在使用regex解析字符串后创建并返回Nodelist

Question

I am attempting to make a java function to use in my stylesheet that will split a string based on a regex character and return a NodeList.

For example, I would like my stylesheet to be something like:

<?xml version="1.0"?>
<xsl:stylesheet
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:xalan="http://xml.apache.org/xalan"
    version="1.0">
    <xsl:template match="/">
        <Root>
            <xsl:copy-of select="re:splitRegex('This  is  my      string', '\s\s+')"/>
        </Root>
    </xsl:template>
</xsl:stylesheet>

And I want my resulting XML to look like this:

<?xml version="1.0" encoding="UTF-8"?>
<Root xmlns:stash="xalan://com.nxtech.util.io.Stash">
    <token>This</token>
    <token>is</token>
    <token>my</token>
    <token>string</token>
</Root>

I have this function in my java code that returns an array of strings:

public static String[] split(String toSplit,String regex) {
    return toSplit.split(regex);
}

But I need something that returns a NodeList , or whatever will format my XML file correctly.

Answer 1

I agree with Martin, that it is better to do it in XSLT 2.0 .

But if you prefer the Xalan / Java approach, then:

Solution #1

Change your Java function, so that it returns concatenated tokens, "enveloped" between token tags (opening and closing).

`<token>...</token>`

(plus \\n after each </token> ).

The returned content should be written out between opening and closing Root tags.

Solution #2

If you for some other reason need a node-set , you can do it as follows:

In the stylesheet tag include:

xmlns:exsl="http://exslt.org/common"
extension-element-prefixes="exsl"

Your splitting function should return one concatenated string (as above).

Then, in the proper place write:

<xsl:variable name="wrk">
  <xsl:value-of select="re:splitRegex('This  is  my      string', '\s\s+')"/>
</xsl:variable>
<xsl:variable name="tokens" select="exsl:node-set($wrk)"/>

The node-set function changes a Result Tree Fragment into a "proper" node-set which you can use eg in XPaths or in any other way.