org.apache.taglibs.standard.tag.common.core
Class ChooseTag

java.lang.Object
  javax.servlet.jsp.tagext.TagSupport
      org.apache.taglibs.standard.tag.common.core.ChooseTag

All Implemented Interfaces:

Serializable, javax.servlet.jsp.tagext.IterationTag, javax.servlet.jsp.tagext.JspTag, javax.servlet.jsp.tagext.Tag

public class ChooseTag
extends javax.servlet.jsp.tagext.TagSupport

Tag handler for <choose> in JSTL.

<choose> is a very simple tag that acts primarily as a container; it always includes its body and allows exactly one of its child <when> tags to run. Since this tag handler doesn't have any attributes, it is common.core to both the rtexprvalue and expression- evaluating versions of the JSTL library.

Author:

Shawn Bayern

See Also:

Serialized Form

Field Summary

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

ChooseTag()

Method Summary

int	doStartTag()
boolean	gainPermission() Returns status indicating whether a subtag should run or not.
void	release()
void	subtagSucceeded() Called by a subtag to indicate that it plans to evaluate its body.

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

doAfterBody, doEndTag, 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

Constructor Detail

ChooseTag

public ChooseTag()

Method Detail

release

public void release()

Specified by:

release in interface javax.servlet.jsp.tagext.Tag

Overrides:

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

gainPermission

public boolean gainPermission()

Returns status indicating whether a subtag should run or not.

Returns:

true if the subtag should evaluate its condition and decide whether to run, false otherwise.

subtagSucceeded

public void subtagSucceeded()

Called by a subtag to indicate that it plans to evaluate its body.

doStartTag

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

Specified by:

doStartTag in interface javax.servlet.jsp.tagext.Tag

Overrides:

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

Throws:

javax.servlet.jsp.JspException