{"id":50769,"date":"2024-08-10T15:41:03","date_gmt":"2024-08-10T06:41:03","guid":{"rendered":"https:\/\/8gfg.shop\/blog\/development\/advanced-use-of-the-decorator-pattern-for-dynamic-addition-of-functionality"},"modified":"2024-08-10T15:41:03","modified_gmt":"2024-08-10T06:41:03","slug":"advanced-use-of-the-decorator-pattern-for-dynamic-addition-of-functionality","status":"publish","type":"post","link":"https:\/\/8gfg.shop\/blog\/development\/advanced-use-of-the-decorator-pattern-for-dynamic-addition-of-functionality","title":{"rendered":"\uae30\ub2a5\uc758 \ub3d9\uc801 \ucd94\uac00\ub97c \uc704\ud55c \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc758 \uace0\uae09 \ud65c\uc6a9"},"content":{"rendered":"<ul class=\"toc_post_list\">\n<li>\n<h2>\ubaa9\ucc28<\/h2>\n<ul>\n<li><a href=\"#%ea%b8%b0%eb%8a%a5%ec%9d%98-%eb%8f%99%ec%a0%81-%ec%b6%94%ea%b0%80%eb%a5%bc-%ec%9c%84%ed%95%9c-%eb%8d%b0%ec%bd%94%eb%a0%88%ec%9d%b4%ed%84%b0-%ed%8c%a8%ed%84%b4%ec%9d%98-%ea%b3%a0%ea%b8%89-%ed%99%9c-fNQUXejKJa\">\uae30\ub2a5\uc758 \ub3d9\uc801 \ucd94\uac00\ub97c \uc704\ud55c \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc758 \uace0\uae09 \ud65c\uc6a9<\/a><\/li>\n<li><a href=\"#1-%eb%8d%b0%ec%bd%94%eb%a0%88%ec%9d%b4%ed%84%b0-%ed%8c%a8%ed%84%b4%ec%9d%98-%ea%b8%b0%eb%b3%b8-%ea%b0%9c%eb%85%90-fNQUXejKJa\">1. \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc758 \uae30\ubcf8 \uac1c\ub150<\/a><\/li>\n<li><a href=\"#2-%eb%8d%b0%ec%bd%94%eb%a0%88%ec%9d%b4%ed%84%b0-%ed%8c%a8%ed%84%b4%ec%9d%98-%ec%9e%a5%ec%a0%90-fNQUXejKJa\">2. \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc758 \uc7a5\uc810<\/a><\/li>\n<li><a href=\"#3-%eb%8d%b0%ec%bd%94%eb%a0%88%ec%9d%b4%ed%84%b0-%ed%8c%a8%ed%84%b4%ec%9d%98-%ea%b5%ac%ec%a1%b0-fNQUXejKJa\">3. \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc758 \uad6c\uc870<\/a><\/li>\n<li><a href=\"#4-%eb%8d%b0%ec%bd%94%eb%a0%88%ec%9d%b4%ed%84%b0-%ed%8c%a8%ed%84%b4%ec%9d%98-%ea%b3%a0%ea%b8%89-%ed%99%9c%ec%9a%a9-%ec%82%ac%eb%a1%80-fNQUXejKJa\">4. \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc758 \uace0\uae09 \ud65c\uc6a9 \uc0ac\ub840<\/a><\/li>\n<li><a href=\"#4-1-ui-%ec%bb%b4%ed%8f%ac%eb%84%8c%ed%8a%b8%ec%9d%98-%eb%8f%99%ec%a0%81-%ec%8a%a4%ed%83%80%ec%9d%bc%eb%a7%81-fNQUXejKJa\">4.1. UI \ucef4\ud3ec\ub10c\ud2b8\uc758 \ub3d9\uc801 \uc2a4\ud0c0\uc77c\ub9c1<\/a><\/li>\n<li><a href=\"#4-2-%eb%a1%9c%ea%b9%85-%eb%b0%8f-%eb%aa%a8%eb%8b%88%ed%84%b0%eb%a7%81-fNQUXejKJa\">4.2. \ub85c\uae45 \ubc0f \ubaa8\ub2c8\ud130\ub9c1<\/a><\/li>\n<li><a href=\"#4-3-%eb%8d%b0%ec%9d%b4%ed%84%b0-%ea%b2%80%ec%a6%9d-fNQUXejKJa\">4.3. \ub370\uc774\ud130 \uac80\uc99d<\/a><\/li>\n<li><a href=\"#5-%eb%8d%b0%ec%bd%94%eb%a0%88%ec%9d%b4%ed%84%b0-%ed%8c%a8%ed%84%b4%ea%b3%bc-%eb%8b%a4%eb%a5%b8-%eb%94%94%ec%9e%90%ec%9d%b8-%ed%8c%a8%ed%84%b4-%eb%b9%84%ea%b5%90-fNQUXejKJa\">5. \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uacfc \ub2e4\ub978 \ub514\uc790\uc778 \ud328\ud134 \ube44\uad50<\/a><\/li>\n<li><a href=\"#5-1-%ec%83%81%ec%86%8d-vs-%eb%8d%b0%ec%bd%94%eb%a0%88%ec%9d%b4%ed%84%b0-%ed%8c%a8%ed%84%b4-fNQUXejKJa\">5.1. \uc0c1\uc18d vs. \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134<\/a><\/li>\n<li><a href=\"#5-2-%ec%a0%84%eb%9e%b5-%ed%8c%a8%ed%84%b4-vs-%eb%8d%b0%ec%bd%94%eb%a0%88%ec%9d%b4%ed%84%b0-%ed%8c%a8%ed%84%b4-fNQUXejKJa\">5.2. \uc804\ub7b5 \ud328\ud134 vs. \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134<\/a><\/li>\n<li><a