fix BytesCodec encode for bool, float, double

Author: brokkoli71

src/main/java/dev/zarr/zarrjava/core/codec/core/BytesCodec.java

@@ -2,9 +2,7 @@
 
 import com.fasterxml.jackson.annotation.JsonValue;
 import dev.zarr.zarrjava.core.codec.ArrayBytesCodec;
-import ucar.ma2.Array;
-import ucar.ma2.DataType;
-import ucar.ma2.Index;
+import ucar.ma2.*;
 
 import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
@@ -34,9 +32,44 @@ public Array decode(ByteBuffer chunkBytes) {
 }
     @Override
     public ByteBuffer encode(Array chunkArray) {
-        return chunkArray.getDataAsByteBuffer(getByteOrder());
-    }
+        ByteOrder order = getByteOrder();
+
+        // Boolean
+        if (chunkArray instanceof ArrayBoolean) {
+            boolean[] data = (boolean[]) chunkArray.copyTo1DJavaArray();
+            ByteBuffer bb = ByteBuffer.allocate(data.length);
+            for (boolean b : data) {
+                bb.put((byte) (b ? 1 : 0));
+            }
+            bb.flip();
+            return bb;
+        }
 
+        // Float32
+        if (chunkArray instanceof ArrayFloat) {
+            float[] data = (float[]) chunkArray.copyTo1DJavaArray();
+            ByteBuffer bb = ByteBuffer.allocate(data.length * Float.BYTES).order(order);
+            for (float f : data) {
+                bb.putFloat(f);
+            }
+            bb.flip();
+            return bb;
+        }
+
+        // Float64
+        if (chunkArray instanceof ArrayDouble) {
+            double[] data = (double[]) chunkArray.copyTo1DJavaArray();
+            ByteBuffer bb = ByteBuffer.allocate(data.length * Double.BYTES).order(order);
+            for (double d : data) {
+                bb.putDouble(d);
+            }
+            bb.flip();
+            return bb;
+        }
+
+    // All other primitive types (byte, short, int, long, char)
+    return chunkArray.getDataAsByteBuffer(order);
+}
     public enum Endian {
         LITTLE("little"),
         BIG("big");