Created
January 26, 2012 02:23
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# -*- coding: utf-8 -*- | |
# 本パターンは構造を持ったインスタンスを組み上げていく | |
# Builderのインターフェイスを持ち具体的にインスタンスを組み上げる | |
# ConcreateBuilderがある | |
# DirectorはBuiderのインターフェイスだけを使って指示を出し、ConcreateBuilderにインスタンスを組み上げさせる | |
# 従って、色々なConcreateBuilderがあってもDirectorは影響を受けず指示できる | |
class Builder # インターフェイスを定めている | |
def makeTitle(title) end | |
def makeString(str) end | |
def makeItems(items) end | |
def close end | |
end | |
class Director # Builderのインターフェイスを使ってインスタンスを生成する | |
def initialize(builder) | |
@builder = builder | |
end | |
def construct | |
@builder.makeTitle("Greeting") | |
@builder.makeString("朝から昼にかけて") | |
@builder.makeItems( | |
[ | |
"おはようございます。", | |
"こんにちは。" | |
]) | |
@builder.makeString("夜で") | |
@builder.makeItems( | |
[ | |
"こんばんは。", | |
"おやすみなさい。", | |
"さようなら。" | |
]) | |
@builder.close | |
end | |
end | |
class TextBuilder < Builder # ConcreateBuilder | |
def initialize | |
@buffer = "" | |
end | |
def makeTitle(title) | |
@buffer += "==============================\n" | |
@buffer += ("『" + title + "』\n" ) | |
@buffer += "\n" | |
end | |
def makeString(str) | |
@buffer += ("■" + str + "\n") | |
@buffer += "\n" | |
end | |
def makeItems(items) | |
items.each {|item| @buffer += (" ・" + item + "\n") } | |
@buffer += "\n" | |
end | |
def close | |
@buffer += "==============================\n" | |
end | |
def getResult | |
@buffer | |
end | |
end | |
class HTMLBuilder < Builder # ConcreateBuilder | |
def initialize | |
@filename = "" | |
end | |
def makeTitle(title) | |
@filename = title + ".HTML" | |
@file = File.open(@filename, "w") | |
@file.puts "<html><head><title>" + title + "</title></head><body>" | |
@file.puts "<h1>" + title + "</h1>" | |
end | |
def makeString(str) | |
@file.puts "<p>" + str + "</p>" | |
end | |
def makeItems(items) | |
@file.puts "<ul>" | |
items.each {|item| @file.puts "<li>" + item + "</li>" } | |
@file.puts "</ul>" | |
end | |
def close | |
@file.puts "</body></html>" | |
@file.close | |
end | |
def getResult | |
@filename | |
end | |
end | |
class StringBuilder < Builder | |
def initialize @string = "" end | |
def makeTitle(title) @string += title + "\n" end | |
def makeString(str) @string += str + "\n" end | |
def makeItems(items) @string += items.join(',') + "\n" end | |
def close @string += "\n" end | |
def getResult @string end | |
end | |
textbuilder = TextBuilder.new # ConcreateBuilderを生成 建築物の様式を決定 | |
director = Director.new(textbuilder) # 監督者に建築物の様式を指定 | |
director.construct # 監督者が指示を出す 建築物が出来上がる | |
result = textbuilder.getResult | |
puts result | |
htmlbuilder = HTMLBuilder.new | |
director = Director.new(htmlbuilder) | |
director.construct | |
filename = htmlbuilder.getResult | |
puts filename + "が作成されました" | |
stringbuilder = StringBuilder.new | |
director = Director.new(stringbuilder) | |
director.construct | |
result = stringbuilder.getResult | |
puts result |
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