JAXB解析带有变量的XML文件（例如$（var1））

Question

I'm interested to parse an XML that contains variables (which are defined by me inside the XML).

Here's an example of the XML files:

   <parameters>
          <parameter name="parent-id" value="1" />
          <parameter name="child-id" value="1" />
   </parameters>

   <Parents>
          <Parent id="$(parent-id)">
                 <Children>
                       <Child id="$(child-id)">
                       </Child>
                 </Children>
          </Parent>
   </Parents>

Is there a utility or some standard way to do so in Java? (using JAXB possibly) Or should I implement this "mini" parsing mechanism by myself? (A mechanism that identifies the variables and plants them inside the XML, and only later calls JAXB flows)

Thanks a lot in advance!

Answer 1

Use an XSLT transformation to convert your XML into an XSLT stylesheet and then execute the XSLT stylesheet. It's simple enough to convert

 <parameters>
          <parameter name="parent-id" value="1" />
          <parameter name="child-id" value="1" />
   </parameters>

into

  <xsl:param name="parent-id" select="1" />
  <xsl:param name="child-id" select="1" />

and

<Parent id="$(parent-id)">

into

<Parent id="{$parent-id}">

and to add a wrapper xsl:stylesheet and xsl:template element, and then you're done.