70 lines
1.8 KiB
Ruby
70 lines
1.8 KiB
Ruby
# --
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# Copyright (C) 2008-2009 10gen Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# ++
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module Mongo
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# Simple class for comparing server versions.
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class ServerVersion
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include Comparable
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def initialize(version)
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@version = version
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end
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# Implements comparable.
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def <=>(new)
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local, new = self.to_a, to_array(new)
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for n in 0...local.size do
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break if elements_include_mods?(local[n], new[n])
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if local[n] < new[n].to_i
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result = -1
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break;
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elsif local[n] > new[n].to_i
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result = 1
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break;
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end
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end
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result || 0
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end
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# Return an array representation of this server version.
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def to_a
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to_array(@version)
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end
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# Return a string representation of this server version.
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def to_s
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@version
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end
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private
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# Returns true if any elements include mod symbols (-, +)
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def elements_include_mods?(*elements)
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elements.any? { |n| n =~ /[\-\+]/ }
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end
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# Converts argument to an array of integers,
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# appending any mods as the final element.
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def to_array(version)
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array = version.split(".").map {|n| (n =~ /^\d+$/) ? n.to_i : n }
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if array.last =~ /(\d+)([\-\+])/
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array[array.length-1] = $1.to_i
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array << $2
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end
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array
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end
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end
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end
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