Contents

#
# Copyright (C) 2009, 2010  Red Hat, Inc.
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.  The
# ASF licenses this file to you 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.

module Deltacloud::BackendCapability

  class Failure < StandardError
    attr_reader :capability
    def initialize(capability, msg='')
      super(msg)
      @capability = capability
    end
  end

  attr_reader :capability
  def with_capability(capability)
    @capability = capability
  end

  def check_capability(backend)
    if capability and !backend.respond_to?(capability)
      raise Failure.new(capability, "#{capability} capability not supported by backend #{backend.class.name}")
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
deltacloud-core-0.1.2	lib/deltacloud/backend_capability.rb