{"id":151,"date":"2014-02-05T03:52:28","date_gmt":"2014-02-04T18:52:28","guid":{"rendered":"http:\/\/www.dracula.mydns.jp\/blog\/?p=151"},"modified":"2014-02-05T03:52:28","modified_gmt":"2014-02-04T18:52:28","slug":"%e8%a6%8b%e3%82%8d%ef%bc%81%ef%bc%81%e3%82%b3%e3%83%bc%e3%83%89%e3%81%8c%e3%82%b4%e3%83%9f%e3%81%ae%e3%82%88%e3%81%86%e3%81%a0%ef%bc%81%ef%bc%81","status":"publish","type":"post","link":"https:\/\/www.dracula.mydns.jp\/blog\/?p=151","title":{"rendered":"\u898b\u308d\uff01\uff01\u30b3\u30fc\u30c9\u304c\u30b4\u30df\u306e\u3088\u3046\u3060\uff01\uff01"},"content":{"rendered":"

\u307e\u305a\u306f\u4ee5\u4e0b\u306ejava\u306e\u30b3\u30fc\u30c9\u3092\u307f\u3066\u3082\u3089\u304a\u3046\u3002<\/p>\n

\nclass SampleClass {\n  public int i;\n  public String s;\n}\n\npublic class Test {\n  static public void main(String[] args) {\n    Test test = new Test();\n\n\n    SampleClass a = new SampleClass();\n    a.i = 1;\n    a.s = "a";\n    \n    SampleClass b = new SampleClass();\n    b.i = 2;\n    b.s = "b";\n\n    System.out.println("== before ===");\n    System.out.println("a= " + a.i + ":" + a.s);\n    System.out.println("b= " + b.i + ":" + b.s);\n\n    SampleClass c = test.antiPattern(a,b);\n\n    System.out.println("== after ===");\n    System.out.println("a= " + a.i + ":" + a.s);\n    System.out.println("b= " + b.i + ":" + b.s);\n    System.out.println("c= " + c.i + ":" + c.s);\n  }\n\n  public SampleClass antiPattern(SampleClass a, SampleClass b) {\n    a.i = 11;\n    a.s = "A";\n\n    SampleClass b2 = new SampleClass();\n    b2.i = 12;\n    b2.s = "B";\n    b = b2;\n\n    SampleClass c = new SampleClass();\n    c = b2;\n    return c;\n  }\n}\n<\/pre>\n
main\u30e1\u30bd\u30c3\u30c9\u3067antiPattern\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3076\u524d\u5f8c\u3067\u5909\u6570\u5024\u3092\u51fa\u529b\u3057\u3066\u3044\u308b\u8a33\u3060\u304c\u4f55\u304c\u51fa\u529b\u3055\u308c\u308b\u304b\u5206\u304b\u308b\u3060\u308d\u3046\u304b\u3002<\/p>\n
\u7d50\u679c\u306f\u3053\u3046\u3067\u3042\u308b\u3002<\/p>\n
\n== before ===\na= 1:a\nb= 2:b\n== after ===\na= 11:A\nb= 2:b\nc= 12:B\n<\/pre>\n
\u5909\u6570c\u306f\u826f\u3044\u3068\u3057\u3066\u3082\u3001a\u3084b\u307e\u3067\u3082main\u30e1\u30bd\u30c3\u30c9\u3060\u3051\u3092\u898b\u3066\u3044\u3066\u306f\u6c7a\u3057\u3066\u5206\u304b\u308a\u3088\u3046\u304c\u306a\u3044\u7d50\u679c\u304c\u51fa\u529b\u3055\u308c\u308b\u306e\u3067\u3042\u308b\u3002\u3055\u3089\u306b\u8a00\u3046\u3068antiPattern\u30e1\u30bd\u30c3\u30c9\u3092\u898b\u3066\u307f\u308b\u3068\u76f4\u611f\u7684\u306b\u306fb\u3082\u66f4\u65b0\u3055\u308c\u3066\u3088\u3055\u305d\u3046\u306a\u6c17\u304c\u3059\u308b\u306e\u3060\u304c\u5b9f\u969b\u306f\u305d\u3046\u306f\u306a\u3089\u306a\u3044\u3002\u3053\u306e\u8fba\u306fjava\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u30dd\u30a4\u30f3\u30bf\u306e\u5024\u6e21\u3057\u3067\u3042\u308b\u3068\u3044\u3046\u8a00\u8a9e\u4ed5\u69d8\u306b\u3088\u308b\u3082\u306e\u3067\u3042\u308b\u3002<\/p>\n
\u3057\u304b\u3057\u3053\u308c\u306f\u8a00\u8a9e\u4ed5\u69d8\u304c\u8a31\u3057\u3066\u3044\u308b\u304b\u3089\u3068\u8a00\u3063\u3066\u66f8\u3044\u3066\u306f\u3044\u3051\u306a\u3044\u30b3\u30fc\u30c9\u306e\u4ee3\u8868\u683c\u3068\u8a00\u3048\u308b\u3060\u308d\u3046\u3002main\u30e1\u30bd\u30c3\u30c9\u3092\u8aad\u3093\u3067\u3044\u308b\u306e\u306bantiPattern\u30e1\u30bd\u30c3\u30c9\u304c\u3069\u3046\u306a\u3063\u3066\u3044\u308b\u304b\u307e\u3067\u610f\u8b58\u3057\u306a\u304f\u3066\u306f\u3044\u3051\u306a\u3044\u3002<\/p>\n
