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Jetty example source code file (JspFragment.java)
The Jetty JspFragment.java source code/** * * Copyright 2003-2004 The Apache Software Foundation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ // // This source code implements specifications defined by the Java // Community Process. In order to remain compliant with the specification // DO NOT add / change / or delete method signatures! // package javax.servlet.jsp.tagext; import java.io.IOException; import java.io.Writer; import javax.servlet.jsp.JspContext; import javax.servlet.jsp.JspException; /** * Encapsulates a portion of JSP code in an object that * can be invoked as many times as needed. JSP Fragments are defined * using JSP syntax as the body of a tag for an invocation to a SimpleTag * handler, or as the body of a <jsp:attribute> standard action * specifying the value of an attribute that is declared as a fragment, * or to be of type JspFragment in the TLD. * <p> * The definition of the JSP fragment must only contain template * text and JSP action elements. In other words, it must not contain * scriptlets or scriptlet expressions. At translation time, the * container generates an implementation of the JspFragment abstract class * capable of executing the defined fragment. * <p> * A tag handler can invoke the fragment zero or more times, or * pass it along to other tags, before returning. To communicate values * to/from a JSP fragment, tag handlers store/retrieve values in * the JspContext associated with the fragment. * <p> * Note that tag library developers and page authors should not generate * JspFragment implementations manually. * <p> * <i>Implementation Note: It is not necessary to generate a * separate class for each fragment. One possible implementation is * to generate a single helper class for each page that implements * JspFragment. Upon construction, a discriminator can be passed to * select which fragment that instance will execute. * * @since 2.0 */ public abstract class JspFragment { /** * Executes the fragment and directs all output to the given Writer, * or the JspWriter returned by the getOut() method of the JspContext * associated with the fragment if out is null. * * @param out The Writer to output the fragment to, or null if * output should be sent to JspContext.getOut(). * @throws javax.servlet.jsp.JspException Thrown if an error occured * while invoking this fragment. * @throws javax.servlet.jsp.SkipPageException Thrown if the page * that (either directly or indirectly) invoked the tag handler that * invoked this fragment is to cease evaluation. The container * must throw this exception if a Classic Tag EventHandler returned * Tag.SKIP_PAGE or if a Simple Tag EventHandler threw SkipPageException. * @throws java.io.IOException If there was an error writing to the * stream. */ public abstract void invoke( Writer out ) throws JspException, IOException; /** * Returns the JspContext that is bound to this JspFragment. * * @return The JspContext used by this fragment at invocation time. */ public abstract JspContext getJspContext(); } Other Jetty examples (source code examples)Here is a short list of links related to this Jetty JspFragment.java source code file: |
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