| # |
| # 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 Object |
| |
| public |
| |
| def traverse() |
| traverse! {|o| yield(o); o} |
| end |
| |
| def traverse_children!() |
| instance_variables.each {|v| |
| value = instance_variable_get(v) |
| replacement = yield(value) |
| instance_variable_set(v, replacement) unless replacement.equal? value |
| } |
| end |
| |
| def traverse!(replacements = {}) |
| return replacements[__id__] if replacements.has_key? __id__ |
| replacement = yield(self) |
| replacements[__id__] = replacement |
| traverse_children! {|o| o.traverse!(replacements) {|c| yield(c)}} |
| return replacement |
| end |
| |
| end |
| |
| class Array |
| def traverse_children!() |
| map! {|o| yield(o)} |
| end |
| end |
| |
| class Hash |
| def traverse_children!() |
| mods = {} |
| each_pair {|k, v| |
| key = yield(k) |
| value = yield(v) |
| mods[key] = value unless key.equal? k and value.equal? v |
| delete(k) unless key.equal? k |
| } |
| |
| merge!(mods) |
| end |
| end |