{"id":649,"date":"2013-02-24T21:19:36","date_gmt":"2013-02-24T20:19:36","guid":{"rendered":"http:\/\/www.badral.net\/?p=649"},"modified":"2013-03-14T14:31:03","modified_gmt":"2013-03-14T13:31:03","slug":"telescoping-constructor-pattern","status":"publish","type":"post","link":"https:\/\/www.badral.net\/?p=649","title":{"rendered":"Telescoping constructor pattern"},"content":{"rendered":"

\u042d\u043d\u044d \u043d\u044d\u0440\u0438\u0439\u0433 \u0445\u0430\u0440\u0430\u0430\u0434 \u0437\u0430\u0440\u0438\u043c \u0445\u04af\u043c\u04af\u04af\u0441 \u043e\u0433\u0442 \u0441\u043e\u043d\u0441\u043e\u043e\u0433\u04af\u0439 \u0431\u0430\u0439\u0436 \u0431\u043e\u043b\u043d\u043e. \u041d\u044d\u0440\u0438\u0439\u0433 \u043d\u044c \u043c\u044d\u0434\u044d\u0445\u0433\u04af\u0439 \u0447 \u0431\u04af\u0445 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0441\u0442\u0443\u0443\u0434\u044b\u043d \u04e9\u0434\u04e9\u0440 \u0442\u0443\u0442\u0430\u043c\u0434\u0430\u0430 \u0445\u044d\u0440\u044d\u0433\u043b\u044d\u0434\u044d\u0433 \u043f\u0430\u0442\u0442\u0435\u0440\u043d.
\n\u0414\u043e\u043e\u0440\u0445 \u043a\u043e\u0434\u044b\u0433 \u0445\u0430\u0440\u043d\u0430 \u0443\u0443.<\/p>\n

Ger(int hana) { … }
\nGer(int hana, int burees) { … }
\nGer(int hana, int burees, boolean shallasan) { … }
\nGer(int hana, int burees, boolean shallasan, boolean ereelsen) { … }<\/p><\/blockquote>\n

