Class: FSEvent::ValueIdDevice

Inherits:
AbstractDevice show all
Defined in:
lib/fsevent/valueiddevice.rb

Overview

valueiddevice.rb — value identity device

Copyright © 2014 National Institute of Advanced Industrial Science and Technology (AIST)

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see <www.gnu.org/licenses/>.

Instance Attribute Summary

Attributes inherited from AbstractDevice

#framework, #name, #schedule

Instance Method Summary collapse

Methods inherited from AbstractDevice

#add_watch, #define_status, #del_watch, #inspect, #modify_status, #register_device, #set_elapsed_time, #undefine_status, #unregister_device, #unregistered

Constructor Details

#initialize(device_name, target_device_name, status_name) ⇒ ValueIdDevice

Returns a new instance of ValueIdDevice.



19
20
21
22
23
24
25
26
 
# File 'lib/fsevent/valueiddevice.rb', line 19

def initialize(device_name, target_device_name, status_name)
  super device_name
  @target_device_name = target_device_name
  @status_name = status_name
  @defined = false
  @old_value = nil
  @id = 0
end

Instance Method Details

#registered ⇒ Object 



28
29
30
 
# File 'lib/fsevent/valueiddevice.rb', line 28

def registered
  add_watch @target_device_name, @status_name, :immediate
end

#run(watched_status, changed_status) ⇒ Object 



32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
 
# File 'lib/fsevent/valueiddevice.rb', line 32

def run(watched_status, changed_status)
  if watched_status.has_key?(@target_device_name) && watched_status[@target_device_name].has_key?(@status_name)
    value, id = watched_status[@target_device_name][@status_name]
    if !@defined
      @id += 1
      define_status(@status_name, [value, @id])
      @defined = true
      @old_value = value
    else
      if @old_value != value
        @id += 1
        modify_status(@status_name, [value, @id])
        @old_value = value
      end
    end
  else
    if @defined
      @id += 1
      undefine_status(@status_name)
      @defined = false
      @old_value = nil
    end
  end
end