Is it possible to access a modified query string in a RewriteCond *after* applying a RewriteRule?

Is it possible to access a modified query string in a RewriteCond after applying a RewriteRule?

What I'm trying is to apply ...

RewriteCond %{QUERY_STRING} ^(.*)&?id=([^&]+)&?(.*)$ [NC]
RewriteRule ^/app\.jsp$ /app/%2?%1%3 [R=302]

... to rewrite following urls into "nice" ones. That already works, but for (2) and (3) there are still unneccessary trailing "?" and "%" chars that I'd like to remove:

/app.jsp?id=123&b=1 -> /app/123?b=1    (1)
/app.jsp?id=123     -> /app/123?       (2)
/app.jsp?b=1&id=123 -> /app/123?b=1&   (3)

My idea is to add additional conditional RewriteRule's to remove the trailing "?" and "%" chars from the modified query string but I don't know how to access the latter within subsequent RewriteCond's. Thank you for any hints.

Ok, I found a simple solution myself:

RewriteCond   %{QUERY_STRING}       ^()id=([^&]+)(.*)$  [NC,OR]
RewriteCond \?%{QUERY_STRING}  ^(\?.*)&id=([^&]+)(.*)$  [NC]
RewriteRule ^/app\.jsp$ /app/%2%1%3                     [R=302,QSD,L]

Rewrite results:

/app.jsp?id=123&b=1      -> /app/123?b=1       (1)
/app.jsp?id=123          -> /app/123           (2)
/app.jsp?b=1&id=123      -> /app/123?b=1       (3)
/app.jsp?b=1&id=123&d=2  -> /app/123?b=1&d=2   (4)

Some remarks:

• successfully tested with Apache Tomcat's Rewrite Valve (see https://tomcat.apache.org/tomcat-9.0-doc/rewrite.html) for urls like https://example.com/my_webapp/app.jsp
• should work with Apache httpd as well, possibly with ^app instead of ^/app in the RewriteRule
• some .htaccess testers like https://htaccess.madewithlove.com/ don't seem to accept TestStrings like ?%{QUERY_STRING}. Such cases should therefore be tested directly with Tomcat (or httpd).