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JET: accessing JET variables from inline java [message #55768]

Tue, 20 January 2009 19:46

Eclipse User

Originally posted by: johannes.nel.gmail.com

Hi all

In a JET template is there a way for me to access xpath variables from
inline Java.

<c:setVariable var="path" select="getPathFromPackage($curItem/@package)"/>
<% System.out.println($path); %>

thanks johan

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Re: accessing JET variables from inline java [message #55854 is a reply to message #55768]

Wed, 21 January 2009 16:51

Paul Elder

Messages: 849
Registered: July 2009

Senior Member

Johan:

There is JET2Context.getVariable:

http://help.eclipse.org/ganymede/topic/org.eclipse.jet.doc/r eferences/javadoc/org/eclipse/jet/JET2Context.html#getVariab le(java.lang.String)

The variable 'context' is predefined in your template.

But, you may find that the type of the value returned is sometimes a
NodeSet (depending on the original expression). You can use use
XPathUtil.xpathString():

http://help.eclipse.org/ganymede/topic/org.eclipse.jet.doc/r eferences/javadoc/org/eclipse/jet/xpath/XPathUtil.html#xpath String(java.lang.Object)

It will convert the result to a String:
<%@jet imports="org.eclipse.jet.xpath.XPathUtil" %>
<%= System.out.println(XPathUtil.xpathString(context.getVariable ( "path")) %>

Finally, if all you are doing is trying to inject trace statements into your
transformation, why not try the <c:log> tag:

http://help.eclipse.org/ganymede/topic/org.eclipse.jet.doc/r eferences/taglibs/controlTags/logTag.html

<c:log><c:get select="$path"/></c:log>

The tag has an optional attribute that specifies the log level. By default,
an executing JET transformation writes only info, warning and error
messages. This can be changed in the JET launch configuration.

Paul

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