Fix could not connect to LO on Mac OSX

CHANGELOG.md

@@ -42,9 +42,10 @@ Note that this project **does not** adhere to [Semantic Versioning](http://semve
 - We fixed the failure to Copy citation key and link. [#5835](https://github.com/JabRef/jabref/issues/5835)
 - We fixed an issue where the sort order of the entry table was reset after a restart of JabRef. [#6898](https://github.com/JabRef/jabref/pull/6898)
 - We fixed an issue where no longer a warning was displayed when inserting references into LibreOffice with an invalid "ReferenceParagraphFormat". [#6907](https://github.com/JabRef/jabref/pull/60907).
-- We fixed an issue where a selected field was not removed after the first click in the custom entry types dialog [#6934](https://github.com/JabRef/jabref/issues/6934)
-- We fixed an issue where a remove icon was shown for standard entry types in the custom entry types dialog [6906](https://github.com/JabRef/jabref/issues/6906)
-- We fixed an issue with the python script used by browser plugins that failed to locate JabRef if not installed in its default location.
+- We fixed an issue where a selected field was not removed after the first click in the custom entry types dialog. [#6934](https://github.com/JabRef/jabref/issues/6934)
+- We fixed an issue where a remove icon was shown for standard entry types in the custom entry types dialog. [6906](https://github.com/JabRef/jabref/issues/6906)
+- We fixed an issue where it was impossible to connect to OpenOffice/LibreOffice on Mac OSX. [#6970](https://github.com/JabRef/jabref/pull/6970)
+- We fixed an issue with the python script used by browser plugins that failed to locate JabRef if not installed in its default location. [#6963](https://github.com/JabRef/jabref/pull/6963/files)
 
 ### Removed
 

src/main/java/org/jabref/gui/openoffice/OpenOfficePanel.java

@@ -48,6 +48,7 @@
 import org.jabref.logic.openoffice.OpenOfficePreferences;
 import org.jabref.logic.openoffice.StyleLoader;
 import org.jabref.logic.openoffice.UndefinedParagraphFormatException;
+import org.jabref.logic.util.OS;
 import org.jabref.logic.util.io.FileUtil;
 import org.jabref.model.database.BibDatabase;
 import org.jabref.model.database.BibDatabaseContext;
@@ -430,9 +431,13 @@ private List<URL> findOpenOfficeJars(Path configurationPath) throws IOException
             throw new IOException("(Not all) required Open Office Jars were found inside installation path. Searched for " + OpenOfficePreferences.OO_JARS + " in " + configurationPath);
         }
 
-        List<URL> jarURLs = new ArrayList<>(OpenOfficePreferences.OO_JARS.size());
+        List<URL> jarURLs = new ArrayList<>(OpenOfficePreferences.OO_JARS.size() + 1);
         for (Optional<Path> jarPath : filePaths) {
             jarURLs.add((jarPath.get().toUri().toURL()));
+            // For Mac OSX we need to add the "Contents/MacOS", because otherwise we cannot connect to LO
+            if (OS.OS_X) {
+                jarURLs.add(configurationPath.resolve("Contents/MacOS/").toUri().toURL());
+            }
         }
         return jarURLs;
     }

src/main/java/org/jabref/logic/openoffice/OpenOfficeFileSearch.java

@@ -1,18 +1,27 @@
 package org.jabref.logic.openoffice;
 
-import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
 import java.nio.file.Path;
+import java.nio.file.attribute.BasicFileAttributes;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 import java.util.Locale;
+import java.util.function.BiPredicate;
 import java.util.stream.Collectors;
+import java.util.stream.Stream;
 
 import org.jabref.logic.util.OS;
 import org.jabref.logic.util.io.FileUtil;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 public class OpenOfficeFileSearch {
+    private static final Logger LOGGER = LoggerFactory.getLogger(OpenOfficeFileSearch.class);
+
     /**
      * Detects existing installation of OpenOffice and LibreOffice.
      *
@@ -33,19 +42,18 @@ public static List<Path> detectInstallations() {
     }
 
     private static List<Path> findOpenOfficeDirectories(List<Path> programDirectories) {
-        List<Path> result = new ArrayList<>();
-
-        for (Path programDir : programDirectories) {
-            File[] subDirs = programDir.toFile().listFiles(File::isDirectory);
-            if (subDirs != null) {
-                for (File dir : subDirs) {
-                    if (dir.getPath().toLowerCase(Locale.ROOT).contains("openoffice") || dir.getPath().toLowerCase(Locale.ROOT).contains("libreoffice")) {
-                        result.add(dir.toPath());
-                    }
-                }
+
+        BiPredicate<Path, BasicFileAttributes> filePredicate = (path, attr) -> attr.isDirectory() && (path.toString().toLowerCase(Locale.ROOT).contains("openoffice")
+                                                                               || path.toString().toLowerCase(Locale.ROOT).contains("libreoffice"));
+
+        return programDirectories.stream().flatMap(dirs -> {
+            try {
+                return Files.find(dirs, 1, filePredicate);
+            } catch (IOException e) {
+                LOGGER.error("Problem searching for openoffice/libreoffice install directory", e);
+                return Stream.empty();
             }
-        }
-        return result;
+        }).collect(Collectors.toList());
     }
 
     private static List<Path> findWindowsOpenOfficeDirs() {