How can I get both Folders and Documents with one Cmis query

Question

By using Apache Cmis query, if I understand correctly, you can get either

1. a List of Cmis Folders (SELECT * FROM cmis:folder WHERE...)
2. a List of Cmis Documents (SELECT * FROM cmis:document WHERE...)

But what I need, is a List of cmisObjects. I need this abstraction, because I want to get all the children (Folder or Document) of the selected Parent Folder.

Using 2 queries (1 for each type) is not an option, as I also have to use paging (using OperationContext.setMaxItemsPerPage) over the query results

EDIT : Just to make sure I made myself clear, I need to

1. Use the query Function, as I need to filter my results by using a specific custom aspect
2. Use Pagination, because even after filtering, the results (Folder Children) can be up to hundreds

Answer 1

This one has hit me years ago (I gave up on CMIS at that time). As of CMIS 1.1, there is this optional cmis:item. Have a look at http://docs.oasis-open.org/cmis/CMIS/v1.1/CMIS-v1.1.html#x1-220002 . You may be lucky and find that working with Alfresco. It might be required to use the v.1.1 implementation of the spec.

If that does not work, I guess your only option is to abondon CMIS for this query and either use another search service or roll your own.

Good luck ! ;)

Answer 2

If you know your parent, why don't you just call getChildren on the parent? Do you really have to use a query?

http://chemistry.apache.org/java/0.9.0/maven/apidocs/org/apache/chemistry/opencmis/client/api/Folder.html#getChildren()