\u04ae\u04af\u043d\u0434 \u0413\u044d\u0440 \u0433\u044d\u0441\u044d\u043d \u043e\u0431\u044a\u0435\u043a\u0442\u044b\u0433 \u04af\u04af\u0441\u0433\u044d\u0436 \u0431\u0430\u0439\u043d\u0430. \u0413\u044d\u0440 \u0431\u0430\u0440\u0438\u0445\u0430\u0434 \u0445\u044d\u0434\u044d\u043d \u0445\u0430\u043d\u0430\u0442\u0430\u0439 \u0431\u0430\u0439\u0445 \u043d\u044c \u044d\u0445\u043b\u044d\u044d\u0434 \u0437\u0430\u0439\u043b\u0448\u0433\u04af\u0439 \u0442\u043e\u0433\u0442\u043e\u043e\u0441\u043e\u043d \u0431\u0430\u0439\u0445 \u0451\u0441\u0442\u043e\u0439 \u0437\u04af\u0439\u043b. \u0422\u0430 \u0431\u0438\u0434\u043d\u0438\u0439 \u04e9\u0434\u04e9\u0440 \u0442\u0443\u0442\u0430\u043c \u0445\u044d\u0440\u044d\u0433\u043b\u044d\u0434\u044d\u0433 \u0433\u044d\u0440\u04af\u04af\u0434 5 \u0445\u0430\u043d\u0430\u0442\u0430\u0439 \u0431\u0430\u0439\u0434\u0430\u0433 \u0442\u0443\u043b hana \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0435\u0440\u044b\u043d \u04e9\u0433\u04e9\u0433\u0434\u043c\u04e9\u043b \u0431\u0443\u044e\u0443 Default \u0443\u0442\u0433\u044b\u0433 5 \u0433\u044d\u0436 \u0430\u0432\u0447 \u0431\u043e\u043b\u043d\u043e.
\n\u0413\u044d\u0440\u0438\u0439\u043d \u0434\u044d\u044d\u0432\u044d\u0440 \u043d\u044c \u0438\u0445\u044d\u043d\u0445\u0434\u044d\u044d 2 \u0434\u0430\u0432\u0445\u0430\u0440 \u0431\u04af\u0440\u044d\u044d\u0441\u0442\u044d\u0439 \u0431\u0430\u0439\u0434\u0430\u0433 \u0447 1-\u0441 \u044d\u0445\u043b\u044d\u044d\u0434 \u0445\u044d\u0434\u044d\u043d \u0447 \u0434\u0430\u0432\u0445\u0430\u0440 \u0431\u04af\u0440\u044d\u044d\u0441\u0442\u044d\u0439 \u0431\u0430\u0439\u0436 \u0431\u043e\u043b\u043d\u043e. \u0413\u044d\u0440 \u0448\u0430\u043b\u0442\u0430\u0439 \u0447 \u0431\u0430\u0439\u0436 \u0431\u043e\u043b\u043d\u043e, \u0448\u0430\u043b\u0433\u04af\u0439 \u0447 \u0431\u0430\u0439\u0436 \u0431\u043e\u043b\u043d\u043e. \u0417\u0443\u043d\u044b \u0433\u044d\u0440 \u0448\u0430\u043b\u0433\u04af\u0439 \u0431\u0430\u0439\u0445 \u043d\u044c \u044d\u043b\u0431\u044d\u0433. \u0422\u0438\u0439\u043c\u044d\u044d\u0441 \u0448\u0430\u043b\u043b\u0430\u0441\u0430\u043d(shallasan) \u044d\u0441\u044d\u0445 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u0438\u0439\u0433 \u0431\u04af\u04af\u043b\u0438\u0439\u043d \u0442\u04e9\u0440\u04e9\u043b\u0442\u044d\u0439 \u0430\u0432\u0430\u0432. Ereelsen \u0433\u044d\u0441\u044d\u043d \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0435\u0440 \u043d\u044c \u0433\u044d\u0440\u0438\u0439\u0433 \u044d\u0440\u044d\u044d\u043b\u0441\u044d\u043d \u044d\u0441\u044d\u0445\u0438\u0439\u0433 \u0437\u0430\u0430\u043d\u0430. (\u0413\u044d\u0440\u0438\u0439\u043d \u0442\u043e\u043e\u043d\u043e, \u0443\u043d\u044c, \u0445\u0430\u043d\u0430 \u043d\u044c \u0434\u043e\u0442\u0440\u043e\u043e \u0431\u0430\u0430\u0445\u0430\u043d \u0445\u044d\u044d \u0443\u0433\u0430\u043b\u0437 \u0431\u043e\u043b\u043e\u043e\u0434 \u044f\u0432\u0447\u0438\u0445\u0441\u0430\u043d \u0447 \u0431\u0438\u0439. \u0414\u0430\u043d \u0431\u0443\u0434\u0430\u0433\u0442\u0430\u0439 \u044d\u0441\u0432\u044d\u043b \u043e\u0433\u0442 \u0431\u0443\u0434\u0430\u0433\u0433\u04af\u0439 \u0447 \u0431\u0438\u0439.)
