XSLT:所有先前属性的总和 [英] XSLT: Sum of all previous attributes
问题描述
我在总结与每个元素相关的 arraySize 属性编号时遇到了一些麻烦.
I am having some troubling getting summing up the arraySize attribute numbers pertaining to each element.
XML 代码:
<head>
<element>
<message name="something">
<field arraySize="1"/>
<struct name="asdf">
<struct name="qwera">
<field arraySize="1"/>
<field arraySize="1"/>
</struct>
<struct name="xcv">
<field arraySize="3"/>
<field arraySize="1"/>
</struct>
<struct name="nnge">
<struct name="sdfssk">
<field arraySize="1"/>
<field arraySize="1"/>
</struct>
<struct name="fhjmn">
<field arraySize="2"/>
<field arraySize="1"/>
</struct>
<struct name="wetryk">
<field arraySize="1"/>
<field arraySize="1"/>
</struct>
</struct>
</struct>
<field arraySize="1"/>
</message>
</element>
<element>
... similar struct "tree"
</element>
<element>
... similar struct "tree"
</element>
</head>
XSLT 代码:这是我尝试解决问题的方式.
XSLT code: This is how I've tried to solve the problem.
<xsl:template match="p:struct">
<xsl:apply-templates>
<xsl:with-param name="previous" select="sum(preceding-sibling::*//@arraySize)"/>
</xsl:apply-templates>
</xsl:template>
<xsl:template match="p:field">
<xsl:param name="previous" select="0"/>
<xsl:value-of select="$previous + sum(preceding-sibling::*//@arraySize)"/>
</xsl:template>
预期输出:
element #1
1
2
3
6
7
8
9
11
12
13
14
15
element #2
1
2
... etc
实际输出:
1 <-- Problem #1
1
2
5
6
1 <--- Problem #2
2
4
5
6
7
15 <-- The correct summation is produced here.
我需要对所有前面的 arraySize 属性求和.它有点工作，但两个问题是: 1. 第一个字段没有求和.2. 求和在第三个缩进结构处重新开始(如果缩进是正确的术语).
I need to sum all of the preseding arraySize attributes. It works somewhat, but the two problems are: 1. the first field isn't summed. 2. The summation restarts at the third indented struct (if indented is the correct terminology).
有人可以帮我吗?
推荐答案
为此，我认为您应该使用 preceding:: 轴而不是 preceding-sibling:: 轴.
For this, I think you should be using the preceding:: axis and not the preceding-sibling:: axis.
像这样:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:p="aaa">
<xsl:output method="text" indent="yes"/>
<xsl:variable name="nl" select="'
'" />
<xsl:template match="text()" />
<xsl:template match="/*">
<xsl:apply-templates select="p:element" />
</xsl:template>
<xsl:template match="p:element">
<xsl:value-of select="concat('element #', position(), $nl)"/>
<xsl:apply-templates />
<xsl:value-of select="$nl"/>
</xsl:template>
<xsl:template match="p:field">
<xsl:variable name="elId" select="generate-id(ancestor::p:element)" />
<xsl:variable name="preds"
select="preceding::*/@arraySize[generate-id(ancestor::p:element) =
$elId]" />
<xsl:value-of select="concat(@arraySize + sum($preds), $nl)"/>
</xsl:template>
</xsl:stylesheet>
产生输出:
element #1
1
2
3
6
7
8
9
11
12
13
14
15
element #2
1
2
3
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