如何在Clojure中实现Java接口 [英] How do I implement a Java interface in Clojure

问题描述

如何创建一个Clojure对象实现这个接口，然后从Java代码调用

  public interface Doer { 
 public String doSomethin（String input）; 
} 
 
 Doer clojureDoer =？ 
 
 String output = clojureDoer.doSomethin（input）; 
  

解决方案

reify 强烈推荐用于实现接口 - proxy 是重型，旧和慢，所以应该尽可能避免。实现如下：

 （reify Doer 
（doSomethin [this input] 
 .whatever ...）））
  

注意，现有的使用 proxy 语法不正确，如果你决定使用代理：proxy接受隐式这个参数，而不是命名的第一个参数。 / p>

How do I create a Clojure object that implements this interface and then gets called from Java code?

public interface Doer {
   public String doSomethin(String input);
}

Doer clojureDoer = ?;

String output = clojureDoer.doSomethin(input);

解决方案

reify is strongly preferred for implementing interfaces - proxy is heavy-duty, old, and slow, so should be avoided when possible. An implementation would look like:

(reify Doer
  (doSomethin [this input]
    (...whatever...)))

Note that the existing answer about using proxy has incorrect syntax, if you decide to go with a proxy after all: proxy takes an implicit this argument, not a named first argument.

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