Make it possible to use the CONTAINS predicate on non-default fulltext indexes

Nuxeo offers several configurable fulltext indexes:

• defaul that aggregates all text data related to a given document (text fields and binary text extractions)
• title that indexes only the tokens from the dc:title field
• other administrator defined indexes in default-repository-config.xml

Nuxeo services might want to use the CMIS query maker to able to perform JOIN queries on the repository while filtering on such custom indexes. The proposed change is to make the CMISQueryMaker microparse the prefix of the text passed as argument to the CONTAINS predicate to select the right index in Nuxeo without having to change the grammar of the CMIS SQL language.

Hence SELECT dc:title FROM cmis:document WHERE CONTAINS('nx:title:some tokens to search for') will restrict the search to the "title" custom index, while SELECT dc:title FROM cmis:document WHERE CONTAINS('some tokens to search for') will use the "default" fulltext index.