File Manager

X7ROOT File Manager

Current Path: /usr/share/ruby

📁 ..
📄 English.rb(6.44 KB)
📄 abbrev.rb(3.31 KB)
📄 base64.rb(2.63 KB)
📄 benchmark.rb(17.94 KB)
📁 bigdecimal
📁 cgi
📄 cgi.rb(9.39 KB)
📄 cmath.rb(7.22 KB)
📄 complex.rb(380 B)
📄 csv.rb(81.32 KB)
📁 date
📄 date.rb(946 B)
📄 debug.rb(28.9 KB)
📄 delegate.rb(9.78 KB)
📁 digest
📄 digest.rb(2.24 KB)
📁 dl
📄 dl.rb(280 B)
📁 drb
📄 drb.rb(19 B)
📄 e2mmap.rb(3.8 KB)
📄 erb.rb(26.08 KB)
📄 expect.rb(2.14 KB)
📁 fiddle
📄 fiddle.rb(1.25 KB)
📄 fileutils.rb(46.35 KB)
📄 find.rb(2.08 KB)
📄 forwardable.rb(7.56 KB)
📄 getoptlong.rb(15.38 KB)
📄 gserver.rb(8.86 KB)
📁 io
📄 ipaddr.rb(26.17 KB)
📁 irb
📄 irb.rb(20.03 KB)
📁 json
📄 json.rb(1.74 KB)
📄 kconv.rb(5.74 KB)
📄 logger.rb(20.96 KB)
📄 mathn.rb(6.52 KB)
📁 matrix
📄 matrix.rb(45.02 KB)
📄 mkmf.rb(78.13 KB)
📄 monitor.rb(6.93 KB)
📄 mutex_m.rb(2 KB)
📁 net
📄 observer.rb(5.71 KB)
📄 open-uri.rb(23.66 KB)
📄 open3.rb(21.17 KB)
📁 openssl
📄 openssl.rb(528 B)
📁 optparse
📄 optparse.rb(51.27 KB)
📄 ostruct.rb(7.64 KB)
📄 pathname.rb(15.3 KB)
📄 pp.rb(13.14 KB)
📄 prettyprint.rb(9.63 KB)
📄 prime.rb(13.98 KB)
📄 profile.rb(205 B)
📄 profiler.rb(4.29 KB)
📄 pstore.rb(14.85 KB)
📁 psych
📄 psych.rb(11.45 KB)
📁 racc
📄 rational.rb(308 B)
📁 rbconfig
📄 resolv-replace.rb(1.73 KB)
📄 resolv.rb(61.46 KB)
📁 rexml
📁 rinda
📁 ripper
📄 ripper.rb(2.53 KB)
📁 rss
📄 rss.rb(2.84 KB)
📄 scanf.rb(23.52 KB)
📄 securerandom.rb(8.56 KB)
📄 set.rb(17.32 KB)
📁 shell
📄 shell.rb(10.3 KB)
📄 shellwords.rb(5.94 KB)
📄 singleton.rb(4.02 KB)
📄 socket.rb(25.76 KB)
📄 sync.rb(7.26 KB)
📁 syslog
📄 tempfile.rb(10.15 KB)
📁 test
📄 thread.rb(6.94 KB)
📄 thwait.rb(3.38 KB)
📄 time.rb(21.09 KB)
📄 timeout.rb(3.16 KB)
📄 tmpdir.rb(4.29 KB)
📄 tracer.rb(6.54 KB)
📄 tsort.rb(6.79 KB)
📄 un.rb(8.34 KB)
📁 uri
📄 uri.rb(3.07 KB)
📁 vendor_ruby
📄 weakref.rb(3.23 KB)
📁 webrick
📄 webrick.rb(6.7 KB)
📁 xmlrpc
📄 xmlrpc.rb(8.49 KB)
📁 yaml
📄 yaml.rb(2.3 KB)

Editing: delegate.rb

# = delegate -- Support for the Delegation Pattern
#
# Documentation by James Edward Gray II and Gavin Sinclair

##
# This library provides three different ways to delegate method calls to an
# object.  The easiest to use is SimpleDelegator.  Pass an object to the
# constructor and all methods supported by the object will be delegated.  This
# object can be changed later.
#
# Going a step further, the top level DelegateClass method allows you to easily
# setup delegation through class inheritance.  This is considerably more
# flexible and thus probably the most common use for this library.
#
# Finally, if you need full control over the delegation scheme, you can inherit
# from the abstract class Delegator and customize as needed.  (If you find
# yourself needing this control, have a look at Forwardable which is also in
# the standard library.  It may suit your needs better.)
#
# SimpleDelegator's implementation serves as a nice example if the use of
# Delegator:
#
#   class SimpleDelegator < Delegator
#     def initialize(obj)
#       super                  # pass obj to Delegator constructor, required
#       @delegate_sd_obj = obj # store obj for future use
#     end
#
#     def __getobj__
#       @delegate_sd_obj # return object we are delegating to, required
#     end
#
#     def __setobj__(obj)
#       @delegate_sd_obj = obj # change delegation object,
#                              # a feature we're providing
#     end
#   end
#
# == Notes
#
# Be advised, RDoc will not detect delegated methods.
#
class Delegator < BasicObject
  kernel = ::Kernel.dup
  kernel.class_eval do
    [:to_s,:inspect,:=~,:!~,:===,:<=>,:eql?,:hash].each do |m|
      undef_method m
    end
  end
  include kernel

