simpletagsupport.html

j2ee帮助文档软件设计/软件工程 文件格式

</TABLE>

<A NAME="doTag()"><!-- --></A><H3>
doTag</H3>
<PRE>
public void <B>doTag</B>()
           throws <A HREF="../../../../javax/servlet/jsp/JspException.html" title="class in javax.servlet.jsp">JspException</A>,
                  <A HREF="http://java.sun.com/j2se/1.5/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD>Default processing of the tag does nothing.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../javax/servlet/jsp/tagext/SimpleTag.html#doTag()">doTag</A></CODE> in interface <CODE><A HREF="../../../../javax/servlet/jsp/tagext/SimpleTag.html" title="interface in javax.servlet.jsp.tagext">SimpleTag</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../javax/servlet/jsp/JspException.html" title="class in javax.servlet.jsp">JspException</A></CODE> - Subclasses can throw JspException to indicate
     an error occurred while processing this tag.
<DD><CODE><A HREF="../../../../javax/servlet/jsp/SkipPageException.html" title="class in javax.servlet.jsp">SkipPageException</A></CODE> - If the page that
     (either directly or indirectly) invoked this tag is to
     cease evaluation.  A Simple Tag Handler generated from a 
     tag file must throw this exception if an invoked Classic 
     Tag Handler returned SKIP_PAGE or if an invoked Simple
     Tag Handler threw SkipPageException or if an invoked Jsp Fragment
     threw a SkipPageException.
<DD><CODE><A HREF="http://java.sun.com/j2se/1.5/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE> - Subclasses can throw IOException if there was
     an error writing to the output stream<DT><B>See Also:</B><DD><A HREF="../../../../javax/servlet/jsp/tagext/SimpleTag.html#doTag()"><CODE>SimpleTag.doTag()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="setParent(javax.servlet.jsp.tagext.JspTag)"><!-- --></A><H3>
setParent</H3>
<PRE>
public void <B>setParent</B>(<A HREF="../../../../javax/servlet/jsp/tagext/JspTag.html" title="interface in javax.servlet.jsp.tagext">JspTag</A>&nbsp;parent)</PRE>
<DL>
<DD>Sets the parent of this tag, for collaboration purposes.
 <p>
 The container invokes this method only if this tag invocation is
 nested within another tag invocation.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../javax/servlet/jsp/tagext/SimpleTag.html#setParent(javax.servlet.jsp.tagext.JspTag)">setParent</A></CODE> in interface <CODE><A HREF="../../../../javax/servlet/jsp/tagext/SimpleTag.html" title="interface in javax.servlet.jsp.tagext">SimpleTag</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>parent</CODE> - the tag that encloses this tag</DL>
</DD>
</DL>
<HR>

<A NAME="getParent()"><!-- --></A><H3>
getParent</H3>
<PRE>
public <A HREF="../../../../javax/servlet/jsp/tagext/JspTag.html" title="interface in javax.servlet.jsp.tagext">JspTag</A> <B>getParent</B>()</PRE>
<DL>
<DD>Returns the parent of this tag, for collaboration purposes.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../javax/servlet/jsp/tagext/SimpleTag.html#getParent()">getParent</A></CODE> in interface <CODE><A HREF="../../../../javax/servlet/jsp/tagext/SimpleTag.html" title="interface in javax.servlet.jsp.tagext">SimpleTag</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the parent of this tag</DL>
</DD>
</DL>
<HR>

<A NAME="setJspContext(javax.servlet.jsp.JspContext)"><!-- --></A><H3>
setJspContext</H3>
<PRE>
public void <B>setJspContext</B>(<A HREF="../../../../javax/servlet/jsp/JspContext.html" title="class in javax.servlet.jsp">JspContext</A>&nbsp;pc)</PRE>
<DL>
<DD>Stores the provided JSP context in the private jspContext field.
 Subclasses can access the <code>JspContext</code> via 
 <code>getJspContext()</code>.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../javax/servlet/jsp/tagext/SimpleTag.html#setJspContext(javax.servlet.jsp.JspContext)">setJspContext</A></CODE> in interface <CODE><A HREF="../../../../javax/servlet/jsp/tagext/SimpleTag.html" title="interface in javax.servlet.jsp.tagext">SimpleTag</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>pc</CODE> - the page context for this invocation<DT><B>See Also:</B><DD><A HREF="../../../../javax/servlet/jsp/tagext/SimpleTag.html#setJspContext(javax.servlet.jsp.JspContext)"><CODE>SimpleTag.setJspContext(javax.servlet.jsp.JspContext)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getJspContext()"><!-- --></A><H3>
getJspContext</H3>
<PRE>
protected <A HREF="../../../../javax/servlet/jsp/JspContext.html" title="class in javax.servlet.jsp">JspContext</A> <B>getJspContext</B>()</PRE>
<DL>
<DD>Returns the page context passed in by the container via 
 setJspContext.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the page context for this invocation</DL>
</DD>
</DL>
<HR>

