nhibernate - Is it possible to create ICriteria/ICriterion from LINQ or HQL? -

i creating method can create filter understood nhibernate (by filter mean set of icriteria object example) abstract filter object.

public static ienumerable<icriterion> tonhcriteria(this mycriteria criteria) {    // t4 generated function    // lots of result.add(expression.or(expression.eq(),expression.eq)) expression trees - hard generate    // there way generate hql/linq query here istead? } 

then want like

session.createcriteria<entity>().add(mycriteria.tonhcriteria()) 

to filter entities. problem using expression. methods (expression.or etc) quite tedious (the method generated , have multiple or statements have joined expression somehow). there way avoid using expression.or() , create icrietrion / icriteria using linq or hql?

hey, did check out this question? shows going linq nhibernate multicriteria (and on way transforms linq query icriteria)