XSLT - 追加兄弟

Question

我試圖使用XSLT將context-param作爲最後一個兄弟。沒有共同的父元素，所以任務有點困難。

我想追加以下元素：

<context-param> 
    <param-name>miku</param-name> 
    <param-value>kawaii</param-value> 
</context-param> 

作爲最後context-param元素以下（例如，所有context-param元素必須是彼此相鄰，它們不能在任何地方散落XML） 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> 

結果應該是這樣的：

<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> 

我該怎麼做？

Answer 1

這種轉變：

<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> 

當應用於提供的XML文檔：

<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> 

產生想要的，正確的結果：

<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> 

說明：

1. 身份規則副本的每個節點 「原樣」。

2. 有一個模板，覆蓋身份模板。此模板與所有父母孩子的context-param元素中的最後一個context-param元素匹配。

3. 在重寫模板中執行兩個動作;通過對身份規則的調用複製當前節點;然後將要附加的元素複製到輸出中。爲了方便和靈活性，我們假設要附加的元素作爲參數傳遞給變換。