Visitor\u30d1\u30bf\u30fc\u30f3\u306f\u30c7\u30fc\u30bf\u90e8\u3068\u51e6\u7406\u90e8\u306b\u968e\u5c64\u3092\u5206\u3051\u3066\u51e6\u7406\u3092\u5b9a\u7fa9\u3059\u308b\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u3002<\/p>\n\n\n\n
package com.example.visitor;\r\n\r\npublic interface Visitor {\r\n\tpublic void visit(ConcreteElement1 group);\r\n\tpublic void visit(ConcreteElement2 department);\r\n}<\/code><\/pre>\n\n\n\npackage com.example.visitor;\r\n\r\npublic class ConcreteVisitor implements Visitor {\r\n\tpublic void visit(ConcreteElement1 group) {\r\n\t}\r\n\t\r\n\tpublic void visit(ConcreteElement2 department) {\r\n\t}\r\n}\r\n<\/code><\/pre>\n\n\n\npackage com.example.visitor;\r\n\r\npublic interface Element {\r\n\tpublic void accept(Visitor visitor);\r\n}\r\n<\/code><\/pre>\n\n\n\npackage com.example.visitor;\r\n\r\npublic class ConcreteElement1 implements Element {\r\n\tpublic ConcreteElement1() {\r\n\t}\r\n\t\r\n\tpublic void accept(Visitor visitor) {\r\n\t\tvisitor.visit(this);\r\n\t}\r\n}<\/code><\/pre>\n\n\n\npackage com.example.visitor;\r\n\r\npublic class ConcreteElement2 implements Element{\r\n\tpublic ConcreteElement2() {\r\n\t}\r\n\t\r\n\tpublic void accept(Visitor visitor) {\r\n\t\tvisitor.visit(this);\r\n\t}\r\n}\r\n<\/code><\/pre>\n\n\n\npackage com.example.visitor;\r\n\r\npublic class Main {\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\ttry {\r\n\t\t\tElement element1 = new ConcreteElement1();\r\n\t\t\tElement element2 = new ConcreteElement2();\r\n\t\t\t\r\n\t\t\telement1.accept(new ConcreteVisitor());\r\n\t\t\telement2.accept(new ConcreteVisitor());\r\n\t\t} catch (Exception e) {\r\n\t\t\te.printStackTrace();\r\n\t\t}\r\n\t\t\r\n\t}\r\n\r\n}<\/code><\/pre>\n\n\n\nElement\u304c\u30c7\u30fc\u30bf\u90e8\u3001Visitor\u304c\u51e6\u7406\u90e8\u306b\u306a\u3063\u3066\u3044\u3066\u3001<\/p>\n\n\n\n
visit\u3092\u5b9f\u884c\u6642\u306bElement\u306e\u30af\u30e9\u30b9\u306b\u3088\u3063\u3066\u5b9f\u884c\u3059\u308b\u51e6\u7406\u3092\u5207\u308a\u66ff\u3048\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
Visitor\u30d1\u30bf\u30fc\u30f3\u306f\u30c7\u30fc\u30bf\u90e8\u3068\u51e6\u7406\u90e8\u306b\u968e\u5c64\u3092\u5206\u3051\u3066\u51e6\u7406\u3092\u5b9a\u7fa9\u3059\u308b\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u3002 Element\u304c\u30c7\u30fc\u30bf\u90e8\u3001Visitor\u304c\u51e6\u7406\u90e8\u306b\u306a\u3063\u3066\u3044\u3066\u3001 visit\u3092\u5b9f\u884c\u6642\u306bElement\u306e\u30af\u30e9\u30b9\u306b\u3088\u3063\u3066\u5b9f\u884c\u3059\u308b\u51e6\u7406\u3092\u5207\u308a\u66ff\u3048 … \u7d9a\u304d\u3092\u8aad\u3080 \u3010\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3011Visitor\u30d1\u30bf\u30fc\u30f3<\/span>