\n\u042d\u043d\u044d \u043c\u044d\u0442 \u044f\u043d\u0437 \u0431\u04af\u0440\u0438\u0439\u043d \u043e\u0431\u044c\u0435\u043a\u0442 \u04af\u04af\u0441\u0433\u044d\u0445\u044d\u0434 \u0431\u0438\u0434 \u0434\u044d\u044d\u0440\u0445 \u043c\u0430\u044f\u0433\u0430\u0430\u0440 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0435\u0440\u04af\u04af\u0434\u0438\u0439\u0433 \u043d\u044c \u04e9\u0433\u04e9\u04e9\u0434 \u04af\u04af\u0441\u0433\u044d\u044d\u0434 \u044f\u0432\u0434\u0430\u0433. \u04ae\u04af\u043d\u0438\u0439\u0433 \u043b \u043f\u0440\u043e\u0433\u0440\u0430\u043c \u0445\u0430\u043d\u0433\u0430\u043c\u0436\u0438\u0439\u043d \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u0447\u0438\u0434 Telescoping constructor pattern \u0433\u044d\u0436 \u043d\u044d\u0440\u043b\u044d\u0434\u044d\u0433.
\n\u0413\u044d\u0445\u0434\u044d\u044d \u0442\u0443\u0445\u0430\u0439\u043d \u043e\u0431\u044c\u0435\u043a\u0442 \u0445\u044d\u0440 \u0442\u04e9\u0432\u04e9\u0433\u0442\u044d\u0439\u0433\u044d\u044d\u0441 \u0445\u0430\u043c\u0430\u0430\u0440\u0430\u0430\u0434 \u0434\u0430\u043c\u0436\u0443\u0443\u043b\u0430\u0445 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0435\u0440\u04af\u04af\u0434 \u043d\u044c \u0431\u04af\u0440 \u0438\u0445\u0441\u044d\u044d\u0434 10, 20 \u0431\u043e\u043b\u043e\u043e\u0434 \u044f\u0432\u0447\u0438\u0445 \u043d\u044c \u0447 \u0431\u0438\u0439. \u0422\u044d\u0440 \u04af\u0435\u0434 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0441\u0442 \u0442\u0430 \u0445\u044d\u0434 \u0434\u044d\u0445 \u0434\u044d\u044d\u0440 \u043d\u044c \u044f\u043c\u0430\u0440 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0435\u0440 \u0434\u0430\u043c\u0436\u0443\u0443\u043b\u0436 \u0431\u0430\u0439\u0433\u0430\u0430\u0433\u0430\u0430 \u043c\u0430\u0440\u0442\u0430\u0436 \u0441\u0430\u043d\u0430\u0430\u0434 \u0438\u0440\u043d\u044d. \u042d\u043d\u044d \u04af\u0435\u0434 Builder pattern \u0436\u0438\u043d\u0445\u044d\u043d\u044d \u0442\u043e\u0445\u0438\u0440\u043d\u043e. \u042d\u043d\u044d \u043b \u0430\u0441\u0443\u0443\u0434\u043b\u044b\u0433 \u0448\u0438\u0439\u0434\u044d\u0445 \u0433\u044d\u0436 \u0443\u0433\u0430\u0430\u0441\u0430\u0430 Builder \u043f\u0430\u0442\u0442\u0435\u0440\u043d \u04af\u04af\u0441\u0441\u044d\u043d \u0431\u0438\u043b\u044d\u044d. \u041f\u0425\u0410 (\u041f\u0440\u043e\u0433\u0440\u0430\u043c \u0425\u0430\u043d\u0433\u0430\u043c\u0436\u0438\u0439\u043d \u0410\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440) \u0445\u0438\u0447\u044d\u044d\u043b \u0434\u044d\u044d\u0440 \u0441\u0443\u0443\u0441\u0430\u043d \u0445\u04af\u04af\u0445\u0434\u04af\u04af\u0434 \u0431\u04af\u0433\u0434 \u043c\u044d\u0434\u044d\u0436 \u0431\u0430\u0439\u0445 \u0451\u0441\u0442\u043e\u0439.<\/p>\n

