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#
# Copyright (c) 2006 The Apache Software Foundation
#
# Licensed 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
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