|
DRAFT | ||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | ||||||||
java.lang.Objectjavax.servlet.jsp.tagext.TagAdapter
public class TagAdapter
Wraps any SimpleTag and exposes it using a Tag interface. This is used to allow collaboration between classic Tag handlers and SimpleTag handlers.
Because SimpleTag does not extend Tag, and because Tag.setParent() only accepts a Tag instance, a classic tag handler (one that implements Tag) cannot have a SimpleTag as its parent. To remedy this, a TagAdapter is created to wrap the SimpleTag parent, and the adapter is passed to setParent() instead. A classic Tag Handler can call getAdaptee() to retrieve the encapsulated SimpleTag instance.
| Field Summary |
|---|
| Fields inherited from interface javax.servlet.jsp.tagext.Tag |
|---|
EVAL_BODY_INCLUDE, EVAL_PAGE, SKIP_BODY, SKIP_PAGE |
| Constructor Summary | |
|---|---|
TagAdapter(SimpleTag adaptee)
Creates a new TagAdapter that wraps the given SimpleTag and returns the parent tag when getParent() is called. |
|
| Method Summary | |
|---|---|
int |
doEndTag()
Must not be called. |
int |
doStartTag()
Must not be called. |
JspTag |
getAdaptee()
Gets the tag that is being adapted to the Tag interface. |
Tag |
getParent()
Returns the parent of this tag, which is always getAdaptee().getParent(). |
void |
release()
Must not be called. |
void |
setPageContext(PageContext pc)
Must not be called. |
void |
setParent(Tag parentTag)
Must not be called. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
public TagAdapter(SimpleTag adaptee)
adaptee - The SimpleTag being adapted as a Tag.| Method Detail |
|---|
public void setPageContext(PageContext pc)
setPageContext in interface Tagpc - ignored.
java.lang.UnsupportedOperationException - Must not be calledpublic void setParent(Tag parentTag)
setParent in interface TagparentTag - ignored.
java.lang.UnsupportedOperationException - Must not be called.public Tag getParent()
getParent in interface TagTagSupport#findAncestorWithClasspublic JspTag getAdaptee()
public int doStartTag()
throws JspException
doStartTag in interface Tagjava.lang.UnsupportedOperationException - Must not be called
JspException - never thrownBodyTag
public int doEndTag()
throws JspException
doEndTag in interface Tagjava.lang.UnsupportedOperationException - Must not be called
JspException - never thrownpublic void release()
release in interface Tagjava.lang.UnsupportedOperationException - Must not be called
|
DRAFT | ||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | ||||||||
Copyright © 2009 Sun Microsystems, Inc. All Rights Reserved. Use is subject to license terms.
Generated on 24-November-2009 03:24