Problem using jsp:include from inside a custom tag

Question

Hi, All !
          I have a problem using <jsp:include> from inside a custom tag. Exception is:
          "java.lang.ClassCastException: weblogic.servlet.jsp.BodyContentImpl"
          Apparently, weblogic tries to cast BodyContentImpl to JspWriterImpl and
          could not do this. Is it a bug, since in the 1.1 spec is said: "The
          BodyContent is a subclass of JspWriter that can be used to process body
          evaluations so they can retrieved later on."
          My code is:
          <wfmklist:items>
          <jsp:include page="item.jsp" flush="true"/>
          </wfmklist:items>
          

Answer 1

This is an area of contention with WL. It is not so tolerant with regards to
          the spec. I spent several days recently trying to convince it to accept the
          specification in regards to bodies and includes and it appears to have
          successfully rebuffed my efforts.
          Frankly, this is very disappointing. It appears that some shortcuts were
          taken on the way to JSP 1.1 support, and the result is a very hard-coded,
          inflexible implementation. As I have not seen the implementation myself, I
          hate to assume this, however one could posit that the term "interface" was a
          foreign concept during the implementation, other than as some annoying
          intermediary reference requiring an immediate cast to a specific Weblogic
          class, which in turn is apparently required to be final or have many final
          methods, as if being optimized for a JDK 1.02 JIT.
          I am sorry that I don't have any positive suggestions other than to use a
          URL object to come back in an execute the necessary "include" directly. You
          lose all context (other than session) and that can cause its own problems.
          However, you can generally get the URL approach to work, and you will
          hopefully avoid further frustration.
          Peace,
          Cameron Purdy
          Tangosol, Inc.
          http://www.tangosol.com
          Tangosol: How Weblogic applications are customized
          "Denis" <[email protected]> wrote in message
          news:[email protected]...
          > Hi, All !
          > I have a problem using <jsp:include> from inside a custom tag. Exception
          is:
          > "java.lang.ClassCastException: weblogic.servlet.jsp.BodyContentImpl"
          >
          > Apparently, weblogic tries to cast BodyContentImpl to JspWriterImpl and
          > could not do this. Is it a bug, since in the 1.1 spec is said: "The
          > BodyContent is a subclass of JspWriter that can be used to process body
          > evaluations so they can retrieved later on."
          >
          > My code is:
          > ...
          > <wfmklist:items>
          > <jsp:include page="item.jsp" flush="true"/>
          > </wfmklist:items>
          > ...