\u4e0a\u306e\u4f8b\u3067\u306fantiPattern\u30e1\u30bd\u30c3\u30c9\u304c\u5b9f\u884c\u30b9\u30c6\u30c3\u30d7\u306b\u3057\u306610\u884c\u8db3\u3089\u305a\u3067\u5b8c\u7d50\u3057\u3066\u3044\u308b\u306e\u3067\u307e\u3060\u3088\u3044\u304c\u3001antiPattern\u30e1\u30bd\u30c3\u30c9\u3082\u540c\u3058\u3088\u3046\u306b\u5225\u306e\u30e1\u30bd\u30c3\u30c9A\u3092\u547c\u3073\u3060\u3057\u3066A\u306e\u4e2d\u3067\u3082\u6e21\u3057\u305f\u5909\u6570\u306e\u4e2d\u8eab\u304c\u5909\u308f\u3063\u3066\u8fd4\u3063\u3066\u304f\u308b\u3068\u306a\u3063\u305f\u3089\u3069\u3046\u3060\u308d\u3046\u304b\u3002\u3055\u3089\u306bA\u306e\u4e2d\u3067\u3082B\u3092\u547c\u3073\u51fa\u3057\u3001B\u306e\u4e2d\u3067\u3082C\u3092\u547c\u3073\u51fa\u3057\u30fb\u30fb\u30fb\u3002
\n\u7d50\u5c40\u5168\u90e8\u306e\u30b3\u30fc\u30c9\u3092\u7406\u89e3\u3057\u306a\u3044\u3068\u9ad8\u3005\u6570\u5341\u884c\u306emain\u30e1\u30bd\u30c3\u30c9\u3059\u3089\u8aad\u307f\u89e3\u304f\u3053\u3068\u304c\u3067\u304d\u306a\u3044\u3002
\n\u3053\u308c\u3067\u306f\u4fdd\u5b88\u6027\u304c\u60aa\u304f\u3066\u3069\u3046\u3057\u3088\u3046\u3082\u306a\u3044\u3002
\n\u3053\u308c\u3092\u30b4\u30df\u30b3\u30fc\u30c9\u3068\u547c\u3070\u305a\u306b\u3044\u3089\u308c\u308b\u3060\u308d\u3046\u304b\u3002\u3044\u3084\u3001\u3044\u3089\u308c\u307e\u3044\uff08\u53cd\u8a9e\uff09\u3002<\/p>\n
\u3055\u3066\u3001\u7a81\u7136\u3053\u3093\u306a\u3053\u3068\u3092\u66f8\u3044\u305f\u306e\u306f\u4ed5\u4e8b\u3067\u3053\u3093\u306a\u30b3\u30fc\u30c9\u3092\u898b\u305f\u304b\u3089\u3067\u3042\u308b\u3002
\n\u5b9f\u969b\u306f\u3082\u3063\u3068\u51e6\u7406\u304c\u3042\u308b\u304c\u3001\u30dd\u30a4\u30f3\u30c8\u3060\u3051\u629c\u7c8b\u3057\u305f\u3002<\/p>\n
\npublic class Y {\n  public void methodA() {\n    \u30fb\u30fb\u30fb\n    XListGenerator generator = new XListGenerator(a,b,c);\n    List<X> xList = new ArrayList<X>();\n    \u30fb\u30fb\u30fb\n    List<Something> somethingList = new ArrayList<Something>();\n\u3000\u3000\u30fb\u30fb\u30fb\n    generator.set(xList, somethingList);\n  }\n}\n<\/pre>\n
\u30af\u30e9\u30b9\u540d\u304c\u60aa\u3044\u3001\u5909\u6570\u540d\u304c\u60aa\u3044\u3068\u304b\u8a00\u3044\u305f\u3044\u308f\u3051\u3067\u306f\u306a\u3044\u3002
\nmethodA\u304c\u4f55\u3092\u3084\u3063\u3066\u3044\u308b\u304b\u5206\u304b\u308b\u3060\u308d\u3046\u304b\u3002
\n\u300cgenerator\u306b\uff12\u3064\u306elist\u3092\u8a2d\u5b9a\u3057\u3066\u3044\u308b\u3002\u300d\u3068\u8aad\u307f\u3068\u308b\u306e\u304c\u81ea\u7136\u3067\u306f\u306a\u3044\u3060\u308d\u3046\u304b\u3002<\/p>\n
\u3057\u304b\u3057generator.set(list,somethingList)\u306e\u4e2d\u3092\u898b\u3066\u6115\u7136\u3068\u3057\u305f\u3002\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5185\u5bb9\u306a\u306e\u3067\u3042\u3063\u305f\u3002<\/p>\n
\n   public set(List<X> xList, List<Something> somethingList) {\n       for(i=0; i<somethingList.size(); i++) {\n          String s= somethingList.get(i).getString();\n          xList.get(i).setS(s);\n       }\n   }\n<\/pre>\n
