# Copyright 2011 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"). You
# may not use this file except in compliance with the License. A copy of
# the License is located at
#
#     http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file 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 'aws/lazy_error_classes'
require 'aws/s3/client/xml'

module AWS
  class S3

    # This module contains exception classes for each of the error
    # types that S3 can return.  You can use these classes to rescue
    # specific errors, for example:
    #
    #  begin
    #    S3.new.buckets.mybucket.
    #      objects.myobj.write("HELLO")
    #  rescue S3::Errors::NoSuchBucket => e
    #    S3.new.buckets.create("mybucket")
    #    retry
    #  end
    #
    # All errors raised as a result of error responses from the
    # service are instances of either {ClientError} or {ServerError}.
    # @private
    module Errors

      BASE_ERROR_GRAMMAR = Client::XML::Error

      include LazyErrorClasses

      # This error is special, because S3 does not (and must not
      # according to RFC 2616) return a body with the HTTP response.
      # The interface is the same as for any other client error.
      class NotModified < AWS::Errors::Base
        include AWS::Errors::ClientError

        def code; "NotModified"; end

        def initialize(req, resp)
          super(req, resp, "Not Modified")
        end

      end

      # This error is special, because S3 does not return a body with
      # the HTTP response.  The interface is the same as for any other
      # client error.
      class NoSuchKey < AWS::Errors::Base
        include AWS::Errors::ClientError

        def code; "NoSuchKey"; end

        def initialize(req, resp)
          super(req, resp, "No Such Key")
        end

      end

    end
  end
end