That still doesn't seem to address the question about adding an attribute. If
the attribute doesn't exist, you can't access it with something like
domCtx.getPointer("root/child/@id"), right? I took a look at the API and this
seemed to work (JSTL 1.1, Xalan 2.6.0, and Xerces 2.6.2 on TC 5.0.19):<%@ page contentType="text/plain" %> <%@ page import="org.apache.commons.jxpath.*" %> <%@ page import="org.w3c.dom.*" %> <%@ taglib prefix="x" uri="http://java.sun.com/jsp/jstl/xml"; %> <x:parse varDom="dom"> <root> <child>Child 1</child> <child>Child 2</child> <child>Child 3</child> </root> </x:parse> child: <x:out select="$dom/root/child"/> child id: <x:out select="$dom/root/child/@id"/> <jsp:useBean id="dom" type="org.w3c.dom.Document"/> <% JXPathContext domCtx = JXPathContext.newContext(dom); Pointer ptr = domCtx.getPointer("root/child"); Element elem = (Element)ptr.getNode(); elem.setAttribute("id", "1"); %> child: <x:out select="$dom/root/child"/> child id: <x:out select="$dom/root/child/@id"/> Which produced: child: Child 1 child id: child: Child 1 child id: 1 It looks like there's also a way to add an attribute through the JXPath API, but you have to cast the Pointer to a NodePointer and the code's a bit uglier. Of course, if you're gonna drop down to Java, there are lots of other options for programmatically modifying DOM through XPath... Quoting "Mark R. Diggory" <[EMAIL PROTECTED]>: > > You can use JXPath to manipulate the content of the DOM directly (ie > without having to instantiate a whole new copied DOM object to establish > your changes (as you whould have to do with XSLT). > > Say you instantiate some DOM Document object, you can use JXPath as such: > > Document doc = ....; > JXPathContext context = JXPathContext.newContext(doc); > > Iterator iter = context.iteratePointers("//some[xpath]"); > while (iter.hasNext()) { > Pointer pointer = (Pointer) iter.next(); > System.out.println("value before change: " + pointer.getValue()); > pointer.setValue(value); > System.out.println("value after change: " + pointer.getValue()); > } > > .. Serialize your DOM to wherever using whatever. > > Yes, by scriptable, I mean you can write your java code between <%%> or > <jsp:scriptlet></jsp:scriptlet> > > Maybe someday there'll be a JXPath taglibrary which would make all this > all grovy in JSP. > > -Mark > > Kris Schneider wrote: > > >I'm not too familiar with JXPath, and I'm sure it's useful in other > contexts, > >but I don't see how it's applicable to Murray's problem. Can it be used to > add > >an attribute to an existing element? I'm also not sure I get the point > about > >"JXPath can be scripted into a JSP". Do you mean something besides: > > > ><% > >Foo fooCtx = (Foo)JXPathContext.newContext(myFoo); > >%> > > > >Quoting "Mark R. Diggory" <[EMAIL PROTECTED]>: > > > > > > > >>This is outside the scope of the taglibrary, JSTL xml taglibrary is for > >>presentation of xml content, not for its manipulation. I recommend > >>looking into a package such as JXPath to accomplish manipulation of the > >>content of a DOM object. the nice thing is that JXPath can be scripted > >>into a JSP, Servlet or Struts Action, which gives you the fredom to move > >>it out of the Presentation layer (where you probibly shouldn't be > >>placing such logic). > >> > >>http://jakarta.apache.org/commons/jxpath/ > >> > >>Good Luck > >>-Mark > >> > >>Murray Lang wrote: > >> > >> > >> > >>>Hi > >>>I've been using the XML tags in JSTL and found them very useful, > >>>however now I need to add an attribute to an XML element and have hit > >>>a brick wall. > >>> > >>>I've tried using <c:set> and EL, treating a DOM object as a bean, but > >>>the DOM interface is implementation-dependent and my implementation > >>>(xerces) doesn't lend itself to adding attributes with the simple EL > >>>view of bean properties. > >>> > >>>It seems to me that <x:set> needs to have a "target"attribute along > >>>the same lines as <c:set>, but accepting an XPath expression. > >>>eg > >>> <x:set select="12345" > >>>target="$myRoot//myElement[position()=0]/@myAttribute" /> > >>>where: > >>> - select can be either an XPath expression or an immediate value. > >>> - if @myAttribute doesn't currently exist in the element then it > >>>is created. > >>> > >>>Does this make sense? > >>>Is there a simple, portable, way of achieving this using JSTL as it > >>>stands? (Using <c:set> is not portable due to DOM being implementation > >>>dependent). > >>> > >>>Thanks > >>>Murray -- Kris Schneider <mailto:[EMAIL PROTECTED]> D.O.Tech <http://www.dotech.com/> --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
