[Bug 55788] New: TagPlugins should key on tag QName rather than implementation class

[bu...@apache.org]

https://issues.apache.org/bugzilla/show_bug.cgi?id=55788

            Bug ID: 55788
           Summary: TagPlugins should key on tag QName rather than
                    implementation class
           Product: Tomcat 8
           Version: trunk
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: Jasper
          Assignee: dev@tomcat.apache.org
          Reporter: jboynes@apache.org

Tag plugins key off a tag's implementation class, for example:
  <tag-plugin>
    <tag-class>org.apache.taglibs.standard.tag.rt.core.IfTag</tag-class>
    <plugin-class>org.apache.jasper.tagplugins.jstl.core.If</plugin-class>
  </tag-plugin>

This is fragile, for example, if the class name changes or if multiple tags
happen to use the same class name. It also means the plugin will not recognize
alternate implementations of the same tag, and cannot be used to adapt
tagfiles.

Instead, the plugin should key off the tag's fully qualified name (TLD URI +
name) such as {http://java.sun.com/jsp/jstl/core, if} for the JSTL <c:if> tag
above.

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