google-api-ruby-client/lib/google/api_client/discovery/schema.rb

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# Copyright 2010 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
require 'time'
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require 'multi_json'
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require 'compat/multi_json'
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require 'base64'
require 'autoparse'
require 'addressable/uri'
require 'addressable/template'
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require 'active_support/inflector'
require 'google/api_client/errors'
module Google
class APIClient
##
# @api private
module Schema
def self.parse(api, schema_data)
# This method is super-long, but hard to break up due to the
# unavoidable dependence on closures and execution context.
schema_name = schema_data['id']
# Due to an oversight, schema IDs may not be URI references.
# TODO(bobaman): Remove this code once this has been resolved.
schema_uri = (
api.document_base +
(schema_name[0..0] != '#' ? '#' + schema_name : schema_name)
)
# puts schema_uri
# Due to an oversight, schema IDs may not be URI references.
# TODO(bobaman): Remove this whole lambda once this has been resolved.
reformat_references = lambda do |data|
# This code is not particularly efficient due to recursive traversal
# and excess object creation, but this hopefully shouldn't be an
# issue since it should only be called only once per schema per
# process.
if data.kind_of?(Hash) &&
data['$ref'] && !data['$ref'].kind_of?(Hash)
if data['$ref'].respond_to?(:to_str)
reference = data['$ref'].to_str
else
raise TypeError, "Expected String, got #{data['$ref'].class}"
end
reference = '#' + reference if reference[0..0] != '#'
data.merge({
'$ref' => reference
})
elsif data.kind_of?(Hash)
data.inject({}) do |accu, (key, value)|
if value.kind_of?(Hash)
accu[key] = reformat_references.call(value)
else
accu[key] = value
end
accu
end
else
data
end
end
schema_data = reformat_references.call(schema_data)
# puts schema_data.inspect
if schema_name
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api_name_string = ActiveSupport::Inflector.camelize(api.name)
api_version_string = ActiveSupport::Inflector.camelize(api.version).gsub('.', '_')
# This is for compatibility with Ruby 1.8.7.
# TODO(bobaman) Remove this when we eventually stop supporting 1.8.7.
args = []
args << false if Class.method(:const_defined?).arity != 1
if Google::APIClient::Schema.const_defined?(api_name_string, *args)
api_name = Google::APIClient::Schema.const_get(
api_name_string, *args
)
else
api_name = Google::APIClient::Schema.const_set(
api_name_string, Module.new
)
end
if api_name.const_defined?(api_version_string, *args)
api_version = api_name.const_get(api_version_string, *args)
else
api_version = api_name.const_set(api_version_string, Module.new)
end
if api_version.const_defined?(schema_name, *args)
schema_class = api_version.const_get(schema_name, *args)
end
end
# It's possible the schema has already been defined. If so, don't
# redefine it. This means that reloading a schema which has already
# been loaded into memory is not possible.
unless schema_class
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schema_class = AutoParse.generate(schema_data, :uri => schema_uri)
if schema_name
api_version.const_set(schema_name, schema_class)
end
end
return schema_class
end
end
end
end