org.apache.struts.taglib
Class IfParameterNullTag

java.lang.Object
  |
  +--javax.servlet.jsp.tagext.TagSupport
        |
        +--org.apache.struts.taglib.IfParameterNullTag

All Implemented Interfaces:

javax.servlet.jsp.tagext.IterationTag, java.io.Serializable, javax.servlet.jsp.tagext.Tag

public class IfParameterNullTag

extends javax.servlet.jsp.tagext.TagSupport

Conditionally include the body of this tag if the specified parameter is not present in the current request, or it is present as a zero length string.

Version:

$Revision: 1.2 $ $Date: 2000/08/01 20:03:34 $

Author:

Craig R. McClanahan

See Also:

Serialized Form

Field Summary

protected java.lang.String

name The name of the parameter being compared.

Fields inherited from class javax.servlet.jsp.tagext.TagSupport

id, pageContext, parent, values

Fields inherited from interface javax.servlet.jsp.tagext.IterationTag

EVAL_BODY_AGAIN

Fields inherited from interface javax.servlet.jsp.tagext.Tag

EVAL_BODY_INCLUDE, EVAL_PAGE, SKIP_BODY, SKIP_PAGE

Constructor Summary

IfParameterNullTag()

Method Summary

int	doStartTag() Retrieve the specified parameter, and decide whether or not to include the body content.
java.lang.String	getName() Return the parameter name.
void	setName(java.lang.String name) Set the parameter name.

Methods inherited from class javax.servlet.jsp.tagext.TagSupport

doAfterBody, doEndTag, findAncestorWithClass, getId, getParent, getValue, getValues, release, removeValue, setId, setPageContext, setParent, setValue

Methods inherited from class java.lang.Object

, clone, equals, finalize, getClass, hashCode, notify, notifyAll, registerNatives, toString, wait, wait, wait

Field Detail

name

protected java.lang.String name

The name of the parameter being compared.

Constructor Detail

IfParameterNullTag

public IfParameterNullTag()

Method Detail

getName

public java.lang.String getName()

Return the parameter name.

setName

public void setName(java.lang.String name)

Set the parameter name.

Parameters:

name - The new parameter name

doStartTag

public int doStartTag()
               throws javax.servlet.jsp.JspException

Retrieve the specified parameter, and decide whether or not to include the body content.

Overrides:

doStartTag in class javax.servlet.jsp.tagext.TagSupport

Throws:

javax.servlet.jsp.JspException - if a JSP exception has occurred