Class BodyTagSupport

  • All Implemented Interfaces:
    java.io.Serializable, BodyTag, Tag

    public class BodyTagSupport
    extends TagSupport
    implements BodyTag
    Actions in a Tag Library are defined through subclasses of Tag.
    See Also:
    Serialized Form
    • Constructor Detail

      • BodyTagSupport

        public BodyTagSupport()
        Default constructor, all subclasses are required to only define a public constructor with the same signature, and to call the superclass constructor. This constructor is called by the code generated by the JSP translator.
    • Method Detail

      • doStartTag

        public int doStartTag()
                       throws JspException
        Process the start tag for this instance. The doStartTag() method assumes that all setter methods have been invoked before. When this method is invoked, the body has not yet been invoked.
        Specified by:
        doStartTag in interface Tag
        Overrides:
        doStartTag in class TagSupport
        Throws:
        JspException
        See Also:
        BodyTag
      • doEndTag

        public int doEndTag()
                     throws JspException
        Process the end tag. This method will be called on all Tag objects. All instance state associated with this instance must be reset. The release() method should be called after this invocation.
        Specified by:
        doEndTag in interface Tag
        Overrides:
        doEndTag in class TagSupport
        Throws:
        JspException
      • setBodyContent

        public void setBodyContent​(BodyContent b)
        Prepare for evaluation of the body It will be invoked at most once per action invocation. Will not be invoked if there is no body evaluation. Frequently it is not redefined by Tag author.
        Specified by:
        setBodyContent in interface BodyTag
        Parameters:
        b - the BodyContent
      • doInitBody

        public void doInitBody()
                        throws JspException
        Prepare for evaluation of the body It will be invoked at most once per action invocation. Will not be invoked if there is no body evaluation. Frequently it is not redefined by Tag author.
        Specified by:
        doInitBody in interface BodyTag
        Throws:
        JspException
      • doAfterBody

        public int doAfterBody()
                        throws JspException
        Actions after some body has been evaluated. Not invoked in empty tags or in tags returning SKIP_BODY in doStartTag() This method is invoked after every body evaluation. The pair "BODY -- doAfterBody()" is invoked initially if doStartTag() returned EVAL_BODY_TAG, and it is repeated as long as the doAfterBody() evaluation returns EVAL_BODY_TAG

        The method re-invocations may be lead to different actions because there might have been some changes to shared state, or because of external computation.

        Specified by:
        doAfterBody in interface BodyTag
        Throws:
        JspException
      • release

        public void release()
        reset the state of the Tag
        Specified by:
        release in interface Tag
        Overrides:
        release in class TagSupport
      • getBodyContent

        public BodyContent getBodyContent()
        Get current bodyContent
      • getPreviousOut

        public JspWriter getPreviousOut()
        Get surrounding out