{"id":144,"date":"2016-11-22T00:22:16","date_gmt":"2016-11-21T15:22:16","guid":{"rendered":"http:\/\/www.hundredapps.net\/?p=144"},"modified":"2017-11-10T09:51:21","modified_gmt":"2017-11-10T00:51:21","slug":"builder%e3%83%91%e3%82%bf%e3%83%bc%e3%83%b3","status":"publish","type":"post","link":"https:\/\/www.hundredapps.net\/?p=144","title":{"rendered":"Builder\u30d1\u30bf\u30fc\u30f3"},"content":{"rendered":"<h3>Android\u3067Builder pattern\u3092\u5b9f\u88c5\u3057\u305f\u306e\u3067\u6539\u3081\u3066\u81ea\u5206\u306a\u308a\u306b\u307e\u3068\u3081\u3066\u307f\u308b\u3053\u3068\u306b\u3059\u308b\u3002<\/h3>\n<p>\u53c2\u8003\u66f8\u7c4d <br \/>\n<a  href=\"https:\/\/www.amazon.co.jp\/gp\/product\/4621066056\/ref=as_li_qf_sp_asin_tl?ie=UTF8&#038;camp=247&#038;creative=1211&#038;creativeASIN=4621066056&#038;linkCode=as2&#038;tag=hundredapps05-22\">EFFECTIVE JAVA \u7b2c2\u7248 (The Java Series)<\/a><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/ir-jp.amazon-adsystem.com\/e\/ir?t=hundredapps05-22&#038;l=as2&#038;o=9&#038;a=4621066056\" width=\"1\" height=\"1\" border=\"0\" alt=\"\" style=\"border:none !important; margin:0px !important;\" \/><\/p>\n<a  href=\"https:\/\/www.amazon.co.jp\/gp\/product\/B00I8ATHGW\/ref=as_li_qf_sp_asin_tl?ie=UTF8&#038;camp=247&#038;creative=1211&#038;creativeASIN=B00I8ATHGW&#038;linkCode=as2&#038;tag=hundredapps05-22\">\u5897\u88dc\u6539\u8a02\u7248 Java\u8a00\u8a9e\u3067\u5b66\u3076\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u5165\u9580<\/a><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/ir-jp.amazon-adsystem.com\/e\/ir?t=hundredapps05-22&#038;l=as2&#038;o=9&#038;a=B00I8ATHGW\" width=\"1\" height=\"1\" border=\"0\" alt=\"\" style=\"border:none !important; margin:0px !important;\" \/>\n<h2>help somebody understand<\/h2>\n<p>\u30fbBuilder\u3068\u306f\u3001\u5efa\u7bc9\u8005\u3092\u610f\u5473\u3057\u3066\u3044\u308b\u3002<br \/>\n\u30fb\u30d3\u30eb\u3092\u5efa\u3066\u308b\u6642\u306f\u3001\u5730\u76e4\u3092\u56fa\u3081\u3001\u9aa8\u7d44\u307f\u3092\u3064\u304f\u308a\u3001\u4e0b\u304b\u3089\u4e0a\u306b\u9806\u756a\u305a\u3064\u4f5c\u3063\u3066\u3044\u304f\u3002<br \/>\n\u30fb\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306a\u3069\u306b\u591a\u304f\u306e\u5f15\u6570\u3092\u6e21\u3055\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u5834\u5408(hint 4\u3064\u4ee5\u4e0a or \u5897\u3048\u3066\u3044\u304d\u305d\u3046\u306a\u5834\u5408)\u3001Builder\u30d1\u30bf\u30fc\u30f3\u3092\u8003\u3048\u308b\u3002<\/p>\n<h5>\u308f\u304b\u308a\u3065\u3089\u304f\u306a\u308b\u30d1\u30bf\u30fc\u30f3\u306e\u4f8b<\/h5>\n<h2>\u300cTelescoping Constractor\u300dpattern<\/h2>\n<p>*\u30c6\u30ec\u30b9\u30b3\u30fc\u30d4\u30f3\u30b0(\u4f38\u7e2e)\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30e9\u30bf<\/p>\n<pre>\npublic class Member {\n    private String mName;\n    private int mAge;\n    private String mJob;\n    private String mHobby;\n    private boolean mMarriedFlg;\n\n    public Member(String name, int age) {\n        this(name, age, null, null);\n    }\n\n    public Member(String name, int age, String job) {\n        this(name, age, job, null, false);\n    }\n\n    public Member(String name, int age, String job, String hobby) {\n        this(name, age, job, hobby, false);\n    }\n\n    public Member(String name, int age, String job, String hobby, boolean marriedFlg) {\n        this.mName = name;\n        this.mAge = age;\n        this.mJob = job;\n        this.mHobby = hobby;\n        this.mMarriedFlg = marriedFlg;\n    }\n}\n<\/pre>\n<p>\uff14\u3064\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u306a\u306e\u3067\u3001\u307e\u3060\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u5074(\u3053\u306e\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3059\u308b\u5074)\u3082\u66f8\u304f\u306e\u304c\u56f0\u96e3\u3067\u306f\u306a\u3044\u3068\u601d\u3046\u304c\u3001\u3055\u3089\u306b\u5897\u3048\u3066\u3044\u304f\u3068\u3001<br \/>\n\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3001\u8aad\u3080\u3001\u3068\u3044\u3046\u884c\u70ba\u304c\u56f0\u96e3\u306b\u306a\u308a\u3001\u6b21\u7b2c\u306b\u4fdd\u5b88\u6027\u304c\u5931\u308f\u308c\u3066\u3044\u304f\u3002<\/p>\n<p><a href=\"https:\/\/ja.wikipedia.org\/wiki\/%E3%83%86%E3%83%AC%E3%82%B9%E3%82%B3%E3%83%BC%E3%83%94%E3%83%B3%E3%82%B0\" target=\"_blank\">\u30c6\u30ec\u30b9\u30b3\u30fc\u30d4\u30f3\u30b0<\/a><\/p>\n<p>\u305d\u3057\u3066\u3001\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u591a\u3044(\u53c8\u306f\u591a\u304f\u306a\u308b)\u3053\u3068\u306b\u3088\u308b\u3001\u5148\u307b\u3069\u306e\u6b20\u70b9\u3092\u88dc\u3046\u306e\u304cJavaBean\u30d1\u30bf\u30fc\u30f3\u306b\u306a\u308b\u3002<br \/>\n\u53ef\u8aad\u6027\u304c\u826f\u304f\u306a\u308a\u307e\u3059\u3002<br \/>\n\u3057\u304b\u3057\u3001\u3053\u306e\u5834\u5408\u3001\u307e\u305f\u5225\u306e\u554f\u984c\u304c\u8d77\u3053\u308b\u3002<br \/>\n\u5fc5\u9808\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u305f\u3044\u30d1\u30e9\u30e1\u30fc\u30bf(name, age)\u3092\u3001\u30bb\u30c3\u30c8\u3057\u5fd8\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u3001\u30b7\u30b9\u30c6\u30e0\u304c\u4e0d\u6574\u5408\u306a\u72b6\u614b\u306b\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u5f97\u308b\u3002<\/p>\n<pre>\npublic class Member {\n    private String mName;\n    private int mAge;\n    private String mJob;\n    private String mHobby;\n    private boolean mMarriedFlg;\n\n    public String getName() {\n        return mName;\n    }\n\n    public void setName(String name) {\n        this.mName = name;\n    }\n\n    public int getAge() {\n        return mAge;\n    }\n\n    public void setAge(int age) {\n        this.mAge = age;\n    }\n\n    public String getJob() {\n        return mJob;\n    }\n\n    public void setJob(String job) {\n        this.mJob = job;\n    }\n\n    public String getHobby() {\n        return mHobby;\n    }\n\n    public void setHobby(String hobby) {\n        this.mHobby = hobby;\n    }\n\n    public boolean isMarriedFlg() {\n        return mMarriedFlg;\n    }\n\n    public void setMarriedFlg(boolean marriedFlg) {\n        this.mMarriedFlg = marriedFlg;\n    }\n}\n<\/pre>\n<p>\u4e0a\u8a18\uff12\u3064\u306e\u6b20\u70b9\u306f\u3001\u30b3\u30fc\u30c9\u306e\u4fdd\u5b88\u6027\u304c\u60aa\u304f\u306a\u308a\u3001\u6574\u5408\u6027\u304c\u53d6\u308c\u306a\u304f\u306a\u308b\u3002<br \/>\n\u305d\u3053\u3067\u3001\u30c6\u30ec\u30b9\u30b3\u30fc\u30d4\u30f3\u30b0(\u4f38\u7e2e)\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30e9\u30bf\u3068JavaBean\u306e\u6b20\u70b9\u3092\u88dc\u3046\u306e\u304c\u3001Builder\u30d1\u30bf\u30fc\u30f3\u306b\u306a\u308b\u3002<\/p>\n<pre>\npublic class Member {\n    \/\/ require parameter\n    private final String mName;\n    private final int mAge;\n\n    \/\/ option parameter\n    private final String mJob;\n    private final String mHobby;\n    private final boolean mMarriedFlg;\n\n\n    public static class Builder {\n        \/\/ require parameter\n        private String mName;\n        private int mAge;\n\n        \/\/ option parameter\n        private String mJob;\n        private String mHobby;\n        private boolean mMarriedFlg = false;\n\n        public Builder(String name, int age) {\n            this.mName = name;\n            this.mAge = age;\n        }\n\n        public Builder setJob(String job) {\n            this.mJob = job;\n            return this;\n        }\n\n        public Builder setHobby(String hobby) {\n            this.mHobby = hobby;\n            return this;\n        }\n\n        public Builder setMarried(boolean flg) {\n            this.mMarriedFlg = flg;\n            return this;\n        }\n\n        public Member build() {\n            return new Member(this);\n        }\n    }\n    \/\/ point! DesignPattern.Builder.BuilderPattern.TelescopingConstractor.Member class constractor must be private.