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BodyTagSupport (JavaServer Pages API Documentation)

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javax.servlet.jsp.tagext
Class BodyTagSupport

java.lang.Object
  javax.servlet.jsp.tagext.TagSupport
      javax.servlet.jsp.tagext.BodyTagSupport

All Implemented Interfaces:: BodyTag, IterationTag, JspTag, java.io.Serializable, Tag

public class BodyTagSupport
extends TagSupport
implements BodyTag

A base class for defining tag handlers implementing BodyTag.

The BodyTagSupport class implements the BodyTag interface and adds additional convenience methods including getter methods for the bodyContent property and methods to get at the previous out JspWriter.

Many tag handlers will extend BodyTagSupport and only redefine a few methods.

See Also:: Serialized Form

Field Summary

protected BodyContent bodyContent
          The current BodyContent for this BodyTag.

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

id, pageContext

Fields inherited from interface javax.servlet.jsp.tagext.BodyTag

EVAL_BODY_BUFFERED, EVAL_BODY_TAG

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

BodyTagSupport()
          Default constructor, all subclasses are required to only define a public constructor with the same signature, and to call the superclass constructor.

Method Summary

int doAfterBody()
          After the body evaluation: do not reevaluate and continue with the page.

int doEndTag()
          Default processing of the end tag returning EVAL_PAGE.

void doInitBody()
          Prepare for evaluation of the body just before the first body evaluation: no action.

int doStartTag()
          Default processing of the start tag returning EVAL_BODY_BUFFERED.

BodyContent getBodyContent()
          Get current bodyContent.

JspWriter getPreviousOut()
          Get surrounding out JspWriter.

void release()
          Release state.

void setBodyContent(BodyContent b)
          Prepare for evaluation of the body: stash the bodyContent away.

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

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

Methods inherited from interface javax.servlet.jsp.tagext.Tag

getParent, setPageContext, setParent

Field Detail

bodyContent

protected BodyContent bodyContent

The current BodyContent for this BodyTag.

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

Default processing of the start tag returning EVAL_BODY_BUFFERED.

Specified by:: doStartTag in interface Tag
Overrides:: doStartTag in class TagSupport

Returns:: EVAL_BODY_BUFFERED
Throws:: JspException - if an error occurred while processing this tag
See Also:: Tag.doStartTag()

doEndTag

public int doEndTag()
             throws JspException

Default processing of the end tag returning EVAL_PAGE.

Specified by:: doEndTag in interface Tag
Overrides:: doEndTag in class TagSupport

Returns:: EVAL_PAGE
Throws:: JspException - if an error occurred while processing this tag
See Also:: Tag.doEndTag()

setBodyContent

public void setBodyContent(BodyContent b)

Prepare for evaluation of the body: stash the bodyContent away.

Specified by:: setBodyContent in interface BodyTag

Parameters:: b - the BodyContent
See Also:: doAfterBody(), doInitBody(), BodyTag.setBodyContent(javax.servlet.jsp.tagext.BodyContent)

doInitBody

public void doInitBody()
                throws JspException

Prepare for evaluation of the body just before the first body evaluation: no action.

Specified by:: doInitBody in interface BodyTag

Throws:: JspException - if an error occurred while processing this tag
See Also:: setBodyContent(javax.servlet.jsp.tagext.BodyContent), doAfterBody(), BodyTag.doInitBody()

doAfterBody

public int doAfterBody()
                throws JspException

After the body evaluation: do not reevaluate and continue with the page. By default nothing is done with the bodyContent data (if any).

Specified by:: doAfterBody in interface IterationTag
Overrides:: doAfterBody in class TagSupport

Returns:: SKIP_BODY
Throws:: JspException - if an error occurred while processing this tag
See Also:: doInitBody(), IterationTag.doAfterBody()

release

public void release()

Release state.

Specified by:: release in interface Tag
Overrides:: release in class TagSupport

See Also:: Tag.release()

getBodyContent

public BodyContent getBodyContent()

Get current bodyContent.

Returns:: the body content.

getPreviousOut

public JspWriter getPreviousOut()

Get surrounding out JspWriter.

Returns:: the enclosing JspWriter, from the bodyContent.