how to create custom object type using Java OpenCmis?

[limp]

Is it posible to create custom object type in alfreco (community - 5.2.0) using openCmis (version 1.1)?
I tried creating subtype of cmis:document, but it throws CmisNotSupportedException.

I used this method:
org.apache.chemistry.opencmis.commons.definitions.DocumentTypeDefinition dtd = createDocumentTypeDef();
org.apache.chemistry.opencmis.client.api.Session.createType(dtd);

[afaust · Accepted solution]

As the error indicates, Alfresco does not support dynamically creating new types via the CMIS API.