Class: TTK::Dumpers::Dumper

Inherits:
Object show all
Includes:
Abstract
Defined in:
lib/ttk/dumpers/Dumper.rb

Overview

The dumper is a logger observer. It’s react to some messages, and can be compared to shell commands:

At any time `path' is "equivalent to" the shell command `pwd'.

- new_node:
  - You receive a message like that: [ :new_node, path ].
  - new_node is equivalent to `mkdir path && cd path' in shell.

- new_leaf:
  - message: [ :new_leaf, path, node ]
      Where `path' is the current path.
  - equivalent: `touch node'

- up:
  - message: [ :up, path ]
      Where `path' is the current path.
  - equivalent: `cd ..`
  - This notification change the current path to the parent.

- close:
  - message: [ :close ]
  - This notification close the dumper.

Direct Known Subclasses

Basic, Notif, Xml, Yaml

Instance Method Summary collapse

Constructor Details

#initialize(output = STDOUT) ⇒ Dumper

Returns a new instance of Dumper.



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# File 'lib/ttk/dumpers/Dumper.rb', line 41

def initialize ( output=STDOUT )
  @io = output
	@flushable = @io.respond_to?(:flush)
end

Instance Method Details

#flush ⇒ Object 



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# File 'lib/ttk/dumpers/Dumper.rb', line 62

def flush
  @io.flush if @flushable and (not @io.closed?)
end

#update(msg, *args) ⇒ Object 



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# File 'lib/ttk/dumpers/Dumper.rb', line 74

def update ( msg, *args )
	case msg
    when :up then up(*args)
    when :new_node then new_node(*args)
    when :new_leaf then new_leaf(*args)
    when :close then close(*args)
  end
end