Custom tag with rendered attribute

Question

Is it possible to create a custom tag that operates similar to a JSF tag with the rendered attribute? Wrapping output with c:if test="..." is not as nice as the JSF rendered option, but I don't want to use JSF for this particular project.
Edited by: black_lotus on Nov 23, 2007 12:13 PM

Answer 1

TLD File, per your previous recommendation:
<attribute>
     <name>disabled</name>
     <required>false</required>
     <rtexprvalue>true</rtexprvalue>
     <type>boolean</type>
</attribute>My Tag class (snippet):
public class ButtonTag extends TagSupport
  private boolean disabled;
  public ButtonTag() {}
  public boolean isDisabled()
     return disabled;
  public void setDisabled(boolean b)
    disabled = b;
}A sample of the jsp file invoking it:
<c:set var="result" value="${computedValue}"/>
<ltm:button disabled="${result}"/>Regardless of the value of result, ("true" or "false") it always passes false to the setDisabled method of the button tag class.