Custom Tag with boolean Attribute problems

Question

Hi,
I've created a simple custom tag that is expecting a boolean attribute called "disabled". In my Tag derived class I've created a setDisabled(boolean b) method and set the following in the tag descriptor:
<attribute>
     <name>disabled</name>
     <required>false</required>
     <rtexprvalue>true</rtexprvalue>
</attribute>I'm using a JSTL expression "${someExpression}" which, when I do a c:out on the value, returns true.
I call the tag like this:
<mytag disabled="${someExpression}"/>However, in my custom tag class the value is passed as false. I can get true passed in if I hard code it, but that isn't going to work.
I've tried a number of different combinations and even read through this forum for the last 2 hours and cannot seem to figure it out.
What am I doing wrong?
Thanks,
John

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.