XSLT - 追加兄弟 [英] XSLT - append sibling
问题描述
我正在尝试使用 XSLT 将 context-param
附加为最后一个兄弟.没有共同的父元素,所以任务有点难.
I'm trying to use XSLT to append context-param
as last sibling. There's no common parent element so the task is a little bit harder.
我想附加以下元素:
<context-param>
<param-name>miku</param-name>
<param-value>kawaii</param-value>
</context-param>
作为最后一个 context-param
元素(例如,所有 context-param
元素必须彼此相邻,它们不能分散在 xml 中的任何位置)中以下xml:
as the last context-param
element (eg. all context-param
elements must be next to each other, they can't be scattered anywhere in xml) in following xml:
<web-app>
<not_interesting_element1/>
<not_interesting_element2/>
<context-param>
<param-name>not_interesting_param_key1</param-name>
<param-value>kawaii</param-value>
</context-param>
<context-param>
<param-name>not_interesting_param_key2</param-name>
<param-value>kawaii</param-value>
</context-param>
<context-param>
<param-name>parameterThatsGuaranteedToBeHere</param-name>
<param-value>someValue</param-value>
</context-param>
<not_interesting_element3/>
<not_interesting_element4/>
<!-- ... servlets, ... -->
</web-app>
结果应该是这样的:
<web-app>
<not_interesting_element1/>
<not_interesting_element2/>
<context-param>
<param-name>not_interesting_param_key1</param-name>
<param-value>kawaii</param-value>
</context-param>
<context-param>
<param-name>not_interesting_param_key2</param-name>
<param-value>kawaii</param-value>
</context-param>
<context-param>
<param-name>parameterThatsGuaranteedToBeHere</param-name>
<param-value>someValue</param-value>
</context-param>
<context-param>
<param-name>miku</param-name>
<param-value>kawaii</param-value>
</context-param>
<not_interesting_element3/>
<not_interesting_element4/>
<!-- ... servlets, ... -->
</web-app>
请问我该怎么做?
推荐答案
这种转变:
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output omit-xml-declaration="yes" indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:param name="pElemToAdd">
<context-param>
<param-name>miku</param-name>
<param-value>kawaii</param-value>
</context-param>
</xsl:param>
<xsl:template match="node()|@*" name="identity">
<xsl:copy>
<xsl:apply-templates select="node()|@*"/>
</xsl:copy>
</xsl:template>
<xsl:template match="context-param[last()]">
<xsl:call-template name="identity"/>
<xsl:copy-of select="$pElemToAdd"/>
</xsl:template>
</xsl:stylesheet>
应用于提供的 XML 文档时:
<web-app>
<not_interesting_element1/>
<not_interesting_element2/>
<context-param>
<param-name>not_interesting_param_key1</param-name>
<param-value>kawaii</param-value>
</context-param>
<context-param>
<param-name>not_interesting_param_key2</param-name>
<param-value>kawaii</param-value>
</context-param>
<context-param>
<param-name>parameterThatsGuaranteedToBeHere</param-name>
<param-value>someValue</param-value>
</context-param>
<not_interesting_element3/>
<not_interesting_element4/>
<!-- ... servlets, ... -->
</web-app>
产生想要的、正确的结果:
<web-app>
<not_interesting_element1/>
<not_interesting_element2/>
<context-param>
<param-name>not_interesting_param_key1</param-name>
<param-value>kawaii</param-value>
</context-param>
<context-param>
<param-name>not_interesting_param_key2</param-name>
<param-value>kawaii</param-value>
</context-param>
<context-param>
<param-name>parameterThatsGuaranteedToBeHere</param-name>
<param-value>someValue</param-value>
</context-param>
<context-param>
<param-name>miku</param-name>
<param-value>kawaii</param-value>
</context-param>
<not_interesting_element3/>
<not_interesting_element4/><!-- ... servlets, ... -->
</web-app>
说明:
身份规则按原样"复制每个节点.
The identity rule copies every node "as-is".
有一个模板,覆盖了身份模板.此模板匹配作为其父元素的所有子元素的所有 context-param
元素的最后一个 context-param
元素.
There is a single template, overriding the identity template. This template matches the last context-param
element of all context-param
elements that are children of their parent.
在覆盖模板中执行两个操作;通过调用身份规则复制当前节点;然后将要附加的元素复制到输出中.为了方便和灵活,我们假设要附加的元素作为参数传递给转换.
In the overriding template two actions are performed; the current node is copied by a call to the identity rule; then the element to be appended is copied to the output. For convenience and flexibility, we assume that the element to be appended is passed as a parameter to the transformation.
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