DebugTag.java Custom tag that optionally makes use of a tag body
package cwp.tags;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import java.io.*;
import javax.servlet.*;
/** A tag that includes the body content only if
* the "debug" request parameter is set.
* <P>
* Taken from Core Web Programming Java 2 Edition
* from Prentice Hall and Sun Microsystems Press,
* .
* May be freely used or adapted.
*/
public class DebugTag extends TagSupport {
public int doStartTag() {
ServletRequest request = pageContext.getRequest();
String debugFlag = request.getParameter("debug");
if ((debugFlag != null) &&
(!debugFlag.equalsIgnoreCase("false"))) {
return(EVAL_BODY_INCLUDE);
} else {
return(SKIP_BODY);
}
}
}