Package jakarta.servlet.jsp.tagext
Class TagAdapter
java.lang.Object
jakarta.servlet.jsp.tagext.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.
- Since:
- JSP 2.0
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Field SummaryFields inherited from interface jakarta.servlet.jsp.tagext.TagEVAL_BODY_INCLUDE, EVAL_PAGE, SKIP_BODY, SKIP_PAGE
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Constructor SummaryConstructorsConstructorDescriptionTagAdapter(SimpleTag adaptee) Creates a new TagAdapter that wraps the given SimpleTag and returns the parent tag when getParent() is called.
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Method SummaryModifier and TypeMethodDescriptionintdoEndTag()Must not be called.intMust not be called.Gets the tag that is being adapted to the Tag interface.Returns the parent of this tag, which is always getAdaptee().getParent().voidrelease()Must not be called.voidMust not be called.voidMust not be called.
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Constructor Details- 
TagAdapterCreates a new TagAdapter that wraps the given SimpleTag and returns the parent tag when getParent() is called.- Parameters:
- adaptee- The SimpleTag being adapted as a Tag.
 
 
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Method Details- 
setPageContextMust not be called.- Specified by:
- setPageContextin interface- Tag
- Parameters:
- pc- ignored.
- Throws:
- UnsupportedOperationException- Must not be called
 
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setParentMust not be called. The parent of this tag is always getAdaptee().getParent().- Specified by:
- setParentin interface- Tag
- Parameters:
- parentTag- ignored.
- Throws:
- UnsupportedOperationException- Must not be called.
 
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getParentReturns the parent of this tag, which is always getAdaptee().getParent(). This will either be the enclosing Tag (if getAdaptee().getParent() implements Tag), or an adapter to the enclosing Tag (if getAdaptee().getParent() does not implement Tag).
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getAdapteeGets the tag that is being adapted to the Tag interface. This should be an instance of SimpleTag in JSP 2.0, but room is left for other kinds of tags in future spec versions.- Returns:
- the tag that is being adapted
 
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doStartTagMust not be called.- Specified by:
- doStartTagin interface- Tag
- Returns:
- always throws UnsupportedOperationException
- Throws:
- UnsupportedOperationException- Must not be called
- JspException- never thrown
- See Also:
 
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doEndTagMust not be called.- Specified by:
- doEndTagin interface- Tag
- Returns:
- always throws UnsupportedOperationException
- Throws:
- UnsupportedOperationException- Must not be called
- JspException- never thrown
 
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releasepublic void release()Must not be called.- Specified by:
- releasein interface- Tag
- Throws:
- UnsupportedOperationException- Must not be called
 
 
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