select ... from SettlementTask as rootAlias join rootAlias.linked as _linked left join _linked.extensions as _extensions with _extensions.class=com.walkaway.claim.domain.settlement.extension.i3.EwtAssessmentExtension 

left outer join claim_settlement_ext extensions7_ on settlement3_.id=extensions7_.settlement_id and (case when extensions7_1_.extension_id is not null then 1 when extensions7_2_.extension_id is not null then 2 when extensions7_3_.extension_id is not null then 3 when extensions7_4_.extension_id is not null then 4 when extensions7_5_.extension_id is not null then 5 when extensions7_6_.extension_id is not null then 6 when extensions7_.id is not null then 0 end=1) left outer join claim_settlement_ext_i3_ewt extensions7_1_ on extensions7_.id=extensions7_1_.extension_id left outer join claim_settlement_ext_walkaway_dr extensions7_2_ on extensions7_.id=extensions7_2_.extension_id left outer join claim_settlement_ext_walkaway_gap extensions7_3_ on extensions7_.id=extensions7_3_.extension_id left outer join claim_settlement_ext_walkaway_pr extensions7_4_ on extensions7_.id=extensions7_4_.extension_id left outer join claim_settlement_ext_walkaway_ccr extensions7_5_ on extensions7_.id=extensions7_5_.extension_id left outer join claim_settlement_ext_walkaway_vr extensions7_6_ on extensions7_.id=extensions7_6_.extension_id