# :stopdoc:
  def self.const_missing(n)
    ::Object.const_get(n)
  end
  # :startdoc:

#
  # Pass in the _obj_ to delegate method calls to.  All methods supported by
  # _obj_ will be delegated to.
  #
  def initialize(obj)
    __setobj__(obj)
  end

#
  # Handles the magic of delegation through \_\_getobj\_\_.
  #
  def method_missing(m, *args, &block)
    target = self.__getobj__
    begin
      target.respond_to?(m) ? target.__send__(m, *args, &block) : super(m, *args, &block)
    ensure
      $@.delete_if {|t| %r"\A#{Regexp.quote(__FILE__)}:#{__LINE__-2}:"o =~ t} if $@
    end
  end

#
  # Checks for a method provided by this the delegate object by forwarding the
  # call through \_\_getobj\_\_.
  #
  def respond_to_missing?(m, include_private)
    r = self.__getobj__.respond_to?(m, include_private)
    if r && include_private && !self.__getobj__.respond_to?(m, false)
      warn "#{caller(3)[0]}: delegator does not forward private method \##{m}"
      return false
    end
    r
  end

#
  # Returns the methods available to this delegate object as the union
  # of this object's and \_\_getobj\_\_ methods.
  #
  def methods(all=true)
    __getobj__.methods(all) | super
  end

#
  # Returns the methods available to this delegate object as the union
  # of this object's and \_\_getobj\_\_ public methods.
  #
  def public_methods(all=true)
    __getobj__.public_methods(all) | super
  end

#
  # Returns the methods available to this delegate object as the union
  # of this object's and \_\_getobj\_\_ protected methods.
  #
  def protected_methods(all=true)
    __getobj__.protected_methods(all) | super
  end

# Note: no need to specialize private_methods, since they are not forwarded

#
  # Returns true if two objects are considered of equal value.
  #
  def ==(obj)
    return true if obj.equal?(self)
    self.__getobj__ == obj
  end

#
  # Returns true if two objects are not considered of equal value.
  #
  def !=(obj)
    return false if obj.equal?(self)
    __getobj__ != obj
  end

#
  # Delegates ! to the \_\_getobj\_\_
  #
  def !
    !__getobj__
  end

#
  # This method must be overridden by subclasses and should return the object
  # method calls are being delegated to.
  #
  def __getobj__
    raise NotImplementedError, "need to define `__getobj__'"
  end

#
  # This method must be overridden by subclasses and change the object delegate
  # to _obj_.
  #
  def __setobj__(obj)
    raise NotImplementedError, "need to define `__setobj__'"
  end

#
  # Serialization support for the object returned by \_\_getobj\_\_.
  #
  def marshal_dump
    ivars = instance_variables.reject {|var| /\A@delegate_/ =~ var}
    [
      :__v2__,
      ivars, ivars.map{|var| instance_variable_get(var)},
      __getobj__
    ]
  end

#
  # Reinitializes delegation from a serialized object.
  #
  def marshal_load(data)
    version, vars, values, obj = data
    if version == :__v2__
      vars.each_with_index{|var, i| instance_variable_set(var, values[i])}
      __setobj__(obj)
    else
      __setobj__(data)
    end
  end

def initialize_clone(obj) # :nodoc:
    self.__setobj__(obj.__getobj__.clone)
  end
  def initialize_dup(obj) # :nodoc:
    self.__setobj__(obj.__getobj__.dup)
  end
  private :initialize_clone, :initialize_dup

##
  # :method: trust
  # Trust both the object returned by \_\_getobj\_\_ and self.
  #

##
  # :method: untrust
  # Untrust both the object returned by \_\_getobj\_\_ and self.
  #

##
  # :method: taint
  # Taint both the object returned by \_\_getobj\_\_ and self.
  #

##
  # :method: untaint
  # Untaint both the object returned by \_\_getobj\_\_ and self.
  #

##
  # :method: freeze
  # Freeze both the object returned by \_\_getobj\_\_ and self.
  #

[:trust, :untrust, :taint, :untaint, :freeze].each do |method|
    define_method method do
      __getobj__.send(method)
      super()
    end
  end

