On 05/03/2007, at 5:39 PM, Caldarale, Charles R wrote:
From: Paul A. Hoadley [mailto:[EMAIL PROTECTED]
Subject: Re: Using getImplementationVersion() to read MANIFEST.MF
1. How can I read the value of the property from some arbitrary
class, say /WEB-INF/classes/some/package/Version.class?
You can use the following construct to create an InputStream
pointing to
the manifest file and then pass that to a Properties.load() to
retrieve
all the keys and values:
Properties prop = new Properties();
prop.load(getServletContext().getResourceAsStream("/META-INF/
MANIFEST.MF
"));
I ended up doing something quite like this (though using
java.util.jar.Manifest), but I was initially stuck at this point.
What I may not have made sufficiently clear in my original post is
that the class I'm using isn't a servlet itself: it's a JavaBean that
I'm instantiating from a JSP page (actually, from a custom tag
written as a JSPX fragment). Consequently, it couldn't call
getServletContext(). It took me a while, but I finally thought of a
solution---pass the ServletContext to the bean from the JSP via a
property of the bean:
<jsp:setProperty name="version" property="servletContext" value="$
{pageContext.servletContext}"/>
Is this the idiomatic way for a non-servlet object to obtain a
ServletContext, or am I overlooking something easier or more
appropriate?
--
Paul.
w http://logicsquad.net/
h http://paul.hoadley.name/
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