1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
require 'yaml'
require 'puppet/network'
require 'puppet/network/format'
module Puppet::Network::FormatHandler
class FormatError < Puppet::Error; end
class FormatProtector
attr_reader :format
def protect(method, args)
Puppet::Network::FormatHandler.format(format).send(method, *args)
rescue => details
direction = method.to_s.include?("intern") ? "from" : "to"
error = FormatError.new("Could not #{method} #{direction} #{format}: #{details}")
error.set_backtrace(details.backtrace)
raise error
end
def initialize(format)
@format = format
end
[:intern, :intern_multiple, :render, :render_multiple, :mime].each do |method|
define_method(method) do |*args|
protect(method, args)
end
end
end
@formats = {}
def self.create(*args, &block)
instance = Puppet::Network::Format.new(*args)
instance.instance_eval(&block) if block_given?
@formats[instance.name] = instance
instance
end
def self.create_serialized_formats(name,options = {},&block)
["application/x-#{name}", "application/#{name}", "text/x-#{name}", "text/#{name}"].each { |mime_type|
create name, {:mime => mime_type}.update(options), &block
}
end
def self.extended(klass)
klass.extend(ClassMethods)
# LAK:NOTE This won't work in 1.9 ('send' won't be able to send
# private methods, but I don't know how else to do it.
klass.send(:include, InstanceMethods)
end
def self.format(name)
@formats[name.to_s.downcase.intern]
end
def self.format_by_extension(ext)
@formats.each do |name, format|
return format if format.extension == ext
end
nil
end
# Provide a list of all formats.
def self.formats
@formats.keys
end
# Return a format capable of handling the provided mime type.
def self.mime(mimetype)
mimetype = mimetype.to_s.downcase
@formats.values.find { |format| format.mime == mimetype }
end
# Use a delegator to make sure any exceptions generated by our formats are
# handled intelligently.
def self.protected_format(name)
name = format_to_canonical_name(name)
@format_protectors ||= {}
@format_protectors[name] ||= FormatProtector.new(name)
@format_protectors[name]
end
# Return a format name given:
# * a format name
# * a mime-type
# * a format instance
def self.format_to_canonical_name(format)
case format
when Puppet::Network::Format
out = format
when %r{\w+/\w+}
out = mime(format)
else
out = format(format)
end
raise ArgumentError, "No format match the given format name or mime-type (#{format})" if out.nil?
out.name
end
module ClassMethods
def format_handler
Puppet::Network::FormatHandler
end
def convert_from(format, data)
format_handler.protected_format(format).intern(self, data)
end
def convert_from_multiple(format, data)
format_handler.protected_format(format).intern_multiple(self, data)
end
def render_multiple(format, instances)
format_handler.protected_format(format).render_multiple(instances)
end
def default_format
supported_formats[0]
end
def support_format?(name)
Puppet::Network::FormatHandler.format(name).supported?(self)
end
def supported_formats
result = format_handler.formats.collect { |f| format_handler.format(f) }.find_all { |f| f.supported?(self) }.collect { |f| f.name }.sort do |a, b|
# It's an inverse sort -- higher weight formats go first.
format_handler.format(b).weight <=> format_handler.format(a).weight
end
result = put_preferred_format_first(result)
Puppet.debug "#{friendly_name} supports formats: #{result.map{ |f| f.to_s }.sort.join(' ')}; using #{result.first}"
result
end
private
def friendly_name
if self.respond_to? :indirection
indirection.name
else
self
end
end
def put_preferred_format_first(list)
preferred_format = Puppet.settings[:preferred_serialization_format].to_sym
if list.include?(preferred_format)
list.delete(preferred_format)
list.unshift(preferred_format)
else
Puppet.debug "Value of 'preferred_serialization_format' (#{preferred_format}) is invalid for #{friendly_name}, using default (#{list.first})"
end
list
end
end
module InstanceMethods
def render(format = nil)
format ||= self.class.default_format
Puppet::Network::FormatHandler.protected_format(format).render(self)
end
def mime(format = nil)
format ||= self.class.default_format
Puppet::Network::FormatHandler.protected_format(format).mime
end
def support_format?(name)
self.class.support_format?(name)
end
end
end
require 'puppet/network/formats'
|
