How to migrate content from one alfresco repository to other using Open CMIS

I want to migrate all alfresco repository contents from one repository to other. but i don't want the existing folder structure. while migrating i have to validate the content according to some business requirement, and based on content type i have to create different folder structure in new repository.

Does any one did this previously. Please help.

Thanks in Advance...

Ok, the solution that i give is not the best one, but i think it will work, we will start with a simple document and see if it's working (we will modifie the answer)

Getting the inputStram of a document

I think it's the most important part

public InputStream getTheInputStream () {    
Document newDocument = (Document) getSession(serverURL, userName, password).getObject(path);
ContentStream cs = newDocument.getContentStream(null);
return cs.getStream();
}

Moving the inputStram from Server A to Server B

public void transfert() throws FileNotFoundException, IOException {
    Session sessionB = getSession(serverUrlB, usernameB, passwordB);

    ////////////////////////////  GET THE FOLDER THAT YOU WILL WORK WITH
    Folder root = sessionB.getRootFolder();
    ////////////////////////////  GET THE FOLDER THAT YOU WILL WORK WITH
    File newfile = new File(fileName);
    String nom = fileName;
    Map<String, Object> properties = new HashMap<>();
    properties.put(PropertyIds.OBJECT_TYPE_ID, BaseTypeId.CMIS_DOCUMENT.value());
    properties.put(PropertyIds.NAME, nom);
    List<Ace> addAces = new LinkedList<>();
    List<Ace> removeAces = new LinkedList<>();
    List<Policy> policies = new LinkedList<>();
    String extension = FilenameUtils.getExtension(nom);
    ContentStream contentStream = new ContentStreamImpl("content." + extension, BigInteger.valueOf(nom).length()),
            new MimetypesFileTypeMap().getContentType(newfile), (theInputStream);
    Document dc = root.createDocument(properties, contentStream, VersioningState.MAJOR, policies, addAces, removeAces, sessionB.getDefaultContext());        

}

Try this method and tell me if it's working, if you don't have the getSession method just look to this post get session method.