如何获取groovy模板上使用的变量列表 [英] How to get the list of variables used on a groovy template

问题描述

例如考虑模板：

我想获取模板中需要的变量列表。

 您好$ {firstName} $ {姓氏} 
  

我想获得列表 ['firstName'，'surname']

在开始解析字符串之前我自己想知道groovy是否为我准备好了一些东西？解析方案

它们似乎在运行时不再可用。

我编译了以下类：

  class Gstr {
 $ b $ def a = 10 
 def c = 20 
 def b =值为$ {a} with $ {c}
 println （b.class）
 println（b.values）
 println（b.strings）
} 
} 
  

使用jd-gui进行反编译时，会出现以下内容：

  Object a = Integer.valueOf（10）; 
 Object c = Integer.valueOf（20）; 
 Object b = new GStringImpl（
 new Object [] {a，c}，new String [] {value is，with，}）; 
 arrayOfCallSite [0] .callStatic（
 Gstr.class，arrayOfCallSite [1] .callGetProperty（b））; 
 arrayOfCallSite [2] .callStatic（
 Gstr.class，arrayOfCallSite [3] .callGetProperty（b））; 
 arrayOfCallSite [4] .callStatic（
 Gstr.class，arrayOfCallSite [5] .callGetProperty（b））; 
  

它们似乎在编译时被引用绑定。

I would like to get the list of variables needed in a template.

for example consider the template:

Hello ${firstName} ${surname}

I would like to get the list ['firstName', 'surname']

Before starting to parse the string myself I was wondering if groovy has something ready for me?

解决方案

They don't seem to be available at runtime anymore.

I compiled the following class:

class Gstr {
  static main(args) {
    def a = 10
    def c = 20
    def b = "the value is ${a} with ${c}"
    println( b.class )
    println (b.values)
    println (b.strings)
  }
}

Upon decompilation with jd-gui, the following comes out:

Object a = Integer.valueOf(10);
Object c = Integer.valueOf(20);
Object b = new GStringImpl(
    new Object[] { a, c }, new String[] { "the value is ", " with ", "" });
arrayOfCallSite[0].callStatic(
    Gstr.class, arrayOfCallSite[1].callGetProperty(b));
arrayOfCallSite[2].callStatic(
    Gstr.class, arrayOfCallSite[3].callGetProperty(b));
arrayOfCallSite[4].callStatic(
    Gstr.class, arrayOfCallSite[5].callGetProperty(b));

They seem to be binded by reference in compilation.

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