将动态字符串评估为 XPath 表达式? [英] Evaluate dynamic string as an XPath expression?
问题描述
目前，我正在写一些东西来做 XSLT2 函数的单元测试，想法很简单:
Currently, I'm writing something to do Unit testing for XSLT2 functions, the idea is very simple:
- 创建一个
custom-library.xsl，其中包含一些自定义 XSLT2 函数. 创建包含测试用例的数据XML，如下XML Schema xslunit.xsd:
- Create a
custom-library.xsl, which contains some custom XSLT2 functions. Create a data XML contains the test cases, as following XML Schema xslunit.xsd:
模式结构 http://xml.bodz.net/schema/xslunit/xslunit.png
通过转换运行测试用例，使用 xslunit-xslt2.xsl，并得到测试结果html.
Run the test cases by transform it, using xslunit-xslt2.xsl, and get the test result html.
现在，问题是，测试用例中有函数调用，我必须在 XSLT 中对其进行评估(文件 xslunit-xslt2.xsl).但我找不到评估 XPath 的方法.
Now, the question is, there is function-call in the test cases, and I have to evaluate it in the XSLT (file xslunit-xslt2.xsl). But I can't find a way to evaluate an XPath.
虽然，使用某种Java扩展可能很容易，但我真的不想再带来麻烦.我希望一切都只能在 XSLT2 中使用.
Though, it may be easy to using some kind of Java extensions, but I really don't want to bring in another trouble. I hope everything can just work with-in XSLT2 only.
推荐答案
不，纯 XSLT 2.0 不支持对 XML 数据中的 XPath 表达式求值.Saxon 9(在其商业版本中)有一个扩展功能:http://www.saxonica.com/documentation/extensions/functions/evaluate.xml.AltovaXML Tools 有一个类似的:http://manual.altova.com/AltovaXML/altovaxmlcommunity/index.html?xextaltova_general.htm
No, pure XSLT 2.0 does not have support do evaluate an XPath expression found in your XML data. Saxon 9 (in its commercial editions) however has an extension function: http://www.saxonica.com/documentation/extensions/functions/evaluate.xml. And AltovaXML Tools has a similar one: http://manual.altova.com/AltovaXML/altovaxmlcommunity/index.html?xextaltova_general.htm
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