Steve
Thanks.
Can you point me to the class that is meant to do the substitution, so that
I can put in some diags of my own?
Cheers
Tony
----- Original Message -----
From: "Stephen C. Upton" <[EMAIL PROTECTED]>
To: "BtOW" <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Friday, October 18, 2002 1:50 PM
Subject: Re: [dom4j-user] re: Can I use XPath expression as prepared
statements?
> Tony,
>
> Yea, I'm going to have to go back and hit the books (aka docs). I got this
to
> work for your example, but can't not get some of my stuff to work, which
is only
> a little more complicated, i.e., I use "and" as part of my selection
criteria.
>
> However, to answer your question, I'm using the dom4j-full.jar dated
9/24/02
> (one of the daily builds, as I was having problems with the XMLWriter on
another
> problem). I'm not sure what version of jaxen it's using (when I unpack the
jar,
> it appears the dates on the jaxen classes are 4/26/02)
>
> good luck
> steve
>
> BtOW wrote:
>
> > Steve, thanks for your prompt response. I can see the quotes make better
> > sense. However, it still won't work on my machine - it's failing to do
the
> > substitution. I'd expect getText() to return the string with the
> > substitution in place already.
> >
> > To illustrate, I've changed the System.out.println()s to:
> >
> > System.out.println("A " + xp.getText());
> > System.out.println("B " + doc.valueOf(xp.getText()));
> >
> > The output I get is:
> >
> > A /StateTable/Action[InputEvent="Cash"]/ProcessFile
> > B Cash.xsl
> > A /StateTable/Action[InputEvent="$x"]/ProcessFile
> > B
> >
> > Maybe I'm using a different version. I have jaxen-1.0-FCS and
> > dom4j-patched-1.3
> >
> > Cheers
> >
> > Tony
> >
> > > Tony,
> > >
> > > There was an error in James example. Replace your line with this:
> > > "/StateTable/Action[InputEvent=\"$x\"]/ProcessFile",
> > >
> > > with the escaped quotes around the variable, and it works fine. I get
> > > "Cash.xsl" as the output.
> > >
> > > steve
> > >
> > > Tony Ms wrote:
> > >
> > > > Back in May, James Strachan answered a query with this:
> > > >
> > > > Yes its very possible indeed. The trick is to use XPath variables.
e.g.
> > > >
> > > > import org.jaxen.SimpleVariableContext;
> > > >
> > > > SimpleVariableContext variables = new SimpleVariableContext();
> > > > XPath xpath = doc.createXPath( "//foo[@doo=$x]" );
> > > > xpath.setVariableContext( variables );
> > > >
> > > > Then you can set whatever variable value you want for 'x' and apply
the
> > > > XPath to any node.
> > > >
> > > > variables.setVariableValue( "x", "abc" );
> > > > List answer = xpath.selectNodes( document );
> > > > List answer = xpath.selectNodes( someNode );
> > > >
> > > > I've been trying to get this to go, and having a problem. Here is
my
> > > > program:
> > > >
> > > > import java.io.*;
> > > > import java.util.*;
> > > > import org.dom4j.*;
> > > > import org.dom4j.io.*;
> > > > import org.dom4j.xpath.*;
> > > > import org.jaxen.SimpleVariableContext;
> > > >
> > > > public class XPathTest {
> > > > static String s1 = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>";
> > > > static String s2 = "<StateTable>";
> > > > static String s3 = "<Action>";
> > > > static String s4 = "<InputEvent>Cash</InputEvent>";
> > > > static String s5 = "<ProcessFile>Cash.xsl</ProcessFile>";
> > > > static String s6 = "</Action>";
> > > > static String s7 = "</StateTable>";
> > > >
> > > > public static void main(String[] args){
> > > > (new XPathTest()).go(s1+s2+s3+s4+s5+s6+s7,
> > > > "/StateTable/Action[InputEvent=\"Cash\"]/ProcessFile",
> > > > "n/a");
> > > > (new XPathTest()).go(s1+s2+s3+s4+s5+s6+s7,
> > > > "/StateTable/Action[InputEvent=$x]/ProcessFile",
> > > > "Cash");
> > > > }
> > > >
> > > > void go(String theXML, String expr, String para){
> > > > try
> > > > {
> > > > SAXReader reader = new SAXReader(false);
> > > > Document doc = reader.read(new StringReader(theXML));
> > > > XPath xp = doc.createXPath(expr);
> > > > SimpleVariableContext vc = new SimpleVariableContext();
> > > > xp.setVariableContext(vc);
> > > > vc.setVariableValue("x", para);
> > > > System.out.println(doc.valueOf(xp.getText()));
> > > > }
> > > > catch (Exception e)
> > > > {
> > > > e.printStackTrace(System.out);
> > > > }
> > > > }
> > > > }
> > > >
> > > > The first call to go(), not using a variable, works fine. The second
> > bombs
> > > > with:
> > > >
> > > > org.dom4j.XPathException: Exception occurred evaluting XPath:
> > > > /StateTable/Action
> > > > [InputEvent=$x]/ProcessFile. Exception: Variable {null}:x
> > > >
> > > > I'd much appreciate some assistance in finding out what's wrong.
> > > >
> > > > Cheers
> > > >
> > > > Tony
> >
> > > > dom4j-user mailing list
> > > > [EMAIL PROTECTED]
> > > > https://lists.sourceforge.net/lists/listinfo/dom4j-user
> > >
>
>
>
>
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