org.apache.taglibs.request
Class ExistsQueryStringTag

java.lang.Object
  |
  +--javax.servlet.jsp.tagext.TagSupport
        |
        +--org.apache.taglibs.request.ExistsQueryStringTag

All Implemented Interfaces:

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

public class ExistsQueryStringTag

extends javax.servlet.jsp.tagext.TagSupport

JSP Tag existsquerystring, used to determine if an HttpServletRequest querystring parameter exists.

Includes the body of the tag if the querystring parameter exists.

You can set the optional tag querystring value to true or false. The body of the tag is included if existsquerystring matches the value.

JSP Tag Lib Descriptor

 <name>existsquerystring</name>
 <tagclass>org.apache.taglibs.request.ExistsQueryStringTag</tagclass>
 <bodycontent>JSP</bodycontent>
 <info>Includes the body of the tag if the request querystring parameter exists.</info>
   <attribute>
     <name>name</name>
     <required>true</required>
     <rtexprvalue>false</rtexprvalue>
   </attribute>
   <attribute>
     <name>value</name>
     <required>false</required>
     <rtexprvalue>false</rtexprvalue>
   </attribute>
 

Author:

Glenn Nielsen

See Also:

Serialized Form

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

id, pageContext

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

EVAL_BODY_INCLUDE, EVAL_PAGE, SKIP_BODY, SKIP_PAGE

Constructor Summary

ExistsQueryStringTag()

Method Summary

int	doStartTag() Includes the body of the tag if the request querystring parameter exists.
void	setName(java.lang.String str) Set the required tag attribute name.
void	setValue(boolean value) Set the optional tag attribute value to true or false.

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

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, toString, wait, wait, wait

Constructor Detail

ExistsQueryStringTag

public ExistsQueryStringTag()

Method Detail

doStartTag

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

Includes the body of the tag if the request querystring parameter exists.

Overrides:

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

Returns:

SKIP_BODY if existsquerystring doesn't match value, EVAL_BODY_include if existsquerystring matches value

setName

public final void setName(java.lang.String str)

Set the required tag attribute name.

Parameters:

String - name of input parameter in querystring

setValue

public final void setValue(boolean value)

Set the optional tag attribute value to true or false.

Parameters:

boolean - true or false