def alter_schema(self, schema, fqn):
if schema[u'type'] != u'object':
# some properties must be moved from the array object to the item
# object :
items = Schema(schema)
# clean some uneeded value in items
for k in items.keys():
if k in ['asPatternProperty', 'required']:
del items[k]
# delete migrated values
for k in schema.keys():
if k in items:
del schema[k]
schema[u'type'] = u'array'
schema[u'items'] = items
if self.min_items is not None:
schema[u'minItems'] = self.min_items
if self.max_items is not None:
schema[u'maxItems'] = self.max_items
