查找值的 XSLT3 问题 |串流

Question

我有一个合并的报告数据（数据来自两个来源）作为输入文件，我需要根据键查找值。目前我的代码返回错误地查找值。由于输入数据的大小预计会很大，我想使用流式处理以获得更好的性能。

这是我的输入 xml

元素Number'是查找的关键。 Xpath is 'Batch/Workers/Number`
根据Number' . Xpath isMergedOutput/Data/Row/Phone`

Phone

样本输入

<?xml version="1.0" encoding="UTF-8"?> 
<MergedOutput>
    <Data>
        <Row>
            <Employee_Batch_Id>12567</Employee_Batch_Id>
            <Phone>FirstEmp8013457896</Phone>
            <Assignment_Id>5046150263</Assignment_Id>
        </Row>
        <Row>
            <Employee_Batch_Id>12568</Employee_Batch_Id>
            <Phone>SecondEmp7853457896</Phone>
            <Assignment_Id>5046150263</Assignment_Id>
        </Row>
    </Data>
    <Batch>
        <Workers>
            <Number>12567</Number>
            <Contact>Work7864532890</Contact>
        </Workers>
        <Workers>
            <Number>12568</Number>
            <Contact>Work6782340167</Contact>
        </Workers>
    </Batch>
</MergedOutput>

当前的 XSLT3 代码

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
    xmlns:map="http://www.w3.org/2005/xpath-functions/map"          
    exclude-result-prefixes="xs r1 r2 map"
    version="3.0">

    <xsl:output method="xml" indent="yes"/>

    <xsl:mode streamable="yes" on-no-match="shallow-skip" use-accumulators="#all"/>

    <xsl:accumulator name="FirstReportLookupValuePhone" as="xs:string" initial-value="''" streamable="yes">
        <xsl:accumulator-rule match="Phone/text()" select="."/>
    </xsl:accumulator>

    <xsl:accumulator name="EmployeeIDLookup" as="map(xs:string,xs:string)" initial-value="map{}" streamable="yes">
        <xsl:accumulator-rule match="Employee_Batch_Id/text()" select="map:put($value, string(.), accumulator-before('FirstReportLookupValuePhone'))"/>
    </xsl:accumulator>    
        <xsl:template match="Batch">
            <Workers>
            <xsl:apply-templates select="Workers"/>
            </Workers>
        </xsl:template>

    <xsl:template match="Workers">
        <xsl:variable name="vWorkers" select="copy-of()"/>
        <xsl:variable name="vMappedWorker" select="accumulator-after('EmployeeIDLookup')( normalize-space($vWorkers/Number))"/>
        <Worker>
        <WorkerID><xsl:value-of select="$vWorkers/Number"/></WorkerID>
        <Work_Contact_Number><xsl:value-of select="$vWorkers/Contact"/></Work_Contact_Number>
        <Home_Contact_Number><xsl:value-of select="$vMappedWorker"/></Home_Contact_Number>
        </Worker>

    </xsl:template>


</xsl:stylesheet>

当前输出

<?xml version="1.0" encoding="UTF-8"?>
<Workers>
    <Worker>
        <WorkerID>12567</WorkerID>
        <Work_Contact_Number>Work7864532890</Work_Contact_Number>
        <Home_Contact_Number/> <!-- Value is empty, Expected value is FirstEmp8013457896 -->
    </Worker>
    <Worker>
        <WorkerID>12568</WorkerID>
        <Work_Contact_Number>Work6782340167</Work_Contact_Number>
        <Home_Contact_Number>FirstEmp8013457896</Home_Contact_Number> <!-- Incorrect Value, Expected value is SecondEmp7853457896 -->
    </Worker>
</Workers>

预期输出

<?xml version="1.0" encoding="UTF-8"?>
<Workers>
   <Worker>
      <WorkerID>12567</WorkerID>
      <Work_Contact_Number>Work7864532890</Work_Contact_Number>
      <Home_Contact_Number>FirstEmp8013457896</Home_Contact_Number>
   </Worker>
   <Worker>
      <WorkerID>12568</WorkerID>
      <Work_Contact_Number>Work6782340167</Work_Contact_Number>
      <Home_Contact_Number>SecondEmp7853457896</Home_Contact_Number>
   </Worker>
</Workers>

有人能帮我弄清楚我怎样才能得到想要的输出吗？

Answer 1

问题是匹配 Employee_Batch_ID 的累加器试图使用 Phone 的累加器值；但是因为 Employee_Batch_ID 出现在 Phone 元素之前，所以 Phone 累加器值尚不可用。

我觉得你得反逻辑：遇到Employee_Batch_ID/text()，把ID值作为字符串保存在累加器A中；当您遇到 Phone/text() 时，将 ID=phone 条目添加到 Accumulator B.

中保存的地图中

查找值的 XSLT3 问题 |串流

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