CODEWITHSUNDEEP
jspincludejsp-tagstagfile
j5423951
j5423951

Reputation: 140

Pass along jsp:param tags from custom tag to a jsp:include tag?

I'm trying to create a tag file that in a way "extends" the <jsp:include> tag. Basically I want to add custom logic so that in certain circumstances it will include a different file. I got it working fine for regular <jsp:include> tags, but I'm still struggling when there are <jsp:param> tags in the picture.

What I want to be able to do is this:

In the normal jsp code, main.jsp:

<custom:jsp-include page="include.jsp">
    <jsp:param name="a" value="b"/>
    <jsp:param name="x" value="y"/>
</custom:jsp-include>

And in the tag file, customInclude.tag:

...

<jsp:include page="${someJspFile}">
    //SOMETHING-UNKNOWN-HERE
</jsp:include>

And the expected result is that the file in the variable someJspFile is called, with all the parameters defined in the main.jsp. Ie parameter a=b and x=y in this case.

But I don't know how to make this happen. I have tried using <jsp:doBody var="bodyContent"/>, and then put ${bodyContent} inside the <jsp:include>, but that just results in an error. The error depends on the type of body-content I have defined for the tag file. If I set it to "tagdependent" then the error is:

Expecting "jsp:param" standard action with "name" and "value" attributes

...and if I set it to "scriptless", then the error is for the main.jsp code, with the error:

The jsp:param action must not be used outside the jsp:include, jsp:forward, or jsp:params elements

Surely there must be a way to achieve this? Or of a more more general point of view, there must be a way to pass along the body content as untouched, from one tag (my custom tag file in this case) to another (<jsp:include> in this case), right?

Note that it's not specifically the possibility to put ${bodyContent} inside the <jsp:include> tag that I am after, since I can see how that could be considered as an eval type function if it would work, and it's not the possibility of doing eval that I am after. Maybe there is some special placeholder or similar, that I can put inside the <jsp:include> tag, that will make it work just as if I had copy pasted the <jsp:param> tags from main.jsp into the body of the <jsp:include> in customInclude.tag?

Regards

/Jimi

Upvotes: 1

Views: 198

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