org.apache.struts.taglib.logic
Class MessagesPresentTag

java.lang.Object
  javax.servlet.jsp.tagext.TagSupport
      org.apache.struts.taglib.logic.ConditionalTagBase
          org.apache.struts.taglib.logic.MessagesPresentTag

All Implemented Interfaces:

Serializable, IterationTag, Tag

Direct Known Subclasses:

ELMessagesPresentTag, MessagesNotPresentTag, NestedMessagesPresentTag

public class MessagesPresentTag
extends ConditionalTagBase

Evalute to true if an ActionMessages class or a class that can be converted to an ActionMessages class is in request scope under the specified key and there is at least one message in the class or for the property specified.

Since:

Struts 1.1

Version:

$Rev: 471754 $ $Date: 2005-11-19 12:36:20 -0500 (Sat, 19 Nov 2005) $

See Also:

Serialized Form

Field Summary

protected String

message If this is set to 'true', then the Globals.MESSAGE_KEY will be used to retrieve the messages from scope.

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.IterationTag

EVAL_BODY_AGAIN

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

EVAL_BODY_INCLUDE, EVAL_PAGE, SKIP_BODY, SKIP_PAGE

Constructor Summary

MessagesPresentTag()

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 there is at least one message in the class or for the property specified.
String	getMessage()
void	release() Release all allocated resources.
void	setMessage(String message)

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

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

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

doAfterBody, 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

message

protected String message

If this is set to 'true', then the Globals.MESSAGE_KEY will be used to retrieve the messages from scope.

Constructor Detail

MessagesPresentTag

public MessagesPresentTag()

Method Detail

getMessage

public String getMessage()

setMessage

public void setMessage(String message)

condition

protected boolean condition()
                     throws 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.

Specified by:

condition in class ConditionalTagBase

Throws:

JspException - if a JSP exception occurs

condition

protected boolean condition(boolean desired)
                     throws JspException

Evaluate the condition that is being tested by this particular tag, and return true if there is at least one message in the class or for the property specified.

Parameters:

desired - Desired outcome for a true result

Throws:

JspException - if a JSP exception occurs

release

public void release()

Release all allocated resources.

Specified by:

release in interface Tag

Overrides:

release in class ConditionalTagBase