org.apache.struts.taglib.logic
Class PresentTag

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

All Implemented Interfaces:

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

Direct Known Subclasses:

NestedPresentTag, NotPresentTag

public class PresentTag

extends ConditionalTagBase

Evalute the nested body content of this tag if the specified value is present for this request.

Version:

$Revision: 1.1 $ $Date$

Author:

Craig R. McClanahan

See Also:

Serialized Form

Field Summary

static java.lang.String

ROLE_DELIMITER

Fields inherited from class org.apache.struts.taglib.logic.ConditionalTagBase

cookie, header, messages, name, parameter, property, role, scope, user

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

PresentTag()

Method Summary

protected boolean	condition() Evaluate the condition that is being tested by this particular tag, and return true if the nested body content of this tag should be evaluated, or false if it should be skipped.
protected boolean	condition(boolean desired) Evaluate the condition that is being tested by this particular tag, and return true if the nested body content of this tag should be evaluated, or false if it should be skipped.

Methods inherited from class org.apache.struts.taglib.logic.ConditionalTagBase

doEndTag, doStartTag, getCookie, getHeader, getName, getParameter, getProperty, getRole, getScope, getUser, release, setCookie, setHeader, setName, setParameter, setProperty, setRole, setScope, setUser

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

findAncestorWithClass, getId, getParent, getValue, getValues, removeValue, setId, setPageContext, setParent, setValue

Methods inherited from class java.lang.Object

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

Field Detail

ROLE_DELIMITER

public static final java.lang.String ROLE_DELIMITER

See Also:

Constant Field Values

Constructor Detail

PresentTag

public PresentTag()

Method Detail

condition

protected boolean condition()
                     throws javax.servlet.jsp.JspException

Evaluate the condition that is being tested by this particular tag, and return true if the nested body content of this tag should be evaluated, or false if it should be skipped. This method must be implemented by concrete subclasses.

Specified by:

condition in class ConditionalTagBase

Throws:

javax.servlet.jsp.JspException - if a JSP exception occurs

condition

protected boolean condition(boolean desired)
                     throws javax.servlet.jsp.JspException

Evaluate the condition that is being tested by this particular tag, and return true if the nested body content of this tag should be evaluated, or false if it should be skipped. This method must be implemented by concrete subclasses.

Parameters:

desired - Desired outcome for a true result

Throws:

javax.servlet.jsp.JspException - if a JSP exception occurs