href=\"#6-%eb%8d%b0%ec%bd%94%eb%a0%88%ec%9d%b4%ed%84%b0-%ed%8c%a8%ed%84%b4%ec%9d%98-%eb%8b%a8%ec%a0%90-fNQUXejKJa\">6. \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc758 \ub2e8\uc810<\/a><\/li>\n<li><a href=\"#7-%ea%b2%b0%eb%a1%a0-fNQUXejKJa\">7. \uacb0\ub860<\/a><\/li>\n<li><a href=\"#8-%ec%b0%b8%ea%b3%a0-%ec%9e%90%eb%a3%8c-fNQUXejKJa\">8. \ucc38\uace0 \uc790\ub8cc<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h1 id=\"%ea%b8%b0%eb%8a%a5%ec%9d%98-%eb%8f%99%ec%a0%81-%ec%b6%94%ea%b0%80%eb%a5%bc-%ec%9c%84%ed%95%9c-%eb%8d%b0%ec%bd%94%eb%a0%88%ec%9d%b4%ed%84%b0-%ed%8c%a8%ed%84%b4%ec%9d%98-%ea%b3%a0%ea%b8%89-%ed%99%9c-fNQUXejKJa\">\uae30\ub2a5\uc758 \ub3d9\uc801 \ucd94\uac00\ub97c \uc704\ud55c \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc758 \uace0\uae09 \ud65c\uc6a9<\/h1>\n<p>\uc18c\ud504\ud2b8\uc6e8\uc5b4 \uac1c\ubc1c\uc5d0\uc11c \ub514\uc790\uc778 \ud328\ud134\uc740 \ucf54\ub4dc\uc758 \uc7ac\uc0ac\uc6a9\uc131\uacfc \uc720\uc9c0\ubcf4\uc218\uc131\uc744 \ub192\uc774\ub294 \uc911\uc694\ud55c \uc5ed\ud560\uc744 \ud569\ub2c8\ub2e4. \uadf8 \uc911\uc5d0\uc11c\ub3c4 \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc740 \uac1d\uccb4\uc758 \uae30\ub2a5\uc744 \ub3d9\uc801\uc73c\ub85c \ucd94\uac00\ud560 \uc218 \uc788\ub294 \uc720\uc5f0\ud55c \ubc29\ubc95\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \uc774 \uae00\uc5d0\uc11c\ub294 \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc758 \uac1c\ub150, \uc7a5\uc810, \uadf8\ub9ac\uace0 \uace0\uae09 \ud65c\uc6a9 \uc0ac\ub840\ub97c \ud1b5\ud574 \uc774 \ud328\ud134\uc774 \uc5b4\ub5bb\uac8c \uc18c\ud504\ud2b8\uc6e8\uc5b4 \uc124\uacc4\uc5d0 \uae30\uc5ec\ud558\ub294\uc9c0\ub97c \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<h2 id=\"1-%eb%8d%b0%ec%bd%94%eb%a0%88%ec%9d%b4%ed%84%b0-%ed%8c%a8%ed%84%b4%ec%9d%98-%ea%b8%b0%eb%b3%b8-%ea%b0%9c%eb%85%90-fNQUXejKJa\">1. \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc758 \uae30\ubcf8 \uac1c\ub150<\/h2>\n<p>\ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc740 \uac1d\uccb4\uc5d0 \ucd94\uac00\uc801\uc778 \ucc45\uc784\uc744 \ub3d9\uc801\uc73c\ub85c \ubd80\uc5ec\ud560 \uc218 \uc788\ub294 \uad6c\uc870\uc801 \ub514\uc790\uc778 \ud328\ud134\uc785\ub2c8\ub2e4. \uc774 \ud328\ud134\uc740 \uae30\uc874 \uac1d\uccb4\ub97c \uac10\uc2f8\ub294 \uc0c8\ub85c\uc6b4 \uac1d\uccb4\ub97c \uc0dd\uc131\ud558\uc5ec, \uc6d0\ub798 \uac1d\uccb4\uc758 \uae30\ub2a5\uc744 \ud655\uc7a5\ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \uae30\ub2a5\uc744 \ucd94\uac00\ud558\uac70\ub098 \ubcc0\uacbd\ud560 \uc218 \uc788\uc73c\uba70, \uae30\uc874 \ucf54\ub4dc\ub97c \uc218\uc815\ud558\uc9c0 \uc54a\uace0\ub3c4 \uc0c8\ub85c\uc6b4 \uae30\ub2a5\uc744 \uad6c\ud604\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc740 \uc8fc\ub85c \ub2e4\uc74c\uacfc \uac19\uc740 \uc0c1\ud669\uc5d0\uc11c \uc720\uc6a9\ud569\ub2c8\ub2e4:<\/p>\n<ul>\n<li>\uae30\ub2a5\uc744 \ub3d9\uc801\uc73c\ub85c \ucd94\uac00\ud574\uc57c \ud560 \ub54c<\/li>\n<li>\uae30\uc874 \ud074\ub798\uc2a4\ub97c \uc218\uc815\ud558\uc9c0 \uc54a\uace0\ub3c4 \uae30\ub2a5\uc744 \ud655\uc7a5\ud574\uc57c \ud560 \ub54c<\/li>\n<li>\uc5ec\ub7ec \uac00\uc9c0 \uae30\ub2a5\uc744 \uc870\ud569\ud558\uc5ec \uc0ac\uc6a9\ud560 \ub54c<\/li>\n<\/ul>\n<p>\uc608\ub97c \ub4e4\uc5b4, \ucee4\ud53c\ub97c \ud310\ub9e4\ud558\ub294 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc744 \uc0dd\uac01\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uae30\ubcf8 \ucee4\ud53c \ud074\ub798\uc2a4\uac00 \uc788\uc744 \ub54c, \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc744 \uc0ac\uc6a9\ud558\uc5ec \ub2e4\uc591\ud55c \ucd94\uac00 \uae30\ub2a5(\uc6b0\uc720, \uc124\ud0d5 \ub4f1)\uc744 \ub3d9\uc801\uc73c\ub85c \ucd94\uac00\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<pre><code>class Coffee {\n    public String getDescription() {\n        return \"Basic Coffee\";\n    }\n    \n    public double cost() {\n        return 2.00;\n    }\n}\n\nclass MilkDecorator extends Coffee {\n    private Coffee coffee;\n\n    public MilkDecorator(Coffee coffee) {\n        this.coffee = coffee;\n    }\n\n    @Override\n    public String getDescription() {\n        return coffee.getDescription() + \", Milk\";\n    }\n\n    @Override\n    public double cost() {\n        return coffee.cost() + 0.50;\n    }\n}\n<\/code><\/pre>\n<p>\uc704\uc758 \uc608\uc81c\uc5d0\uc11c MilkDecorator\ub294 Coffee \uac1d\uccb4\ub97c \uac10\uc2f8\uace0, getDescription()\uacfc cost() \uba54\uc11c\ub4dc\ub97c \uc624\ubc84\ub77c\uc774\ub4dc\ud558\uc5ec \uae30\ub2a5\uc744 \ud655\uc7a5\ud569\ub2c8\ub2e4. \uc774\ucc98\ub7fc \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc740 \uac1d\uccb4\uc758 \uae30\ub2a5\uc744 \uc720\uc5f0\ud558\uac8c \ucd94\uac00\ud560 \uc218 \uc788\ub294 \uac15\ub825\ud55c \ub3c4\uad6c\uc785\ub2c8\ub2e4.<\/p>\n<h2 id=\"2-%eb%8d%b0%ec%bd%94%eb%a0%88%ec%9d%b4%ed%84%b0-%ed%8c%a8%ed%84%b4%ec%9d%98-%ec%9e%a5%ec%a0%90-fNQUXejKJa\">2. \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc758 \uc7a5\uc810<\/h2>\n<p>\ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc740 \uc5ec\ub7ec \uac00\uc9c0 \uc7a5\uc810\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \uc774 \uc139\uc158\uc5d0\uc11c\ub294 \uadf8 \uc8fc\uc694 \uc7a5\uc810\ub4e4\uc744 \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<ul>\n<li><strong>\uc720\uc5f0\uc131:<\/strong> \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc740 \uae30\ub2a5\uc744 \ub3d9\uc801\uc73c\ub85c \ucd94\uac00\ud560 \uc218 \uc788\uc5b4, \ud544\uc694\uc5d0 \ub530\ub77c \ub2e4\uc591\ud55c \uc870\ud569\uc73c\ub85c \uac1d\uccb4\ub97c \uad6c\uc131\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<li><strong>\ud655\uc7a5\uc131:<\/strong> \uc0c8\ub85c\uc6b4 \uae30\ub2a5\uc744 \ucd94\uac00\ud560 \ub54c \uae30\uc874 \ucf54\ub4dc\ub97c \uc218\uc815\ud560 \ud544\uc694\uac00 \uc5c6\uc73c\ubbc0\ub85c, \ucf54\ub4dc\uc758 \uc548\uc815\uc131\uc744 \ub192\uc77c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<li><strong>\ub2e8\uc77c \ucc45\uc784 \uc6d0\uce59:<\/strong> \uac01 \ub370\ucf54\ub808\uc774\ud130\ub294 \ud2b9\uc815 \uae30\ub2a5\ub9cc\uc744 \ub2f4\ub2f9\ud558\ubbc0\ub85c, \ucf54\ub4dc\uc758 \uac00\ub3c5\uc131\uacfc \uc720\uc9c0\ubcf4\uc218\uc131\uc774 \ud5a5\uc0c1\ub429\ub2c8\ub2e4.<\/li>\n<li><strong>\uc7ac\uc0ac\uc6a9\uc131:<\/strong> \uc5ec\ub7ec \uac1d\uccb4\uc5d0\uc11c \ub3d9\uc77c\ud55c \ub370\ucf54\ub808\uc774\ud130\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc5b4, \ucf54\ub4dc\uc758 \uc7ac\uc0ac\uc6a9\uc131\uc774 \ub192\uc544\uc9d1\ub2c8\ub2e4.