Class 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

      Constructors 
      Constructor Description
      ChooseTag()  
    • 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