<A NAME="setJspBody(javax.servlet.jsp.tagext.JspFragment)"><!-- --></A><H3>
setJspBody</H3>
<PRE>
public void <B>setJspBody</B>(<A HREF="../../../../javax/servlet/jsp/tagext/JspFragment.html" title="class in javax.servlet.jsp.tagext">JspFragment</A>&nbsp;jspBody)</PRE>
<DL>
<DD>Stores the provided JspFragment.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../javax/servlet/jsp/tagext/SimpleTag.html#setJspBody(javax.servlet.jsp.tagext.JspFragment)">setJspBody</A></CODE> in interface <CODE><A HREF="../../../../javax/servlet/jsp/tagext/SimpleTag.html" title="interface in javax.servlet.jsp.tagext">SimpleTag</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>jspBody</CODE> - The fragment encapsulating the body of this tag.
     If the action element is empty in the page, this method is 
     not called at all.<DT><B>See Also:</B><DD><A HREF="../../../../javax/servlet/jsp/tagext/SimpleTag.html#setJspBody(javax.servlet.jsp.tagext.JspFragment)"><CODE>SimpleTag.setJspBody(javax.servlet.jsp.tagext.JspFragment)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getJspBody()"><!-- --></A><H3>
getJspBody</H3>
<PRE>
protected <A HREF="../../../../javax/servlet/jsp/tagext/JspFragment.html" title="class in javax.servlet.jsp.tagext">JspFragment</A> <B>getJspBody</B>()</PRE>
<DL>
<DD>Returns the body passed in by the container via setJspBody.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the fragment encapsulating the body of this tag, or
    null if the action element is empty in the page.</DL>
</DD>
</DL>
<HR>

<A NAME="findAncestorWithClass(javax.servlet.jsp.tagext.JspTag, java.lang.Class)"><!-- --></A><H3>
findAncestorWithClass</H3>
<PRE>
public static final <A HREF="../../../../javax/servlet/jsp/tagext/JspTag.html" title="interface in javax.servlet.jsp.tagext">JspTag</A> <B>findAncestorWithClass</B>(<A HREF="../../../../javax/servlet/jsp/tagext/JspTag.html" title="interface in javax.servlet.jsp.tagext">JspTag</A>&nbsp;from,
                                                 <A HREF="http://java.sun.com/j2se/1.5/docs/api/java/lang/Class.html" title="class or interface in java.lang">Class</A>&lt;?&gt;&nbsp;klass)</PRE>
<DL>
<DD>Find the instance of a given class type that is closest to a given
 instance.
 This method uses the getParent method from the Tag and/or SimpleTag
 interfaces.  This method is used for coordination among 
 cooperating tags.

 <p> For every instance of TagAdapter
 encountered while traversing the ancestors, the tag handler returned by
 <tt>TagAdapter.getAdaptee()</tt> - instead of the TagAdpater itself -
 is compared to <tt>klass</tt>. If the tag handler matches, it - and
 not its TagAdapter - is returned.

 <p>
 The current version of the specification only provides one formal
 way of indicating the observable type of a tag handler: its
 tag handler implementation class, described in the tag-class
 subelement of the tag element.  This is extended in an
 informal manner by allowing the tag library author to
 indicate in the description subelement an observable type.
 The type should be a subtype of the tag handler implementation
 class or void.
 This addititional constraint can be exploited by a
 specialized container that knows about that specific tag library,
 as in the case of the JSP standard tag library.

 <p>
 When a tag library author provides information on the
 observable type of a tag handler, client programmatic code
 should adhere to that constraint.  Specifically, the Class
 passed to findAncestorWithClass should be a subtype of the
 observable type.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>from</CODE> - The instance from where to start looking.<DD><CODE>klass</CODE> - The subclass of JspTag or interface to be matched
<DT><B>Returns:</B><DD>the nearest ancestor that implements the interface
 or is an instance of the class specified</DL>
</DD>
</DL>
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