jdb: Add countDocuments method

libraries/jdb/src/main/java/de/oliver/jdb/JDB.java

@@ -95,6 +95,26 @@ public class JDB {
         return documents;
     }
 
+    /**
+     * Counts the number of documents in the specified directory path.
+     *
+     * @param path the relative directory path
+     * @return the number of documents in the directory
+     */
+    public int countDocuments(@NotNull String path) {
+        File directory = new File(baseDirectory, path);
+        if (!directory.exists()) {
+            return 0;
+        }
+
+        File[] files = directory.listFiles();
+        if (files == null) {
+            return 0;
+        }
+
+        return files.length;
+    }
+
     /**
      * Saves the given value as a document at the specified path.
      *

libraries/jdb/src/test/java/de/oliver/jdb/JDBTest.java

@@ -110,6 +110,23 @@ public class JDBTest {
         assertTrue(result.isEmpty());
     }
 
+    @Test
+    public void testCountDocuments() throws IOException {
+        // Prepare
+        String basePath = "./test_files/";
+        JDB jdb = new JDB(basePath);
+        String path = "test_files";
+        jdb.set(path + "/obj1", "Test message 1");
+        jdb.set(path + "/obj2", "Test message 2");
+        jdb.set(path + "/obj3", "Test message 3");
+
+        // Act
+        int count = jdb.countDocuments(path);
+
+        // Assert
+        assertEquals(3, count);
+    }
+
     @Test
     public void testSetNewObject() throws IOException {
         // Prepare