        if (identifier.isBlank()) {
+            return Optional.empty();
+        }
+        BibtexParser parser = new BibtexParser(importFormatPreferences, new DummyFileUpdateMonitor());
+        List<BibEntry> entries = null;
+        try {
+            entries = parser.parseEntries(getUrlForIdentifier(identifier).openStream());
+        } catch (ParseException | IOException e) {
+            e.printStackTrace();
+        }
+        if (entries == null || entries.size() != 1) {
+            return Optional.empty();
+        }
+        return Optional.of(entries.get(0));
+    }
+
     @Override
     public Parser getParser() {
         return inputStream -> {
@@ -111,7 +153,7 @@ public String getName() {
     }
 
     @Override
-    public Optional<URL> findFullText(BibEntry entry) throws IOException, FetcherException {
+    public Optional<URL> findFullText(BibEntry entry) throws IOException {
         if (entry.getField(StandardField.URL).isEmpty()) {
             return Optional.empty();
         }
@@ -133,4 +175,9 @@ public Optional<URL> findFullText(BibEntry entry) throws IOException, FetcherExc
     public TrustLevel getTrustLevel() {
         return TrustLevel.META_SEARCH;
     }
+
+    @Override
+    public void doPostCleanup(BibEntry entry) {
+        // do nothing
+    }
 }

src/test/java/org/jabref/logic/importer/fetcher/JstorFetcherTest.java

@@ -40,12 +40,32 @@ public class JstorFetcherTest implements SearchBasedFetcherCapabilityTest {
             .withField(StandardField.URL, "http://www.jstor.org/stable/90002164")
             .withField(StandardField.YEAR, "2017");
 
+    private final BibEntry doiEntry = new BibEntry(StandardEntryType.Article)
+            .withCitationKey("10.1086/501484")
+            .withField(StandardField.AUTHOR, "Johnmarshall Reeve")
+            .withField(StandardField.TITLE, "Teachers as Facilitators: What Autonomy‐Supportive Teachers Do and Why Their Students Benefit")
+            .withField(StandardField.ISSN, "{00135984, 15548279")
+            .withField(StandardField.JOURNAL, "The Elementary School Journal")
+            .withField(StandardField.ABSTRACT, "Abstract Students are sometimes proactive and engaged in classroom learning activities, but they are also sometimes only reactive and passive. Recognizing this, in this article I argue that students’ classroom engagement depends, in part, on the supportive quality of the classroom climate in which they learn. According to the dialectical framework within self‐determination theory, students possess inner motivational resources that classroom conditions can support or frustrate. When teachers find ways to nurture these inner resources, they adopt an autonomy‐supportive motivating style. After articulating what autonomy‐supportive teachers say and do during instruction, I discuss 3 points: teachers can learn how to be more autonomy supportive toward students; teachers most engage students when they offer high levels of both autonomy support and structure; and an autonomy‐supportive motivating style is an important element to a high‐quality teacher‐student relationship.")
+            .withField(StandardField.PUBLISHER, "The University of Chicago Press")
+            .withField(StandardField.NUMBER, "3")
+            .withField(StandardField.PAGES, "225--236")
+            .withField(StandardField.VOLUME, "106")
+            .withField(StandardField.URL, "http://www.jstor.org/stable/10.1086/501484")
+            .withField(StandardField.YEAR, "2006");
+
     @Test
     void searchByTitle() throws Exception {
         List<BibEntry> entries = fetcher.performSearch("title: \"Test Anxiety Analysis of Chinese College Students in Computer-based Spoken English Test\"");
         assertEquals(Collections.singletonList(bibEntry), entries);
     }
 
+    @Test
+    void searchById() throws FetcherException {
+        assertEquals(Optional.of(bibEntry), fetcher.performSearchById("90002164"));
+        assertEquals(Optional.of(doiEntry), fetcher.performSearchById("https://www.jstor.org/stable/10.1086/501484?seq=1"));
+    }
+
     @Test
     void fetchPDF() throws IOException, FetcherException {
         Optional<URL> url = fetcher.findFullText(bibEntry);