<?xml version="1.0"?>
<ccm:invariants 
    xmlns:ccm="http://xmlns.redhat.com/waf/london/invariants/1.0">

  <ccm:invariant description="All bundles have a type_id">
    <ccm:query expected="0">
select count(*) as result 
  from cms_items i, cms_bundles b 
 where i.item_id = b.bundle_id 
   and i.type_id is null
    </ccm:query>
  </ccm:invariant>

  <ccm:invariant description="All top level language instances have a type_id">
    <ccm:query expected="0">
select count(*) as result 
  from cms_items i, cms_pages p 
 where i.item_id = p.item_id 
   and i.type_id is null 
   and i.parent_id is not null
    </ccm:query>
  </ccm:invariant>

  <ccm:invariant description="All bundles have a section_id">
    <ccm:query expected="0">
select count(*) as result 
  from cms_items i, cms_bundles b 
 where i.item_id = b.bundle_id 
   and i.section_id is null
    </ccm:query>
  </ccm:invariant>

  <ccm:invariant description="All top level language instances have a section_id">
    <ccm:query expected="0">
select count(*) as result 
  from cms_items i, cms_pages p 
 where i.item_id = p.item_id 
   and i.section_id is null 
   and (i.parent_id is not null or i.type_id is not null)
    </ccm:query>
  </ccm:invariant>

  <ccm:invariant description="Parent of all language intances is a bundle">
    <ccm:query expected="0">
select count(*) as result
  from cms_items i, cms_pages p 
 where i.item_id = p.item_id 
   and i.parent_id is not null 
   and i.type_id is not null
   and not exists (select 1 from cms_bundles where bundle_id = parent_id)
    </ccm:query>
  </ccm:invariant>

  <ccm:invariant description="Parent of all bundles is a folder">
    <ccm:query expected="0">
select count(*) as result
  from cms_items i, cms_bundles b
 where i.item_id = b.bundle_id 
   and not exists (select 1 from cms_folders where folder_id = parent_id)
    </ccm:query>
  </ccm:invariant>

  <ccm:invariant description="Bundle names are unique within a folder">
    <ccm:query expected="0">
select count(*) as result 
  from (
    select count(*) as count, parent_id, name
      from cms_items i, cms_bundles b
     where i.item_id = b.bundle_id
       and version in ('live', 'draft')
     group by parent_id, name
  ) sub where count != 1
    </ccm:query>
  </ccm:invariant>

  <ccm:invariant description="Language instances are unique within a bundle">
    <ccm:query expected="0">
select count(*) as result 
  from (
    select count(*) as count, parent_id, language
      from cms_items i, cms_bundles b
     where i.parent_id = b.bundle_id
       and version in ('live', 'draft')
     group by parent_id, language
  ) sub where count != 1
    </ccm:query>
  </ccm:invariant>

  <ccm:invariant description="All portlets have a permission context">
    <ccm:query expected="0">
select count(*) as result 
  from portlets 
  where not exists (select 1 from object_context where object_id = portlet_id)
    </ccm:query>
  </ccm:invariant>
</ccm:invariants>