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# Copyright 2012 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import os
import sys
import idl_schema
import json_schema
import web_idl_schema
class SchemaLoader(object):
'''Loads a schema from a provided filename.
|root|: path to the root directory.
'''
def __init__(self, root):
self._root = root
def LoadSchema(self, schema):
'''Load a schema definition. The schema parameter must be a file name
with the full path relative to the root.'''
_, schema_extension = os.path.splitext(schema)
schema_path = os.path.join(self._root, schema)
if schema_extension == '.json':
api_defs = json_schema.Load(schema_path)
elif schema_extension == '.idl':
api_defs = idl_schema.Load(schema_path)
elif schema_extension == '.webidl':
# The use of '.webidl' as a file extension is a temporary measure to
# distinguish schemas which should use the modern WebIDL parser and
# processor. Once we have migrated everything to that format we should
# change them all to use '.idl' and remove the old code path.
api_defs = web_idl_schema.Load(schema_path)
else:
sys.exit('Did not recognize file extension %s for schema %s' %
(schema_extension, schema))
# TODO(devlin): This returns a list. Does it need to? Is it ever > 1?
return api_defs
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