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#
# Author:: Adam Edwards (<adamed@getchef.com>)
# Copyright:: Copyright 2014 Chef Software, Inc.
# License:: Apache License, Version 2.0
#
# 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 'win32ole' if RUBY_PLATFORM =~ /mswin|mingw32|windows/
require 'wmi-lite/wmi_instance'
module WmiLite
class Wmi
def initialize(namespace = nil)
@connection = new_connection(namespace.nil? ? 'root/cimv2' : namespace)
end
def query(wql_query)
results = start_query(wql_query)
result_set = []
results.each do | result |
result_set.push(wmi_result_to_snapshot(result))
end
result_set
end
def instances_of(wmi_class)
query("select * from #{wmi_class}")
end
def first_of(wmi_class)
query_result = start_query("select * from #{wmi_class}")
first_result = nil
query_result.each do | record |
first_result = record
break
end
first_result.nil? ? nil : wmi_result_to_snapshot(first_result)
end
private
def start_query(wql_query)
@connection.ExecQuery(wql_query)
end
def new_connection(namespace)
locator = WIN32OLE.new("WbemScripting.SWbemLocator")
locator.ConnectServer('.', namespace)
end
def wmi_result_to_snapshot(wmi_object)
snapshot = Instance.new(wmi_object)
end
end
end
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