\n    private Member(Builder builder) {\n        this.mName = builder.mName;\n        this.mAge = builder.mAge;\n        this.mJob = builder.mJob;\n        this.mHobby = builder.mHobby;\n        this.mMarriedFlg = builder.mMarriedFlg;\n    }\n\n    \/\/ getter \u7701\u7565\n}\n<\/pre>\n<h2>Builder pattern design help<\/h2>\n<p>\u30fbBuilder pattern class\u306einstance\u3092\u4f5c\u6210\u3057\u3001Builder\u306econstractor\u306b\u3001required parameter\u3092\u5165\u308c\u308b\u3002<br \/>\n\u30fbMember class\u306econstractor\u306f\u3001private\u306b\u3057\u3066\u3001\u96a0\u853d\u3059\u308b\u3002<\/p>\n<div style=\"float:left; margin: 10px;\">\n<iframe src=\"https:\/\/rcm-fe.amazon-adsystem.com\/e\/cm?t=hundredapps05-22&#038;o=9&#038;p=8&#038;l=as1&#038;asins=4621066056&#038;ref=qf_sp_asin_til&#038;fc1=000000&#038;IS2=1&#038;lt1=_blank&#038;m=amazon&#038;lc1=0000FF&#038;bc1=000000&#038;bg1=FFFFFF&#038;f=ifr\" style=\"width:120px;height:240px;\" scrolling=\"no\" marginwidth=\"0\" marginheight=\"0\" frameborder=\"0\"><\/iframe>\n<\/div>\n<div style=\"float:left; margin: 10px;\">\n<iframe src=\"https:\/\/rcm-fe.amazon-adsystem.com\/e\/cm?t=hundredapps05-22&#038;o=9&#038;p=8&#038;l=as1&#038;asins=B00I8ATHGW&#038;ref=qf_sp_asin_til&#038;fc1=000000&#038;IS2=1&#038;lt1=_blank&#038;m=amazon&#038;lc1=0000FF&#038;bc1=000000&#038;bg1=FFFFFF&#038;f=ifr\" style=\"width:120px;height:240px;\" scrolling=\"no\" marginwidth=\"0\" marginheight=\"0\" frameborder=\"0\"><\/iframe>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Android\u3067Builder pattern\u3092\u5b9f\u88c5\u3057\u305f\u306e\u3067\u6539\u3081\u3066\u81ea\u5206\u306a\u308a\u306b\u307e\u3068\u3081\u3066\u307f\u308b\u3053\u3068\u306b\u3059\u308b\u3002 \u53c2\u8003\u66f8\u7c4d&#8230;<\/p>\n","protected":false},"author":1,"featured_media":243,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12,11],"tags":[],"class_list":["post-144","post","type-post","status-publish","format-standard","has-post-thumbnail","category-designpattern","category-java","article cf"],"_links":{"self":[{"href":"https:\/\/www.hundredapps.net\/index.php?rest_route=\/wp\/v2\/posts\/144","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hundredapps.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hundredapps.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hundredapps.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hundredapps.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=144"}],"version-history":[{"count":40,"href":"https:\/\/www.hundredapps.net\/index.php?rest_route=\/wp\/v2\/posts\/144\/revisions"}],"predecessor-version":[{"id":290,"href":"https:\/\/www.hundredapps.net\/index.php?rest_route=\/wp\/v2\/posts\/144\/revisions\/290"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.hundredapps.net\/index.php?rest_route=\/wp\/v2\/media\/243"}],"wp:attachment":[{"href":"https:\/\/www.hundredapps.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=144"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hundredapps.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=144"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hundredapps.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=144"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}