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Diffstat (limited to 'qpid/ruby/lib/qpid/fields.rb')
-rw-r--r-- | qpid/ruby/lib/qpid/fields.rb | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/qpid/ruby/lib/qpid/fields.rb b/qpid/ruby/lib/qpid/fields.rb new file mode 100644 index 0000000000..cc87d07529 --- /dev/null +++ b/qpid/ruby/lib/qpid/fields.rb @@ -0,0 +1,49 @@ +# +# 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. +# + +class Class + def fields(*fields) + module_eval { + def initialize(*args, &block) + args = init_fields(*args) + + if respond_to? :init + init(*args) {|*a| yield(*a)} + elsif args.any? + raise ArgumentError, "extra arguments: #{args.inspect}" + end + end + } + + vars = fields.map {|f| :"@#{f.to_s().chomp("?")}"} + + define_method(:init_fields) {|*args| + vars.each {|v| + instance_variable_set(v, args.shift()) + } + args + } + + vars.each_index {|i| + define_method(fields[i]) { + instance_variable_get(vars[i]) + } + } + end +end |