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#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
#
require "set"
require "rexml/document"
require "qpid/fields"
require "qpid/traverse"
module Spec
include REXML
class Container < Array
def initialize()
@cache = {}
end
def [](key)
return @cache[key] if @cache.include?(key)
case key
when String
value = find {|x| x.name == key.intern()}
when Symbol
value = find {|x| x.name == key}
when Integer
value = find {|x| x.id == key}
else
raise Exception.new("invalid key: #{key}")
end
@cache[key] = value
return value
end
end
class Root
fields(:major, :minor, :classes, :constants, :domains)
def ruby_method(name)
classes.each do |c|
c.methods.each do |m|
if name == m.ruby_name
return m
end
end
end
end
end
class Constant
fields(:name, :id, :type, :docs)
end
class Domain
fields(:name, :type)
end
class Class
fields(:name, :id, :handler, :fields, :methods, :docs)
end
class Method
fields(:name, :id, :content?, :responses, :synchronous?, :fields,
:docs)
def init()
@response = false
end
attr :parent, true
def response?; @response end
def response=(b); @response = b end
def ruby_name
Spec.rubyize(:"#{parent.name}_#{name}")
end
end
class Field
fields(:name, :id, :type, :docs)
def ruby_name
Spec.rubyize(name)
end
def default
case type
when :bit then false
when :octet, :short, :long, :longlong then 0
when :shortstr, :longstr then ""
when :table then {}
end
end
end
class Doc
fields(:type, :text)
end
class Reference
fields(:name)
def init(&block)
@resolver = block
end
def resolve(spec, klass)
@resolver.call(spec, klass)
end
end
class Loader
def initialize()
@stack = []
end
def load(obj)
case obj
when String
elem = @stack[-1]
result = Container.new()
elem.elements.each(obj) {|e|
@index = result.size
result << load(e)
}
@index = nil
return result
else
elem = obj
@stack << elem
begin
result = send(:"load_#{elem.name}")
ensure
@stack.pop()
end
return result
end
end
def element
@stack[-1]
end
def text
element.text
end
def attr(name, type = :string, default = nil)
value = element.attributes[name]
value = value.strip() unless value.nil?
value = nil unless value.nil? or value.any?
if value.nil? and not default.nil? then
default
else
send(:"parse_#{type}", value)
end
end
def parse_int(value)
value.to_i
end
TRUE = ["yes", "true", "1"].to_set
FALSE = ["no", "false", "0", nil].to_set
def parse_bool(value)
if TRUE.include?(value)
true
elsif FALSE.include?(value)
false
else
raise Exception.new("parse error, expecting boolean: #{value}")
end
end
def parse_string(value)
value.to_s
end
def parse_symbol(value)
value.intern() unless value.nil?
end
def load_amqp()
Root.new(attr("major", :int), attr("minor", :int), load("class"),
load("constant"), load("domain"))
end
def load_class()
Class.new(attr("name", :symbol), attr("index", :int), attr("handler", :symbol),
load("field"), load("method"), load("doc"))
end
def load_method()
Method.new(attr("name", :symbol), attr("index", :int),
attr("content", :bool), load("response"),
attr("synchronous", :bool), load("field"), load("docs"))
end
def load_response()
name = attr("name", :symbol)
Reference.new {|spec, klass|
response = klass.methods[name]
if response.nil?
raise Exception.new("no such method: #{name}")
end
response
}
end
def load_field()
type = attr("type", :symbol)
if type.nil?
domain = attr("domain", :symbol)
type = Reference.new {|spec, klass|
spec.domains[domain].type
}
end
Field.new(attr("name", :symbol), @index, type, load("docs"))
end
def load_constant()
Constant.new(attr("name", :symbol), attr("value", :int), attr("class", :symbol),
load("doc"))
end
def load_domain()
Domain.new(attr("name", :symbol), attr("type", :symbol))
end
def load_doc()
Doc.new(attr("type", :symbol), text)
end
end
def Spec.load(spec)
case spec
when String
spec = File.new(spec)
end
doc = Document.new(spec)
spec = Loader.new().load(doc.root)
spec.classes.each do |klass|
klass.traverse! do |o|
case o
when Reference
o.resolve(spec, klass)
else
o
end
end
klass.methods.each do |m|
m.parent = klass
m.responses.each do |r|
r.response = true
end
end
end
spec
end
private
def Spec.rubyize(name)
name.to_s.gsub(/[\s-]/, '_').intern()
end
end
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