public class Ger{
\n private int hana;
\n private int burees;
\n private boolean shallasan;
\n private boolean ereelsen;<\/p>\n

public static class Builder {
\n \/\/required
\n private final int hana;
\n \/\/optional
\n private int burees = false;
\n private boolean shallasan = false;
\n private boolean ereelsen = false;<\/p>\n

public Builder(int hana) {
\n this.hana = hana;
\n }<\/p>\n

public Builder burees(int value) {
\n burees = value;
\n return this;
\n }<\/p>\n

public Builder shallasan(boolean value) {
\n shallasan = value;
\n return this;
\n }<\/p>\n

public Builder ereelsen(boolean value) {
\n ereelsen = value;
\n return this;
\n }<\/p>\n

public Ger build() {
\n return new Ger(this);
\n }
\n }<\/p>\n

private Ger(Builder builder) {
\n hana = builder.hana;
\n burees = builder.burees;
\n shallasan = builder.shallasan;
\n ereelsen = builder.ereelsen;
\n }
\n}<\/p><\/blockquote>\n

\u0414\u044d\u044d\u0440\u0445 \u043a\u043e\u043d\u0441\u0442\u0440\u0443\u043a\u0442\u043e\u0440\u044b\u0433 \u0434\u0430\u0440\u0430\u0430\u0445 \u0431\u0430\u0439\u0434\u043b\u0430\u0430\u0440 \u0433\u0438\u043d\u0436\u0438\u043d \u0445\u044d\u043b\u0431\u044d\u0440\u044d\u044d\u0440 \u0434\u0443\u0443\u0434\u0430\u0445 \u0431\u043e\u043b\u043e\u043c\u0436\u0442\u043e\u0439. \u0423\u0447\u0438\u0440 \u043d\u044c setter \u043c\u0435\u0442\u043e\u0434 \u0431\u04af\u0440 builder \u043e\u0431\u044c\u0435\u043a\u0442\u044b\u0433 \u0431\u0443\u0446\u0430\u0430\u0445 \u0442\u0443\u043b.<\/p>\n

\nGer ger = new Ger.Builder(5).burees(2).shallasan(true).ereelsen(true).build();<\/strong>\n<\/p><\/blockquote>\n

Java Standard API \u0431\u043e\u043b\u043e\u0445 StringBuilder \u043a\u043b\u0430\u0441\u0441 \u0431\u0430 Effective Java, 2nd Edition by Josh Bloch<\/em> \u043d\u043e\u043c\u043e\u043e\u0441 \u0441\u0430\u043d\u0430\u0430 \u0430\u0432\u0430\u0432.<\/p>\n","protected":false},"excerpt":{"rendered":"

\u042d\u043d\u044d \u043d\u044d\u0440\u0438\u0439\u0433 \u0445\u0430\u0440\u0430\u0430\u0434 \u0437\u0430\u0440\u0438\u043c \u0445\u04af\u043c\u04af\u04af\u0441 \u043e\u0433\u0442 \u0441\u043e\u043d\u0441\u043e\u043e\u0433\u04af\u0439 \u0431\u0430\u0439\u0436 \u0431\u043e\u043b\u043d\u043e. \u041d\u044d\u0440\u0438\u0439\u0433 \u043d\u044c \u043c\u044d\u0434\u044d\u0445\u0433\u04af\u0439 \u0447 \u0431\u04af\u0445 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0438\u0441\u0442\u0443\u0443\u0434\u044b\u043d \u04e9\u0434\u04e9\u0440 \u0442\u0443\u0442\u0430\u043c\u0434\u0430\u0430 \u0445\u044d\u0440\u044d\u0433\u043b\u044d\u0434\u044d\u0433 \u043f\u0430\u0442\u0442\u0435\u0440\u043d. \u0414\u043e\u043e\u0440\u0445 \u043a\u043e\u0434\u044b\u0433 \u0445\u0430\u0440\u043d\u0430 \u0443\u0443. Ger(int hana) { … } Ger(int hana, int burees) { … } Ger(int hana, int burees, boolean shallasan) { … } Ger(int hana, int burees, boolean shallasan, […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[103],"tags":[112,111],"class_list":["post-649","post","type-post","status-publish","format-standard","hentry","category-103","tag-builder-pattern","tag-telescoping-constructor-pattern"],"_links":{"self":[{"href":"https:\/\/www.badral.net\/index.php?rest_route=\/wp\/v2\/posts\/649"}],"collection":[{"href":"https:\/\/www.badral.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.badral.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.badral.net\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.badral.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=649"}],"version-history":[{"count":8,"href":"https:\/\/www.badral.net\/index.php?rest_route=\/wp\/v2\/posts\/649\/revisions"}],"predecessor-version":[{"id":730,"href":"https:\/\/www.badral.net\/index.php?rest_route=\/wp\/v2\/posts\/649\/revisions\/730"}],"wp:attachment":[{"href":"https:\/\/www.badral.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=649"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.badral.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=649"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.badral.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=649"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}