<\/li>\n<\/ul>\n<p>\uc774\ub7ec\ud55c \uc7a5\uc810\ub4e4\uc740 \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc774 \uc18c\ud504\ud2b8\uc6e8\uc5b4 \uc124\uacc4\uc5d0\uc11c \ub110\ub9ac \uc0ac\uc6a9\ub418\ub294 \uc774\uc720\uc785\ub2c8\ub2e4. \ud2b9\ud788, \ub300\uaddc\ubaa8 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc5d0\uc11c \uae30\ub2a5\uc744 \ub3d9\uc801\uc73c\ub85c \ucd94\uac00\ud574\uc57c \ud560 \ub54c \ub9e4\uc6b0 \uc720\uc6a9\ud569\ub2c8\ub2e4.<\/p>\n<h2 id=\"3-%eb%8d%b0%ec%bd%94%eb%a0%88%ec%9d%b4%ed%84%b0-%ed%8c%a8%ed%84%b4%ec%9d%98-%ea%b5%ac%ec%a1%b0-fNQUXejKJa\">3. \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc758 \uad6c\uc870<\/h2>\n<p>\ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc740 \ub2e4\uc74c\uacfc \uac19\uc740 \uad6c\uc870\ub85c \uc774\ub8e8\uc5b4\uc838 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n<ul>\n<li><strong>\ucef4\ud3ec\ub10c\ud2b8(Component):<\/strong> \uae30\ubcf8 \uc778\ud130\ud398\uc774\uc2a4 \ub610\ub294 \ucd94\uc0c1 \ud074\ub798\uc2a4\uc785\ub2c8\ub2e4. \ubaa8\ub4e0 \ub370\ucf54\ub808\uc774\ud130\uc640 \uc2e4\uc81c \uac1d\uccb4\uac00 \uc774 \uc778\ud130\ud398\uc774\uc2a4\ub97c \uad6c\ud604\ud569\ub2c8\ub2e4.<\/li>\n<li><strong>\ucf58\ud06c\ub9ac\ud2b8 \ucef4\ud3ec\ub10c\ud2b8(Concrete Component):<\/strong> \ucef4\ud3ec\ub10c\ud2b8 \uc778\ud130\ud398\uc774\uc2a4\ub97c \uad6c\ud604\ud55c \uc2e4\uc81c \uac1d\uccb4\uc785\ub2c8\ub2e4.<\/li>\n<li><strong>\ub370\ucf54\ub808\uc774\ud130(Decorator):<\/strong> \ucef4\ud3ec\ub10c\ud2b8\ub97c \uac10\uc2f8\ub294 \ucd94\uc0c1 \ud074\ub798\uc2a4\uc785\ub2c8\ub2e4. \uc774 \ud074\ub798\uc2a4\ub294 \ucef4\ud3ec\ub10c\ud2b8 \uc778\ud130\ud398\uc774\uc2a4\ub97c \uad6c\ud604\ud558\uba70, \uc2e4\uc81c \ucef4\ud3ec\ub10c\ud2b8\ub97c \ucc38\uc870\ud569\ub2c8\ub2e4.<\/li>\n<li><strong>\ucf58\ud06c\ub9ac\ud2b8 \ub370\ucf54\ub808\uc774\ud130(Concrete Decorator):<\/strong> \ub370\ucf54\ub808\uc774\ud130 \ud074\ub798\uc2a4\ub97c \uc0c1\uc18d\ubc1b\uc544, \ucd94\uac00\uc801\uc778 \uae30\ub2a5\uc744 \uad6c\ud604\ud558\ub294 \ud074\ub798\uc2a4\uc785\ub2c8\ub2e4.<\/li>\n<\/ul>\n<p>\uc774 \uad6c\uc870\ub97c \ud1b5\ud574, \ud074\ub77c\uc774\uc5b8\ud2b8\ub294 \ucef4\ud3ec\ub10c\ud2b8\ub97c \uc0ac\uc6a9\ud558\uc5ec \ub2e4\uc591\ud55c \uae30\ub2a5\uc744 \uc870\ud569\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \ucee4\ud53c \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc5d0\uc11c \uae30\ubcf8 \ucee4\ud53c\uc5d0 \uc6b0\uc720\uc640 \uc124\ud0d5\uc744 \ucd94\uac00\ud558\ub294 \uacbd\uc6b0, \ub2e4\uc74c\uacfc \uac19\uc740 \uad6c\uc870\uac00 \ub420 \uac83\uc785\ub2c8\ub2e4.<\/p>\n<pre><code>Coffee coffee = new MilkDecorator(new SugarDecorator(new BasicCoffee()));\n<\/code><\/pre>\n<p>\uc774\ucc98\ub7fc \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc740 \uac1d\uccb4\uc758 \uae30\ub2a5\uc744 \uc870\ud569\ud558\uc5ec \uc720\uc5f0\ud558\uac8c \uc0ac\uc6a9\ud560 \uc218 \uc788\ub294 \ubc29\ubc95\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/p>\n<h2 id=\"4-%eb%8d%b0%ec%bd%94%eb%a0%88%ec%9d%b4%ed%84%b0-%ed%8c%a8%ed%84%b4%ec%9d%98-%ea%b3%a0%ea%b8%89-%ed%99%9c%ec%9a%a9-%ec%82%ac%eb%a1%80-fNQUXejKJa\">4. \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc758 \uace0\uae09 \ud65c\uc6a9 \uc0ac\ub840<\/h2>\n<p>\ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc740 \ub2e4\uc591\ud55c \ubd84\uc57c\uc5d0\uc11c \ud65c\uc6a9\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \uc139\uc158\uc5d0\uc11c\ub294 \uba87 \uac00\uc9c0 \uace0\uae09 \ud65c\uc6a9 \uc0ac\ub840\ub97c \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<h3 id=\"4-1-ui-%ec%bb%b4%ed%8f%ac%eb%84%8c%ed%8a%b8%ec%9d%98-%eb%8f%99%ec%a0%81-%ec%8a%a4%ed%83%80%ec%9d%bc%eb%a7%81-fNQUXejKJa\">4.1. UI \ucef4\ud3ec\ub10c\ud2b8\uc758 \ub3d9\uc801 \uc2a4\ud0c0\uc77c\ub9c1<\/h3>\n<p>\uc6f9 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc5d0\uc11c UI \ucef4\ud3ec\ub10c\ud2b8\uc5d0 \ub2e4\uc591\ud55c \uc2a4\ud0c0\uc77c\uc744 \ub3d9\uc801\uc73c\ub85c \uc801\uc6a9\ud574\uc57c \ud560 \ub54c, \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc774 \uc720\uc6a9\ud569\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \ubc84\ud2bc \ucef4\ud3ec\ub10c\ud2b8\uc5d0 \ub2e4\uc591\ud55c \uc2a4\ud0c0\uc77c(\uc0c9\uc0c1, \ud06c\uae30 \ub4f1)\uc744 \ucd94\uac00\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<pre><code>class Button {\n    public String render() {\n        return \"Button\";\n    }\n}\n\nclass RedButtonDecorator extends Button {\n    private Button button;\n\n    public RedButtonDecorator(Button button) {\n        this.button = button;\n    }\n\n    @Override\n    public String render() {\n        return \"<span style='color:red'>\" + button.render() + \"<\/span>\";\n    }\n}\n<\/code><\/pre>\n<p>\uc704\uc758 \uc608\uc81c\uc5d0\uc11c RedButtonDecorator\ub294 Button \uac1d\uccb4\ub97c \uac10\uc2f8\uace0, render() \uba54\uc11c\ub4dc\ub97c \uc624\ubc84\ub77c\uc774\ub4dc\ud558\uc5ec \ubc84\ud2bc\uc758 \uc0c9\uc0c1\uc744 \ubcc0\uacbd\ud569\ub2c8\ub2e4. \uc774\ucc98\ub7fc UI \ucef4\ud3ec\ub10c\ud2b8\uc5d0 \ub2e4\uc591\ud55c \uc2a4\ud0c0\uc77c\uc744 \ub3d9\uc801\uc73c\ub85c \uc801\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h3 id=\"4-2-%eb%a1%9c%ea%b9%85-%eb%b0%8f-%eb%aa%a8%eb%8b%88%ed%84%b0%eb%a7%81-fNQUXejKJa\">4.2. \ub85c\uae45 \ubc0f \ubaa8\ub2c8\ud130\ub9c1<\/h3>\n<p>\uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc5d0\uc11c \ub85c\uae45 \ubc0f \ubaa8\ub2c8\ud130\ub9c1 \uae30\ub2a5\uc744 \ucd94\uac00\ud560 \ub54c\ub3c4 \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc774 \uc720\uc6a9\ud569\ub2c8\ub2e4. \uae30\uc874 \uc11c\ube44\uc2a4\uc5d0 \ub85c\uae45 \uae30\ub2a5\uc744 \ucd94\uac00\ud558\uc5ec, \uc11c\ube44\uc2a4 \ud638\ucd9c \uc2dc \ub85c\uadf8\ub97c \uae30\ub85d\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<pre><code>class UserService {\n    public void login(String username) {\n        \/\/ \ub85c\uadf8\uc778 \ub85c\uc9c1\n    }\n}\n\nclass LoggingDecorator extends UserService {\n    private UserService userService;\n\n    public LoggingDecorator(UserService userService) {\n        this.userService = userService;\n    }\n\n    @Override\n    public void login(String username) {\n        System.out.println(\"User \" + username + \" is trying to log in.\");\n        userService.login(username);\n        System.out.println(\"User \" + username + \" has logged in.\");\n    }\n}\n<\/code><\/pre>\n<p>\uc704\uc758 \uc608\uc81c\uc5d0\uc11c LoggingDecorator\ub294 UserService \uac1d\uccb4\ub97c \uac10\uc2f8\uace0, login() \uba54\uc11c\ub4dc\ub97c \uc624\ubc84\ub77c\uc774\ub4dc\ud558\uc5ec \ub85c\uadf8\ub97c \uae30\ub85d\ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \uc11c\ube44\uc2a4 \ud638\ucd9c \uc2dc \ub85c\uae45 \uae30\ub2a5\uc744 \ub3d9\uc801\uc73c\ub85c \ucd94\uac00\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h3 id=\"4-3-%eb%8d%b0%ec%9d%b4%ed%84%b0-%ea%b2%80%ec%a6%9d-fNQUXejKJa\">4.3. \ub370\uc774\ud130 \uac80\uc99d<\/h3>\n<p>\ub370\uc774\ud130 \uac80\uc99d \uae30\ub2a5\uc744 \ucd94\uac00\ud560 \ub54c\ub3c4 \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc774 \uc720\uc6a9\ud569\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uc0ac\uc6a9\uc790 \uc785\ub825 \ub370\uc774\ud130\ub97c \uac80\uc99d\ud558\ub294 \uae30\ub2a5\uc744 \uae30\uc874 \uc11c\ube44\uc2a4\uc5d0 \ucd94\uac00\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<pre><code>class UserRegistrationService {\n    public void register(String username) {\n        \/\/ \uc0ac\uc6a9\uc790 \ub4f1\ub85d \ub85c\uc9c1\n    }\n}\n\nclass ValidationDecorator extends UserRegistrationService {\n    private UserRegistrationService userRegistrationService;\n\n    public ValidationDecorator(UserRegistrationService userRegistrationService) {\n        this.userRegistrationService = userRegistrationService;\n    }\n\n    @Override\n    public void register(String username) {\n        if (username == null || username.isEmpty()) {\n            throw new IllegalArgumentException(\"Username cannot be empty\");\n        }\n        userRegistrationService.register(username);\n    }\n}\n<\/code><\/pre>\n<p>\uc704\uc758 \uc608\uc81c\uc5d0\uc11c ValidationDecorator\ub294 UserRegistrationService \uac1d\uccb4\ub97c \uac10\uc2f8\uace0, register() \uba54\uc11c\ub4dc\ub97c \uc624\ubc84\ub77c\uc774\ub4dc\ud558\uc5ec \uc785\ub825 \ub370\uc774\ud130 \uac80\uc99d \uae30\ub2a5\uc744 \ucd94\uac00\ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ub370\uc774\ud130 \uac80\uc99d \uae30\ub2a5\uc744 \ub3d9\uc801\uc73c\ub85c \ucd94\uac00\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h2 id=\"5-%eb%8d%b0%ec%bd%94%eb%a0%88%ec%9d%b4%ed%84%b0-%ed%8c%a8%ed%84%b4%ea%b3%bc-%eb%8b%a4%eb%a5%b8-%eb%94%94%ec%9e%90%ec%9d%b8-%ed%8c%a8%ed%84%b4-%eb%b9%84%ea%b5%90-fNQUXejKJa\">5. \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uacfc \ub2e4\ub978 \ub514\uc790\uc778 \ud328\ud134 \ube44\uad50<\/h2>\n<p>\ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc740 \ub2e4\ub978 \ub514\uc790\uc778 \ud328\ud134\uacfc \ube44\uad50\ud588\uc744 \ub54c \uba87 \uac00\uc9c0 \ucc28\ubcc4\uc810\uc774 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \uc139\uc158\uc5d0\uc11c\ub294 \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uacfc \ub2e4\ub978 \ub514\uc790\uc778 \ud328\ud134(\uc0c1\uc18d, \uc804\ub7b5 \ud328\ud134 \ub4f1)\uc758 \ucc28\uc774\uc810\uc744 \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<h3 id=\"5-1-%ec%83%81%ec%86%8d-vs-%eb%8d%b0%ec%bd%94%eb%a0%88%ec%9d%b4%ed%84%b0-%ed%8c%a8%ed%84%b4-fNQUXejKJa\">5.1. \uc0c1\uc18d vs. \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134<\/h3>\n<p>\uc0c1\uc18d\uc740 \ud074\ub798\uc2a4 \uac04\uc758 \uad00\uacc4\ub97c \uc815\uc758\ud558\ub294 \ubc29\ubc95\uc73c\ub85c, \ubd80\ubaa8 \ud074\ub798\uc2a4\uc758 \uae30\ub2a5\uc744 \uc790\uc2dd \ud074\ub798\uc2a4\uac00 \ubb3c\ub824\ubc1b\uc2b5\ub2c8\ub2e4. \ubc18\uba74, \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc740 \uac1d\uccb4\ub97c \uac10\uc2f8\ub294 \ubc29\uc2dd\uc73c\ub85c \uae30\ub2a5\uc744 \ud655\uc7a5\ud569\ub2c8\ub2e4. \uc0c1\uc18d\uc740 \uc815\uc801\uc774\uba70, \ucef4\ud30c\uc77c \ud0c0\uc784\uc5d0 \uacb0\uc815\ub418\uc9c0\ub9cc, \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc740 \ub3d9\uc801\uc774\uba70 \ub7f0\ud0c0\uc784\uc5d0 \uacb0\uc815\ub429\ub2c8\ub2e4.