如何在使用XmlSlurper进行分析时使用带有点的配置项 [英] How Can I Use Config Entries with Dots When Parsing with XmlSlurper

问题描述

这里是Config文件：

  sample {
 xml {
 frompath =Email.From
} 
} 
  

这里是XML

  < XML> 
<电子邮件> 
<来自> 
<地址> [e-mail]< /地址> 
< Alias> Foo Bar< / Alias> 
< / From> 
<电子邮件> 
< / xml> 
  

这是我最初试过的：

<$ （新文件（myfile.xml））。text）
（$ myfile.xml））


def record = slurper.parseText
def emailFrom = record？。$ {grailsApplication.config.sample.xml.frompath}。Address.text（）


这不起作用，因为XmlSlurper允许在路径名中使用特殊字符，只要它们被引号括起来，所以应用程序正在将其翻译为：

  def emailFrom = record？。Email.From.Address.text（）
  

而不是



  def emailFrom = record？.Email.From.Address .text（）
  

我试着将frompath属性设置为Email 。从然后'Email。From'。我尝试在解析语句中间标记属性（不要问）。

有人可以请我指点一些资源，以了解我/我可以如何做这个？

我觉得这样问题在Grails taglib中获得动态配置参数并且这个 https://softnoise.wordpress.com/2013/07/29/grails-injecting-config-parameters/ 可能会有一个解决方案的低语，但我需要新鲜的眼睛才能看到它。

解决方案

是减少这种路径的正确方法。例如

  def emailFrom ='Email.From'.tokenize（'。'）。inject（record）{r，it  - > r。$ it} 
 def emailFromAddress = emailFrom.Address.text（）
  

如果你的路径可能变得复杂，而且你可能会采用更危险的方式，那么你也可以使用 Eval 。例如

  def path =a [0] .bc
 def map = [a：[[b： [c：666]]]] //虚拟地图，与xmlslurper相同
 assert Eval.x（map，x。$ path）== 666 
  

I'm trying to use a groovy Config entry to parse an xml file with XmlSlurper.

Here's the Config file:

sample {
    xml {
        frompath = "Email.From"
    }
}

Here's the XML

<xml>
    <Email>
        <From>
            <Address>[e-mail]</Address>
            <Alias>Foo Bar</Alias>
        </From>
    <Email>
</xml>

This is what I tried initially:

XmlSlurper slurper = new XmlSlurper()

def record = slurper.parseText((new File("myfile.xml")).text)

def emailFrom = record?."${grailsApplication.config.sample.xml.frompath}".Address.text()

This doesn't work because XmlSlurper allows one to use special characters in path names as long as they're surrounded by quotes, so the app is translating this as:

def emailFrom = record?."Email.From".Address.text()

and not

def emailFrom = record?.Email.From.Address.text()

I tried setting the frompath property to be "Email"."From" and then '"Email"."From"'. I tried tokenizing the property in the middle of the parse statement (don't ask.)

Can someone please point me towards some resources to find out if/how I can do this?

I feel like this issue getting dynamic Config parameter in Grails taglib and this https://softnoise.wordpress.com/2013/07/29/grails-injecting-config-parameters/ may have whispers of a solution, but I need fresh eyes to see it.

解决方案

The solution in issue getting dynamic Config parameter in Grails taglib is a proper way to deref down such a path. E.g.

def emailFrom = 'Email.From'.tokenize('.').inject(record){ r,it -> r."$it" }
def emailFromAddress = emailFrom.Address.text()

If your path there can get complex and you rather go with the potentially more dangerous way, you could also use Eval. E.g.

def path = "a[0].b.c"
def map = [a:[[b:[c:666]]]] // dummy map, same as xmlslurper
assert Eval.x(map, "x.$path") == 666

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