org.apache.struts.taglib.logic
Class MessagesPresentTag

java.lang.Object
  extended by javax.servlet.jsp.tagext.TagSupport
      extended by org.apache.struts.taglib.logic.ConditionalTagBase
          extended by org.apache.struts.taglib.logic.MessagesPresentTag
All Implemented Interfaces:
Serializable, IterationTag, Tag
Direct Known Subclasses:
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


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