How to import profile with Java ?

Hi all,

I try to import profiles with Java (before porting it to Python) and it didn't work.

I use the following code :
CommandAPI commandAPI = TenantAPIAccessor.getCommandAPI(apiSession);
byte[] profilesImport = Files.readAllBytes(Paths.get("../release/Profile_Data.xml"));
String profiles = new String(profilesImport);
Map<String,Serializable> parameters = new HashMap<>();
parameters.put("xmlContent", profiles.getBytes());
System.out.println("### Import profiles");
Serializable result = commandAPI.execute("importProfilesCommand", parameters);
System.out.println(result);

To upload an xml file which has just been exported from another Bonita instance and contains several profiles:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<profiles:profiles xmlns:profiles="http://www.bonitasoft.org/ns/profile/6.1">
<profile name="BU" isDefault="false">
<description>Chargé des études </description>
<profileEntries/>
<profileMapping>
<users>
<user>...</user>
...

The output looks like this:
[]
(raw output from the logs:
- client-side:
11:21:52.228 [main] DEBUG org.apache.http.headers - << HTTP/1.1 200 OK
11:21:52.228 [main] DEBUG org.apache.http.headers - << Server: Apache-Coyote/1.1
11:21:52.228 [main] DEBUG org.apache.http.headers - << Content-Type: application/json;charset=UTF-8
11:21:52.228 [main] DEBUG org.apache.http.headers - << Transfer-Encoding: chunked
11:21:52.228 [main] DEBUG org.apache.http.headers - << Date: Tue, 12 Sep 2017 09:21:51 GMT
11:21:52.228 [main] DEBUG org.apache.http.impl.client.DefaultHttpClient - Connection can be kept alive indefinitely
11:21:52.228 [main] DEBUG org.apache.http.wire - << "2a[\r][\n]"
11:21:52.228 [main] DEBUG org.apache.http.wire - << "<object-stream>[\n]"
11:21:52.228 [main] DEBUG org.apache.http.wire - << " <list/>[\n]"
11:21:52.228 [main] DEBUG org.apache.http.wire - << "</object-stream>"
- server side:
2017-09-12 09:21:51.769 +0000 FINEST: com.bonitasoft.engine.api.impl.ServerAPIExt THREAD_ID=43 | HOSTNAME=ip-10-196-76-232 | TENANT_ID=1 | End Server API call org.bonitasoft.engine.api.CommandAPI execute
)
And the profiles are not loaded, there is only the default ones after this command:
mysql> select * from profile;
+----------+-----+-----------+-----------------+------------------------------------------------------------------------------------------------------------------------------+---------------+-----------+----------------+---------------+
| tenantId | id | isDefault | name | description | creationDate | createdBy | lastUpdateDate | lastUpdatedBy |
+----------+-----+-----------+-----------------+------------------------------------------------------------------------------------------------------------------------------+---------------+-----------+----------------+---------------+
| 1 | 110 | 1 | Administrator | The administrator can install a process, manage the organization, and handle some errors (for example, by replaying a task). | 1505208111599 | -1 | 1505208111599 | -1 |
| 1 | 111 | 1 | Process manager | The Process manager can supervise designated processes, and manage cases and tasks of those processes. | 1505208111646 | -1 | 1505208111646 | -1 |
| 1 | 112 | 1 | User | The user can view and perform tasks and can start a new case of a process. | 1505208111657 | -1 | 1505208111657 | -1 |
+----------+-----+-----------+-----------------+------------------------------------------------------------------------------------------------------------------------------+---------------+-----------+----------------+---------------+

So could someone enlighten me on what is missing in my code ?

Thanks in advance for any hint,
Best regards,
Ludo