XSLT 2.0 基于属性值的组相邻 [英] XSLT 2.0 group-adjacent based on attribute value

问题描述

我正在尝试使用 XSLT 生成 XML，我想在两个连续节点的属性值为 Position=A"时生成一个字符串，我想在字符串中添加一个连字符(-)，否则我想要连接节点值.我尝试使用具有属性值的组相邻，但它在空属性节点上失败.我尝试为属性值添加 string()，但没有奏效.

I am trying to generate XML using XSLT, I want to generate a string when two consecutive nodes has an attribute value as Position="A", I want to add a hyphen(-) in the string, otherwise I want to concatenate node value. I tried using group-adjacent with attribute value, but it fails on empty attribute node. I tried adding string() for attribute value, but not worked.

<xsl:variable name="columnId">
  <xsl:for-each-group select="CabinLayout/Columns" group-adjacent="string(@Position)">
    <xsl:value-of select="current-group()"/>
  </xsl:for-each-group>
</xsl:variable>
<ColumnID><xsl:value-of select="translate($columnId,' ','-')"/></ColumnID>

以下是示例输入和所需的输出

Below is the sample input and desired output

<CabinLayout>
  <Columns Position="W">A</Columns>
  <Columns>B</Columns>
  <Columns Position="A">C</Columns>
  <Columns Position="A">D</Columns>
  <Columns>E</Columns>
  <Columns Position="W">F</Columns>
</CabinLayout>

输出- ABC-DEF

Output- ABC-DEF

<CabinLayout>
  <Columns Position="W">A</Columns>
  <Columns>B</Columns>
  <Columns>C</Columns>
  <Columns Position="A">D</Columns>
  <Columns>E</Columns>
  <Columns>F</Columns>
  <Columns>G</Columns>
  <Columns>H</Columns>
  <Columns>J</Columns>
  <Columns Position="W">K</Columns>
</CabinLayout>

输出:ABCDEFGHJK

Output : ABCDEFGHJK

<CabinLayout>
  <Columns Position="W">A</Columns>
  <Columns>B</Columns>
  <Columns Position="A">C</Columns>
  <Columns Position="A">D</Columns>
  <Columns>E</Columns>
  <Columns>F</Columns>
  <Columns Position="A">G</Columns>
  <Columns Position="A">H</Columns>
  <Columns>J</Columns>
  <Columns Position="W">K</Columns> 
</CabinLayout>

输出:ABC-DEFG-HJK

Output : ABC-DEFG-HJK

推荐答案

我会使用 current-grouping-key() 并且如果它是 A 然后使值分隔符-，否则获取以空字符串为分隔符的值:

I would use the current-grouping-key() and if it is A then make the value separator -, otherwise get the values with an empty string as the separator:

<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:wd="urn:com.test/bsvc" exclude-result-prefixes="wd">
    <xsl:output method="xml" indent="yes" omit-xml-declaration="yes"/>
    
    <xsl:template match="/"> 
        <xsl:variable name="columnId">
            <xsl:for-each-group select="CabinLayout/Columns" group-adjacent="string(@Position)">
                <xsl:choose>
                    <xsl:when test="current-grouping-key()='A'">
                        <xsl:value-of select="current-group()" separator="-"/>
                    </xsl:when>
                    <xsl:otherwise><xsl:value-of select="current-group()" separator=""/></xsl:otherwise>
                </xsl:choose>
            </xsl:for-each-group>
        </xsl:variable>
        <ColumnID><xsl:value-of select="$columnId"/></ColumnID>
    </xsl:template>
    
</xsl:stylesheet>

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