80 lines
1.3 KiB
Ruby
80 lines
1.3 KiB
Ruby
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class Cache
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READ = 1
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WRITE = 2
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attr_reader :source, :data
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def initialize source, type = nil, data = nil
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type ||= READ | WRITE
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@source, @data, self.type = source, data || {}, type
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end
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def flush!
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@data.each {|k,v| @obj[k] = v }
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@data = {}
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end
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def dget k
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@data[k] ||= @obj[k]
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end
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def oget k
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@data[k] || @obj[k]
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end
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def dset k, v
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@data[k] ||= v
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end
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def oset k, v
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@obj[k] = v
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end
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def type= type
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self.read, self.write = type & 1 > 0, type & 2 > 0
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type
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end
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def read_cache= type
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@type &= ~ (type ? 0 : 1)
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define_singleton_method :[], type ? :oget, :dget
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end
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def write_cache= type
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@type &= ~ (type ? 0 : 2)
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define_singleton_method :[], type ? :oset, :dset
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end
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#include Enumerable
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#def each &e
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#return Enumerator.new self, :each unless e
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#flush!
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#@obj.each &e
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#self
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#end
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end
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class AutoValueConvertHash
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include Enumerable
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def initialize obj, encode = nil, each = nil, &decode
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@object, @encoder = obj, decode.nil? ? encode || Marshal.method( :dump) : nil,
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@each = each || obj.method( :each) rescue NameError
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@decode = decode || Marshal.method( :restore)
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end
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def [] k
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decode.call @object[k]
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end
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def []= k, v
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@object[k] = encode.call v
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end
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def each *paras
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@each.call *paras do |k, v|
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yield k, decode( v)
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end
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end
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end
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