Groovy 方法缺失

发布于 2024-09-16 07:43:13 字数 700 浏览 5 评论 0原文

我在对象 Foo 内有一个闭包，在闭包内我定义了一个名为“myStaticMethod”的方法，一旦在对象外部调用闭包，我想解析该方法 Foo。。我还碰巧在我的对象 Foo 中“故意”有一个同名的静态方法。当我调用闭包时，我将“解析策略”设置为 DELEGATE_ONLY 以拦截对闭包中定义的 myStaticMethod 的调用。

我试图通过 missingMethod 来实现这一点，但该方法从未被拦截。当我将 Foo.myStaticMethod 设置为非静态时，该方法将被拦截。尽管我的解析策略设置为 DELEGATE_ONLY，但我不太明白为什么会发生这种情况。 Foo.myStaticMethod 是否静态应该不重要，否则我会丢失一些东西

class Foo {
   static myclosure = {
       myStaticMethod()
   }

   static def myStaticMethod() {}
}


class FooTest {
  def c = Foo.myclosure
  c.resolveStrategy = Closure.DELEGATE_ONLY
  c.call()

  def missingMethod(String name, def args) {
    println $name
  }
}

原文

I have a closure within an object Foo and inside the closure i define a method called 'myStaticMethod' that I want to resolve once the closure is called outside the object Foo. I also happen to have 'on purpose' a static method within my object Foo with the same name. When I call the closure i set the 'resolve strategy' to DELEGATE_ONLY to intercept the call to myStaticMethod that is defined within the closure.

I tried to achieve that through missingMethod but the method is never intercepted. When i make the Foo.myStaticMethod non static, the method is intercepted. I don't quite understand why this is happening though my resolve strategy is set to DELEGATE_ONLY. having the Foo.myStaticMethod static or not shouldn't matter or I am missing something

class Foo {
   static myclosure = {
       myStaticMethod()
   }

   static def myStaticMethod() {}
}


class FooTest {
  def c = Foo.myclosure
  c.resolveStrategy = Closure.DELEGATE_ONLY
  c.call()

  def missingMethod(String name, def args) {
    println $name
  }
}

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裸钻 2024-09-23 07:43:13

为了解决这个问题，我最终在调用 FooTests 中的闭包之前重写了 invokeMethod。

Foo.metaClass.'static'.invokeMethod = { String name, args ->
     println "Static Builder processing $name "
}

在尝试解决这个问题时，我发现了一种非常奇怪的方法来拦截丢失的静态方法。将来可能对你们中的一些人有用。

 static $static_methodMissing(String name, args) {
    println "Missing static $name"
}

-肯

To solve the problem, I ended up overriding the invokeMethod right before calling the closure in FooTests

Foo.metaClass.'static'.invokeMethod = { String name, args ->
     println "Static Builder processing $name "
}

While trying to solve this problem, i discovered a very weird way to intercept missing static methods. Might be useful to some of you in the future.

 static $static_methodMissing(String name, args) {
    println "Missing static $name"
}

-Ken

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梦途 2024-09-23 07:43:13

不幸的是，静态方法不会被闭包属性解析拦截。我知道拦截这些的唯一方法是重写拥有闭包的类上的静态元类invokeMethod，例如：

class Foo {
   static myclosure = {
       myStaticMethod()
   }

    static myStaticMethod() {
       return false
   }
}

Foo.metaClass.'static'.invokeMethod = { String name, args ->
    println "in static invokeMethod for $name"
    return true
}

def closure = Foo.myclosure
assert true == closure()

Static methods unfortunately aren't intercepted by the closure property resolution. The only way that I know to intercept those is to override the static metaClass invokeMethod on the class that owns the closure, ex:

class Foo {
   static myclosure = {
       myStaticMethod()
   }

    static myStaticMethod() {
       return false
   }
}

Foo.metaClass.'static'.invokeMethod = { String name, args ->
    println "in static invokeMethod for $name"
    return true
}

def closure = Foo.myclosure
assert true == closure()

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