Groovy：如何只更新xml中的某些标签数据？

Question

我有这样的xml结构：

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<service>
    <Income>
        <localTaxes>
            <details>
                <start>2017-09-07</start>
                <startDate>2017-02-02</startDate>
                <endDate>2017-03-02</endDate>
                <runAs>false</runAs>
                <makeVersion>1</makeVersion>
                <patch>this is  patch</patch>
                <parameter>1</parameter>
            </details>
        </localTaxes>
        <TaxyFree>
            <details>
                <start>2017-09-07</start>
                <startDate>2017-02-02</startDate>
                <endDate>2017-03-02</endDate>
                <runAs>false</runAs>
                <makeVersion>1</makeVersion>
                <patch>this is  patch</patch>
                <parameter>1</parameter>
            </details>
        </TaxyFree>
    </rs>
</Income>

在我的groovy代码中，我想只更新localTaxes并保持其他数据不变，现在我有如下代码，但结果我只能更新localTaxes，除此之外没有任何数据（我的意思是我只有＆lt; service><Income><locaTaxes>...</localTaxes></Income></service> localTaxes标记及其相关数据，我应该如何更改我的代码才能更新locaTaxes并使xml的其他部分成为不可变的？： < / p>

def root = new XmlSlurper().parseText(content);
            def listOfMaps = root.rs.borderCross.details.collect { node -> [
                    start: node.start.text(),
                    startDate: node.startDate.text(),
                    endDate: node.endDate.text(),
                    patch:node.patch.text(),
                    runAs:node.runAs.text(),
                    makeVersion:node.makeVersion.text(),
                    parameter:node.parameter.text()

            ]
            }  def process = { binding, element, name ->
                if( element[ name ] instanceof Collection ) {
                    element[ name ].each { n ->
                        binding."$name"( n )
                    }
                }
                else if( element[ name ] ) {
                    binding."$name"( element[ name ] )
                }
            }


            material= XmlUtil.serialize( new StreamingMarkupBuilder().with { builder ->
                builder.bind { binding ->
                    service{
                        rs {
                            listOfMaps.each { e ->
                                borderCross {
                                    process(binding, e, 'start')
                                    process(binding, e, 'startDate')
                                    process(binding, e, 'endDate')
                                    process(binding, e, 'runAs')
                                    process(binding, e, 'makeVersion')
                                    process(binding, e, 'parameter')
                                }


                            }

                        }
                    }
                }
            } )