Groovy XmlSlurper用给定的子节点值替换节点 [英] Groovy XmlSlurper replace node with given child node value

问题描述

对于以下问题，我将不胜感激. (我是Groovy的新手，我找不到解决我问题的任何具体示例.)

I'd be grateful for help with the following problem. (I am new to Groovy, and I can't find any specific examples addressing my issue).

使用XmlSlurper我正在尝试替换具有特定值的子级的XML节点.例如，我要转换:

Using XmlSlurper I am trying to replace an XML node which has a child with a certain value. For example, I want to transform:

<assets>
    <!--zero to many asset nodes beforehand-->
    <asset>
        <name>MyPackageName</name>
        <data>
            <stringValue>my string value</stringValue>
        </data>
    </asset>
    <!--zero to many asset nodes afterwards-->
</assets>

进入:

<assets>
    <!--zero to many asset nodes beforehand-->
    <asset>
        <name>MyPackageName</name>
        <data/>
    </asset>
    <!--zero to many asset nodes afterwards-->
</assets>

我找不到任何可以找到名称为MyPackageName的资产的代码示例.

I can't find any examples of code which navigate to find my asset with the name MyPackageName.

我失败的尝试是:

    def assets = new XmlSlurper().parseText(deviceXml)
    assets.asset[name.text()=="MyPackageName"].replaceNode{
        asset{
            name("MyPackageName")
            data()
        }
    }

对于缺少资产"的属性，我得到一个groovy.lang.MissingPropertyException异常，因此很明显我查找节点的语法是错误的.

I get a groovy.lang.MissingPropertyException exception for a missing property for "asset" so clearly my syntax to find my node is wrong.

推荐答案

以下示例完成了该工作:

The following example does the job:

import groovy.xml.XmlUtil
import groovy.xml.StreamingMarkupBuilder

def input = '''<assets>
    <!--zero to many asset nodes beforehand-->
    <asset>
        <name>MyPackageName</name>
        <data>
            <stringValue>my string value</stringValue>
        </data>
    </asset>
    <!--zero to many asset nodes afterwards-->
</assets>'''

def xml = new XmlSlurper().parseText(input)

xml.asset.data.replaceNode {}

println XmlUtil.serialize(new StreamingMarkupBuilder().bind {
  mkp.yield xml
} )

第二种更新方式:

import groovy.xml.XmlUtil
import groovy.xml.StreamingMarkupBuilder

def input = '''<assets>
    <!--zero to many asset nodes beforehand-->
    <asset>
        <name>MyPackageName</name>
        <data>
            <stringValue>my string value</stringValue>
        </data>
    </asset>
    <!--zero to many asset nodes afterwards-->
</assets>'''

def assets = new XmlSlurper().parseText(input)
assets.asset.replaceNode {
    asset {
        name("MyPackageName")
        data()
    }
}

println XmlUtil.serialize(new StreamingMarkupBuilder().bind {
  mkp.yield assets
} )

在寻找特定节点时:

import groovy.xml.XmlUtil
import groovy.xml.StreamingMarkupBuilder

def input = '''<assets>
    <!--zero to many asset nodes beforehand-->
    <asset>
        <name>MyPackageName</name>
        <data>
            <stringValue>my string value</stringValue>
        </data>
    </asset>
    <!--zero to many asset nodes afterwards-->
</assets>'''

def assets = new XmlSlurper().parseText(input)
assets.asset.find {it.name.text() == 'MyPackageName' }. replaceNode {
    asset {
        name("MyPackageName")
        data()
    }
}

println XmlUtil.serialize(new StreamingMarkupBuilder().bind {
  mkp.yield assets
} )

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