Java Doc for TagAdapter.java in » 6.0-JDK-Core » Servlet-API-by-tomcat » javax » servlet » jsp » tagext » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Document (Java Doc)

TagAdapter
public class TagAdapter implements Tag(Code)
	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: 2.0

Constructor Summary
public	TagAdapter(SimpleTag adaptee) Creates a new TagAdapter that wraps the given SimpleTag and returns the parent tag when getParent() is called.

Method Summary
public int	doEndTag() Must not be called.
public int	doStartTag() Must not be called.
public JspTag	getAdaptee() Gets the tag that is being adapted to the Tag interface.
public Tag	getParent() Returns the parent of this tag, which is always getAdaptee().getParent().
public void	release() Must not be called.
public void	setPageContext(PageContext pc) Must not be called.
public void	setParent(Tag parentTag) Must not be called.

Constructor Detail

TagAdapter
public TagAdapter(SimpleTag adaptee)(Code)
	Creates 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.

Method Detail

doEndTag
public int doEndTag() throws JspException(Code)
	Must not be called. always throws UnsupportedOperationException throws: UnsupportedOperationException - Must not be called throws: JspException - never thrown

doStartTag
public int doStartTag() throws JspException(Code)
	Must not be called. always throws UnsupportedOperationException throws: UnsupportedOperationException - Must not be called throws: JspException - never thrown

getAdaptee
public JspTag getAdaptee()(Code)
	Gets 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. the tag that is being adapted

getParent
public Tag getParent()(Code)
	Returns 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). The parent of the tag being adapted.

release
public void release()(Code)
	Must not be called. throws: UnsupportedOperationException - Must not be called

setPageContext
public void setPageContext(PageContext pc)(Code)
	Must not be called. Parameters: pc - ignored. throws: UnsupportedOperationException - Must not be called

setParent
public void setParent(Tag parentTag)(Code)
	Must not be called. The parent of this tag is always getAdaptee().getParent(). Parameters: parentTag - ignored. throws: UnsupportedOperationException - Must not be called.

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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