Module: Exception2MessageMapper

Defined in:

lib/e2mmap.rb

Overview

	$Release Version: 2.0$
	$Revision: 1.10 $
	by Keiju ISHITSUKA

Usage:

class Foo
  extend Exception2MessageMapper
  def_e2message ExistingExceptionClass, "message..."
  def_exception :NewExceptionClass, "message..."[, superclass]
  ...
end

module Error
  extend Exception2MessageMapper
  def_e2meggage ExistingExceptionClass, "message..."
  def_exception :NewExceptionClass, "message..."[, superclass]
  ...
end
class Foo
  include Error
  ...
end

foo = Foo.new
foo.Fail ....

module Error
  extend Exception2MessageMapper
  def_e2message ExistingExceptionClass, "message..."
  def_exception :NewExceptionClass, "message..."[, superclass]
  ...
end
class Foo
  extend Exception2MessageMapper
  include Error
  ...
end

Foo.Fail NewExceptionClass, arg...
Foo.Fail ExistingExceptionClass, arg...

Constant Summary

E2MM =

Exception2MessageMapper

Class Method Summary (collapse)

• + (Object) def_e2message(k, c, m)

  E2MM.def_e2message(k, e, m).

• + (Object) def_exception(k, n, m, s = StandardError)

  E2MM.def_exception(k, n, m, s).

• + (Object) e2mm_message(klass, exp) (also: message)
• + (Object) extend_object(cl)
• + (Object) Raise(klass = E2MM, err = nil, *rest) (also: Fail)

  Fail(klass, err, *rest) klass: class to define exception under.

Instance Method Summary (collapse)

• - (Object) bind(cl)
• - (Object) def_e2message(c, m)

  def_e2message(c, m).

• - (Object) def_exception(n, m, s = StandardError)

  def_exception(n, m, s).

• - (Object) Fail

  Fail(err, *rest) err: exception rest: message arguments.

• - (Object) fail

  Fail(err, *rest) err: exception rest: message arguments.

• - (Object) Raise(err = nil, *rest)

  Fail(err, *rest) err: exception rest: message arguments.

k:  class to define exception under.
e:  exception
m:  message_form

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# File 'lib/e2mmap.rb', line 114

def E2MM.def_e2message(k, c, m)
  E2MM.instance_eval{@MessageMap[[k, c]] = m}
  c
end

k:  class to define exception under.
n:  exception_name
m:  message_form
s:	superclass(default: StandardError)

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# File 'lib/e2mmap.rb', line 126

def E2MM.def_exception(k, n, m, s = StandardError)
  n = n.id2name if n.kind_of?(Fixnum)
  e = Class.new(s)
  E2MM.instance_eval{@MessageMap[[k, e]] = m}
  k.const_set(n, e)
end

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# File 'lib/e2mmap.rb', line 153

def E2MM.e2mm_message(klass, exp)
  for c in klass.ancestors
    if mes = @MessageMap[[c,exp]]
	#p mes
	m = klass.instance_eval('"' + mes + '"')
	return m
    end
  end
  nil
end

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# File 'lib/e2mmap.rb', line 55

def E2MM.extend_object(cl)
  super
  cl.bind(self) unless cl < E2MM
end

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# File 'lib/e2mmap.rb', line 138

def E2MM.Raise(klass = E2MM, err = nil, *rest)
  if form = e2mm_message(klass, err)
    b = $@.nil? ? caller(1) : $@
    #p $@
    #p __FILE__
    b.shift if b[0] =~ /^#{Regexp.quote(__FILE__)}:/
    raise err, sprintf(form, *rest), b
  else
    E2MM.Fail E2MM, ErrNotRegisteredException, err.inspect
  end
end

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# File 'lib/e2mmap.rb', line 60

def bind(cl)
  self.module_eval %[
    def Raise(err = nil, *rest)
	Exception2MessageMapper.Raise(self.class, err, *rest)
    end
    alias Fail Raise

    def self.included(mod)
	mod.extend Exception2MessageMapper
    end
  ]
end

c:  exception
m:  message_form

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# File 'lib/e2mmap.rb', line 88

def def_e2message(c, m)
  E2MM.def_e2message(self, c, m)
end

n:  exception_name
m:  message_form
s:	superclass(default: StandardError)

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# File 'lib/e2mmap.rb', line 98

def def_exception(n, m, s = StandardError)
  E2MM.def_exception(self, n, m, s)
end

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# File 'lib/e2mmap.rb', line 80

def Raise(err = nil, *rest)
  E2MM.Raise(self, err, *rest)
end

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# File 'lib/e2mmap.rb', line 81

def Raise(err = nil, *rest)
  E2MM.Raise(self, err, *rest)
end

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# File 'lib/e2mmap.rb', line 77

def Raise(err = nil, *rest)
  E2MM.Raise(self, err, *rest)
end