com.taggercat.tags
Class PageSequenceTag

java.lang.Object
  javax.servlet.jsp.tagext.TagSupport
      com.taggercat.tags.PageSequenceTag

All Implemented Interfaces:

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

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

This tag generates an unique page sequence number. The sequence number can be used in request handlers to ensure the user is submitting pages in the intended order.

This is most often used to prevent the same form instance from being submitted multiple times. It can also be used to prevent the user from using the browsers' back button to a previous page and then re-submitting it.

The abstract request handler automatically processes the page sequence value if it is present.

See Also:

Serialized Form

Field Summary

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

PageSequenceTag()

Method Summary

int	doStartTag() Processes the tag, and creates the hidden form element.

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

doAfterBody, doEndTag, findAncestorWithClass, getId, getParent, getValue, getValues, release, removeValue, setId, setPageContext, setParent, setValue

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PageSequenceTag

public PageSequenceTag()

Method Detail

doStartTag

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

Processes the tag, and creates the hidden form element.

Specified by:

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

Overrides:

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

Throws:

javax.servlet.jsp.JspException

Returns:

SKIP_BODY this tag does not have a body