issue #14, #15; addition of clone api, and jitpack yml file to assist…

jitpack.yml

@@ -0,0 +1,4 @@
+jdk:
+  - openjdk11
+install:
+  - mvn clean install -DskipTests

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>com.tidesdb</groupId>
     <artifactId>tidesdb-java</artifactId>
-    <version>0.4.0</version>
+    <version>0.5.0</version>
     <packaging>jar</packaging>
 
     <name>TidesDB Java</name>

src/main/c/com_tidesdb_TidesDB.c

@@ -398,6 +398,38 @@ JNIEXPORT void JNICALL Java_com_tidesdb_TidesDB_nativeRenameColumnFamily(JNIEnv
     }
 }
 
+JNIEXPORT void JNICALL Java_com_tidesdb_TidesDB_nativeCloneColumnFamily(JNIEnv *env, jclass cls,
+                                                                        jlong handle,
+                                                                        jstring sourceName,
+                                                                        jstring destName)
+{
+    tidesdb_t *db = (tidesdb_t *)(uintptr_t)handle;
+    const char *srcCfName = (*env)->GetStringUTFChars(env, sourceName, NULL);
+    if (srcCfName == NULL)
+    {
+        throwTidesDBException(env, TDB_ERR_MEMORY, "Failed to get source column family name");
+        return;
+    }
+
+    const char *dstCfName = (*env)->GetStringUTFChars(env, destName, NULL);
+    if (dstCfName == NULL)
+    {
+        (*env)->ReleaseStringUTFChars(env, sourceName, srcCfName);
+        throwTidesDBException(env, TDB_ERR_MEMORY, "Failed to get destination column family name");
+        return;
+    }
+
+    int result = tidesdb_clone_column_family(db, srcCfName, dstCfName);
+
+    (*env)->ReleaseStringUTFChars(env, sourceName, srcCfName);
+    (*env)->ReleaseStringUTFChars(env, destName, dstCfName);
+
+    if (result != TDB_SUCCESS)
+    {
+        throwTidesDBException(env, result, getErrorMessage(result));
+    }
+}
+
 JNIEXPORT jobject JNICALL Java_com_tidesdb_ColumnFamily_nativeGetStats(JNIEnv *env, jclass cls,
                                                                        jlong handle)
 {

src/main/java/com/tidesdb/TidesDB.java

@@ -247,6 +247,26 @@ public void renameColumnFamily(String oldName, String newName) throws TidesDBExc
         nativeRenameColumnFamily(nativeHandle, oldName, newName);
     }
 
+    /**
+     * Creates a complete copy of an existing column family with a new name.
+     * The clone contains all the data from the source at the time of cloning.
+     * The clone is completely independent - modifications to one do not affect the other.
+     *
+     * @param sourceName the source column family name
+     * @param destName the destination column family name
+     * @throws TidesDBException if the clone fails
+     */
+    public void cloneColumnFamily(String sourceName, String destName) throws TidesDBException {
+        checkNotClosed();
+        if (sourceName == null || sourceName.isEmpty()) {
+            throw new IllegalArgumentException("Source column family name cannot be null or empty");
+        }
+        if (destName == null || destName.isEmpty()) {
+            throw new IllegalArgumentException("Destination column family name cannot be null or empty");
+        }
+        nativeCloneColumnFamily(nativeHandle, sourceName, destName);
+    }
+
     private void checkNotClosed() {
         if (closed) {
             throw new IllegalStateException("TidesDB instance is closed");
@@ -288,4 +308,6 @@ private static native void nativeCreateColumnFamily(long handle, String name,
     private static native void nativeBackup(long handle, String dir) throws TidesDBException;
 
     private static native void nativeRenameColumnFamily(long handle, String oldName, String newName) throws TidesDBException;
+
+    private static native void nativeCloneColumnFamily(long handle, String sourceName, String destName) throws TidesDBException;
 }

src/test/java/com/tidesdb/TidesDBTest.java

@@ -556,6 +556,64 @@ void testBtreeIterator() throws TidesDBException {
 
     @Test
     @Order(15)
+    void testCloneColumnFamily() throws TidesDBException {
+        Config config = Config.builder(tempDir.resolve("testdb15").toString())
+            .numFlushThreads(2)
+            .numCompactionThreads(2)
+            .logLevel(LogLevel.INFO)
+            .blockCacheSize(64 * 1024 * 1024)
+            .maxOpenSSTables(256)
+            .build();
+
+        try (TidesDB db = TidesDB.open(config)) {
+            ColumnFamilyConfig cfConfig = ColumnFamilyConfig.defaultConfig();
+            db.createColumnFamily("source_cf", cfConfig);
+
+            ColumnFamily sourceCf = db.getColumnFamily("source_cf");
+
+            // Insert data into source
+            try (Transaction txn = db.beginTransaction()) {
+                for (int i = 0; i < 10; i++) {
+                    txn.put(sourceCf, ("key" + i).getBytes(), ("value" + i).getBytes());
+                }
+                txn.commit();
+            }
+
+            // Clone the column family
+            db.cloneColumnFamily("source_cf", "cloned_cf");
+
+            // Verify clone exists
+            ColumnFamily clonedCf = db.getColumnFamily("cloned_cf");
+            assertNotNull(clonedCf);
+            assertEquals("cloned_cf", clonedCf.getName());
+
+            // Verify both column families are listed
+            String[] families = db.listColumnFamilies();
+            assertTrue(families.length >= 2);
+
+            // Verify data exists in clone
+            try (Transaction txn = db.beginTransaction()) {
+                for (int i = 0; i < 10; i++) {
+                    byte[] result = txn.get(clonedCf, ("key" + i).getBytes());
+                    assertNotNull(result);
+                    assertArrayEquals(("value" + i).getBytes(), result);
+                }
+            }
+
+            // Verify independence: insert into clone, should not appear in source
+            try (Transaction txn = db.beginTransaction()) {
+                txn.put(clonedCf, "clone_only_key".getBytes(), "clone_only_value".getBytes());
+                txn.commit();
+            }
+
+            try (Transaction txn = db.beginTransaction()) {
+                assertThrows(TidesDBException.class, () -> txn.get(sourceCf, "clone_only_key".getBytes()));
+            }
+        }
+    }
+
+    @Test
+    @Order(16)
     void testTransactionPutGetDeleteBadKey() throws TidesDBException {
         Config config = Config.builder(tempDir.resolve("testdb3").toString())
                 .numFlushThreads(2)