org.apache.struts.taglib.logic
Class EmptyTag
java.lang.Object
javax.servlet.jsp.tagext.TagSupport
org.apache.struts.taglib.logic.ConditionalTagBase
org.apache.struts.taglib.logic.EmptyTag
- All Implemented Interfaces:
- Serializable, IterationTag, Tag
- Direct Known Subclasses:
- NestedEmptyTag, NotEmptyTag
public class EmptyTag
- extends ConditionalTagBase
Evalute the nested body content of this tag if the specified value is empty
for this request.
- Since:
- Struts 1.1
- Version:
- $Rev: 471754 $ $Date: 2004-10-16 12:38:42 -0400 (Sat, 16 Oct 2004)
$
- See Also:
- Serialized Form
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 |
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 |
EmptyTag
public EmptyTag()
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. This
method must be implemented by concrete subclasses.
- 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 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:
JspException
- if a JSP exception occurs
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