@delegator_api = self.public_instance_methods
  def self.public_api   # :nodoc:
    @delegator_api
  end
end

##
# A concrete implementation of Delegator, this class provides the means to
# delegate all supported method calls to the object passed into the constructor
# and even to change the object being delegated to at a later time with
# #__setobj__.
#
# Here's a simple example that takes advantage of the fact that
# SimpleDelegator's delegation object can be changed at any time.
#
#   class Stats
#     def initialize
#       @source = SimpleDelegator.new([])
#     end
#
#     def stats(records)
#       @source.__setobj__(records)
#
#       "Elements:  #{@source.size}\n" +
#       " Non-Nil:  #{@source.compact.size}\n" +
#       "  Unique:  #{@source.uniq.size}\n"
#     end
#   end
#
#   s = Stats.new
#   puts s.stats(%w{James Edward Gray II})
#   puts
#   puts s.stats([1, 2, 3, nil, 4, 5, 1, 2])
#
# Prints:
#
#   Elements:  4
#    Non-Nil:  4
#     Unique:  4
#
#   Elements:  8
#    Non-Nil:  7
#     Unique:  6
#
class SimpleDelegator<Delegator
  # Returns the current object method calls are being delegated to.
  def __getobj__
    @delegate_sd_obj
  end

#
  # Changes the delegate object to _obj_.
  #
  # It's important to note that this does *not* cause SimpleDelegator's methods
  # to change.  Because of this, you probably only want to change delegation
  # to objects of the same type as the original delegate.
  #
  # Here's an example of changing the delegation object.
  #
  #   names = SimpleDelegator.new(%w{James Edward Gray II})
  #   puts names[1]    # => Edward
  #   names.__setobj__(%w{Gavin Sinclair})
  #   puts names[1]    # => Sinclair
  #
  def __setobj__(obj)
    raise ArgumentError, "cannot delegate to self" if self.equal?(obj)
    @delegate_sd_obj = obj
  end
end

def Delegator.delegating_block(mid) # :nodoc:
  lambda do |*args, &block|
    target = self.__getobj__
    begin
      target.__send__(mid, *args, &block)
    ensure
      $@.delete_if {|t| /\A#{Regexp.quote(__FILE__)}:#{__LINE__-2}:/o =~ t} if $@
    end
  end
end

#
# The primary interface to this library.  Use to setup delegation when defining
# your class.
#
#   class MyClass < DelegateClass(ClassToDelegateTo) # Step 1
#     def initialize
#       super(obj_of_ClassToDelegateTo)              # Step 2
#     end
#   end
#
# Here's a sample of use from Tempfile which is really a File object with a
# few special rules about storage location and when the File should be
# deleted.  That makes for an almost textbook perfect example of how to use
# delegation.
#
#   class Tempfile < DelegateClass(File)
#     # constant and class member data initialization...
#
#     def initialize(basename, tmpdir=Dir::tmpdir)
#       # build up file path/name in var tmpname...
#
#       @tmpfile = File.open(tmpname, File::RDWR|File::CREAT|File::EXCL, 0600)
#
#       # ...
#
#       super(@tmpfile)
#
#       # below this point, all methods of File are supported...
#     end
#
#     # ...
#   end
#
def DelegateClass(superclass)
  klass = Class.new(Delegator)
  methods = superclass.instance_methods
  methods -= ::Delegator.public_api
  methods -= [:to_s,:inspect,:=~,:!~,:===]
  klass.module_eval do
    def __getobj__  # :nodoc:
      @delegate_dc_obj
    end
    def __setobj__(obj)  # :nodoc:
      raise ArgumentError, "cannot delegate to self" if self.equal?(obj)
      @delegate_dc_obj = obj
    end
    methods.each do |method|
      define_method(method, Delegator.delegating_block(method))
    end
  end
  klass.define_singleton_method :public_instance_methods do |all=true|
    super(all) - superclass.protected_instance_methods
  end
  klass.define_singleton_method :protected_instance_methods do |all=true|
    super(all) | superclass.protected_instance_methods
  end
  return klass
end

# :enddoc:

if __FILE__ == $0
  class ExtArray<DelegateClass(Array)
    def initialize()
      super([])
    end
  end

ary = ExtArray.new
  p ary.class
  ary.push 25
  p ary
  ary.push 42
  ary.each {|x| p x}

foo = Object.new
  def foo.test
    25
  end
  def foo.iter
    yield self
  end
  def foo.error
    raise 'this is OK'
  end
  foo2 = SimpleDelegator.new(foo)
  p foo2
  foo2.instance_eval{print "foo\n"}
  p foo.test == foo2.test       # => true
  p foo2.iter{[55,true]}        # => true
  foo2.error                    # raise error!
end

X7ROOT File Manager

Editing: delegate.rb

Upload File

Create Folder