<\/p>\n<h3 id=\"5-2-%ec%a0%84%eb%9e%b5-%ed%8c%a8%ed%84%b4-vs-%eb%8d%b0%ec%bd%94%eb%a0%88%ec%9d%b4%ed%84%b0-%ed%8c%a8%ed%84%b4-fNQUXejKJa\">5.2. \uc804\ub7b5 \ud328\ud134 vs. \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134<\/h3>\n<p>\uc804\ub7b5 \ud328\ud134\uc740 \uc54c\uace0\ub9ac\uc998\uc744 \ucea1\uc290\ud654\ud558\uc5ec \ud074\ub77c\uc774\uc5b8\ud2b8\uac00 \ub7f0\ud0c0\uc784\uc5d0 \uc54c\uace0\ub9ac\uc998\uc744 \uc120\ud0dd\ud560 \uc218 \uc788\ub3c4\ub85d \ud569\ub2c8\ub2e4. \ubc18\uba74, \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc740 \uac1d\uccb4\uc758 \uae30\ub2a5\uc744 \ub3d9\uc801\uc73c\ub85c \ucd94\uac00\ud558\ub294 \ub370 \uc911\uc810\uc744 \ub461\ub2c8\ub2e4. \ub450 \ud328\ud134 \ubaa8\ub450 \uc720\uc5f0\uc131\uc744 \uc81c\uacf5\ud558\uc9c0\ub9cc, \uc0ac\uc6a9\ub418\ub294 \ubaa9\uc801\uc774 \ub2e4\ub985\ub2c8\ub2e4.<\/p>\n<h2 id=\"6-%eb%8d%b0%ec%bd%94%eb%a0%88%ec%9d%b4%ed%84%b0-%ed%8c%a8%ed%84%b4%ec%9d%98-%eb%8b%a8%ec%a0%90-fNQUXejKJa\">6. \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc758 \ub2e8\uc810<\/h2>\n<p>\ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc740 \ub9ce\uc740 \uc7a5\uc810\uc744 \uac00\uc9c0\uace0 \uc788\uc9c0\ub9cc, \uba87 \uac00\uc9c0 \ub2e8\uc810\ub3c4 \uc874\uc7ac\ud569\ub2c8\ub2e4. \uc774 \uc139\uc158\uc5d0\uc11c\ub294 \uadf8 \ub2e8\uc810\ub4e4\uc744 \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<ul>\n<li><strong>\ubcf5\uc7a1\uc131:<\/strong> \uc5ec\ub7ec \uac1c\uc758 \ub370\ucf54\ub808\uc774\ud130\uac00 \uc911\ucca9\ub420 \uacbd\uc6b0, \ucf54\ub4dc\uac00 \ubcf5\uc7a1\ud574\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub294 \uac00\ub3c5\uc131\uc744 \ub5a8\uc5b4\ub728\ub9b4 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<li><strong>\uc131\ub2a5 \uc800\ud558:<\/strong> \ub9ce\uc740 \ub370\ucf54\ub808\uc774\ud130\uac00 \uc911\ucca9\ub420 \uacbd\uc6b0, \uc131\ub2a5 \uc800\ud558\uac00 \ubc1c\uc0dd\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uac01 \ub370\ucf54\ub808\uc774\ud130\uac00 \uba54\uc11c\ub4dc\ub97c \uc624\ubc84\ub77c\uc774\ub4dc\ud558\uae30 \ub54c\ubb38\uc5d0 \ud638\ucd9c \ube44\uc6a9\uc774 \uc99d\uac00\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<\/ul>\n<p>\ub530\ub77c\uc11c \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc744 \uc0ac\uc6a9\ud560 \ub54c\ub294 \uc774\ub7ec\ud55c \ub2e8\uc810\uc744 \uace0\ub824\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n<h2 id=\"7-%ea%b2%b0%eb%a1%a0-fNQUXejKJa\">7. \uacb0\ub860<\/h2>\n<p>\ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc740 \uc18c\ud504\ud2b8\uc6e8\uc5b4 \uc124\uacc4\uc5d0\uc11c \ub9e4\uc6b0 \uc720\uc6a9\ud55c \ub3c4\uad6c\uc785\ub2c8\ub2e4. \uc774 \ud328\ud134\uc740 \uac1d\uccb4\uc758 \uae30\ub2a5\uc744 \ub3d9\uc801\uc73c\ub85c \ucd94\uac00\ud560 \uc218 \uc788\ub294 \uc720\uc5f0\uc131\uc744 \uc81c\uacf5\ud558\uba70, \ucf54\ub4dc\uc758 \uc7ac\uc0ac\uc6a9\uc131\uacfc \uc720\uc9c0\ubcf4\uc218\uc131\uc744 \ub192\uc774\ub294 \ub370 \uae30\uc5ec\ud569\ub2c8\ub2e4. \ub2e4\uc591\ud55c \ud65c\uc6a9 \uc0ac\ub840\ub97c \ud1b5\ud574 \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc774 \uc5b4\ub5bb\uac8c \uc2e4\uc81c \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc5d0\uc11c \uc0ac\uc6a9\ub420 \uc218 \uc788\ub294\uc9c0\ub97c \uc0b4\ud3b4\ubcf4\uc558\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\uadf8\ub7ec\ub098 \uc774 \ud328\ud134\uc740 \ubcf5\uc7a1\uc131\uc744 \uc99d\uac00\uc2dc\ud0ac \uc218 \uc788\uc73c\uba70, \uc131\ub2a5 \uc800\ud558\uac00 \ubc1c\uc0dd\ud560 \uc218 \uc788\uc73c\ubbc0\ub85c \uc2e0\uc911\ud558\uac8c \uc0ac\uc6a9\ud574\uc57c \ud569\ub2c8\ub2e4. \uc801\uc808\ud55c \uc0c1\ud669\uc5d0\uc11c \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc744 \ud65c\uc6a9\ud55c\ub2e4\uba74, \uc18c\ud504\ud2b8\uc6e8\uc5b4 \uac1c\ubc1c\uc5d0 \ud070 \ub3c4\uc6c0\uc774 \ub420 \uac83\uc785\ub2c8\ub2e4.<\/p>\n<h2 id=\"8-%ec%b0%b8%ea%b3%a0-%ec%9e%90%eb%a3%8c-fNQUXejKJa\">8. \ucc38\uace0 \uc790\ub8cc<\/h2>\n<p>\uc774 \uae00\uc5d0\uc11c \ub2e4\ub8ec \ub0b4\uc6a9\uc5d0 \ub300\ud55c \ub354 \uae4a\uc740 \uc774\ud574\ub97c \uc6d0\ud558\uc2e0\ub2e4\uba74 \ub2e4\uc74c \uc790\ub8cc\ub4e4\uc744 \ucc38\uace0\ud558\uc2dc\uae30 \ubc14\ub78d\ub2c8\ub2e4:<\/p>\n<ul>\n<li><a href=\"https:\/\/refactoring.guru\/design-patterns\/decorator\" target=\"_blank\" rel=\"noopener\">Refactoring Guru &#8211; Decorator Pattern<\/a><\/li>\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Decorator_pattern\" target=\"_blank\" rel=\"noopener\">Wikipedia &#8211; Decorator Pattern<\/a><\/li>\n<li><a href=\"https:\/\/www.dofactory.com\/net\/decorator-design-pattern\" target=\"_blank\" rel=\"noopener\">DoFactory &#8211; Decorator Design Pattern<\/a><\/li>\n<\/ul>\n<p>\uc774 \uc790\ub8cc\ub4e4\uc740 \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc5d0 \ub300\ud55c \ub354 \ub9ce\uc740 \uc815\ubcf4\uc640 \uc608\uc81c\ub97c \uc81c\uacf5\ud569\ub2c8\ub2e4. \uc18c\ud504\ud2b8\uc6e8\uc5b4 \uc124\uacc4\uc5d0\uc11c \ub514\uc790\uc778 \ud328\ud134\uc758 \uc911\uc694\uc131\uc744 \uc774\ud574\ud558\uace0, \uc774\ub97c \ud1b5\ud574 \ub354 \ub098\uc740 \ucf54\ub4dc\ub97c \uc791\uc131\ud558\ub294 \ub370 \ub3c4\uc6c0\uc774 \ub418\uae38 \ubc14\ub78d\ub2c8\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ubaa9\ucc28 \uae30\ub2a5\uc758 \ub3d9\uc801 \ucd94\uac00\ub97c \uc704\ud55c \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc758 \uace0\uae09 \ud65c\uc6a9 1. \ub370\ucf54\ub808\uc774\ud130 \ud328\ud134\uc758 \uae30\ubcf8 \uac1c\ub150 2. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":33704,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1957],"tags":[2754,2705],"class_list":["post-50769","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-development","tag-component","tag-decorator"],"acf":[],"_links":{"self":[{"href":"https:\/\/8gfg.shop\/blog\/wp-json\/wp\/v2\/posts\/50769","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/8gfg.shop\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/8gfg.shop\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/8gfg.shop\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/8gfg.shop\/blog\/wp-json\/wp\/v2\/comments?post=50769"}],"version-history":[{"count":0,"href":"https:\/\/8gfg.shop\/blog\/wp-json\/wp\/v2\/posts\/50769\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/8gfg.shop\/blog\/wp-json\/wp\/v2\/media\/33704"}],"wp:attachment":[{"href":"https:\/\/8gfg.shop\/blog\/wp-json\/wp\/v2\/media?parent=50769"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/8gfg.shop\/blog\/wp-json\/wp\/v2\/categories?post=50769"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/8gfg.shop\/blog\/wp-json\/wp\/v2\/tags?post=50769"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}