class DBus::MatchRule

D-Bus match rule class

FIXME

Constants

FILTERS

The list of possible match filters. TODO argN, argNpath

Attributes

destination[RW]

The destination filter.

interface[RW]

The interface filter.

member[RW]

The member filter.

path[RW]

The path filter.

sender[RW]

The sender filter.

type[R]

The type type that is matched.

Public Class Methods

new() click to toggle source

Create a new match rule

# File lib/dbus/matchrule.rb, line 34
def initialize
  @sender = @interface = @member = @path = @destination = @type = nil
end

Public Instance Methods

from_s(str) click to toggle source

Parses a match rule string s and sets the filters on the object.

# File lib/dbus/matchrule.rb, line 58
def from_s(str)
  str.split(",").each do |eq|
    next unless eq =~ /^(.*)='([^']*)'$/
    # "
    name = Regexp.last_match(1)
    val = Regexp.last_match(2)
    raise MatchRuleException, name unless FILTERS.member?(name.to_sym)
    method(name + "=").call(val)
  end
  self
end
from_signal(intf, signal) click to toggle source

Sets the match rule to filter for the given signal and the given interface intf.

# File lib/dbus/matchrule.rb, line 72
def from_signal(intf, signal)
  signal = signal.name unless signal.is_a?(String)
  self.type = "signal"
  self.interface = intf.name
  self.member = signal
  self.path = intf.object.path
  self
end
match(msg) click to toggle source

Determines whether a message msg matches the match rule.

# File lib/dbus/matchrule.rb, line 82
def match(msg)
  if @type
    if { Message::SIGNAL => "signal", Message::METHOD_CALL => "method_call",
         Message::METHOD_RETURN => "method_return",
         Message::ERROR => "error" }[msg.message_type] != @type
      return false
    end
  end
  return false if @interface && @interface != msg.interface
  return false if @member && @member != msg.member
  return false if @path && @path != msg.path
  # FIXME: sender and destination are ignored
  true
end
to_s() click to toggle source

Returns a match rule string version of the object. E.g.: “type=‘signal’,sender=‘org.freedesktop.DBus’,” + “interface=‘org.freedesktop.DBus’,member=‘Foo’,” + “path=‘/bar/foo’,destination=‘:452345.34’,arg2=‘bar’”

# File lib/dbus/matchrule.rb, line 51
def to_s
  present_rules = FILTERS.select { |sym| method(sym).call }
  present_rules.map! { |sym| "#{sym}='#{method(sym).call}'" }
  present_rules.join(",")
end
type=(t) click to toggle source

Set the message types to filter to type t. Possible message types are: signal, method_call, method_return, and error.

# File lib/dbus/matchrule.rb, line 40
def type=(t)
  if !["signal", "method_call", "method_return", "error"].member?(t)
    raise MatchRuleException, t
  end
  @type = t
end