\u306a\u3093\u306a\u3093\u3067\u3057\u3087\u3046\u304b\u3053\u308c\u3002<\/p>\n
\u5b8c\u5168\u306b\u4f9d\u5b58\u95a2\u4fc2\u304c\u3042\u308b\u3093\u3060\u3057\u30e1\u30bd\u30c3\u30c9\u3092\u5206\u3051\u305f\u3063\u3066\u767e\u5bb3\u3042\u3063\u3066\u4e00\u5229\u306a\u3057\u3060\u3002set\u306e\u4e3b\u4f53\u3082generator\u306a\u306e\u304b\u306a\u3093\u306a\u306e\u304b\u3088\u304f\u5206\u304b\u3089\u306a\u3044\u3002
\n\u3053\u308c\u3067\u3044\u3044\u3058\u3083\u306a\u3044\u3002<\/p>\n
\npublic class Y {\n  public void methodA() {\n    \u30fb\u30fb\u30fb\n    List<X> xList = new ArrayList<X>();\n    \u30fb\u30fb\u30fb\n    List<Something> somethingList = new ArrayList<Something>();\n\u3000\u3000\u30fb\u30fb\u30fb\n    for(i=0; i<somethingList.size(); i++) {\n       String s= somethingList.get(i).getString();\n       xList.get(i).setS(s);\n    }\n  }\n}\n<\/pre>\n
\u3069\u3046\u3057\u3066\u3082generator\u3092\u4f7f\u3044\u305f\u3044\u306a\u3089\u3001\u306a\u308b\u3079\u304f\u539f\u578b\u3092\u6b8b\u3057\u305f\u3068\u3057\u3066\u3053\u3046\u3060\u3002<\/p>\n
\npublic class Y {\n  public void methodA() {\n    \u30fb\u30fb\u30fb\n\u3000\u3000XListGenerator generator = new XListGenerator(a,b,c);\n    \u30fb\u30fb\u30fb\n    List<Something> somethingList = new ArrayList<Something>();\n\u3000\u3000\u30fb\u30fb\u30fb\n    List<X> xList = generator.generate(somethingList);\n  }\n}\n<\/pre>\n
\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u52d5\u3051\u3070\u3088\u3044\uff01\u3068\u3044\u3046\u306e\u306f\u81ea\u5206\u4e00\u4eba\u3067\u4f5c\u3063\u3066\u3044\u308b\u5834\u5408\u306b\u9650\u308b\u306e\u3067\u3042\u308b\u3002
\n\u3053\u3093\u306a\u30b3\u30fc\u30c9\u3092\u8aad\u307e\u306a\u3051\u308c\u3070\u3044\u3051\u306a\u3044\u4ed6\u4eba\u306e\u8eab\u306b\u3082\u306a\u3063\u3066\u30b3\u30fc\u30c9\u306f\u66f8\u304f\u3079\u304d\u3067\u3042\u308b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u307e\u305a\u306f\u4ee5\u4e0b\u306ejava\u306e\u30b3\u30fc\u30c9\u3092\u307f\u3066\u3082\u3089\u304a\u3046\u3002 class SampleClass { public int i; public String s; } public class Test { static public  […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,6],"tags":[],"class_list":["post-151","post","type-post","status-publish","format-standard","hentry","category-5","category-6"],"_links":{"self":[{"href":"https:\/\/www.dracula.mydns.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/151","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dracula.mydns.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dracula.mydns.jp\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dracula.mydns.jp\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dracula.mydns.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=151"}],"version-history":[{"count":0,"href":"https:\/\/www.dracula.mydns.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/151\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.dracula.mydns.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=151"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dracula.mydns.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=151"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dracula.mydns.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=151"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}