| /* |
| * Copyright (c) 2013, 2018 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0, which is available at |
| * http://www.eclipse.org/legal/epl-2.0. |
| * |
| * This Source Code may also be made available under the following Secondary |
| * Licenses when the conditions for such availability set forth in the |
| * Eclipse Public License v. 2.0 are satisfied: GNU General Public License, |
| * version 2 with the GNU Classpath Exception, which is available at |
| * https://www.gnu.org/software/classpath/license.html. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 |
| */ |
| |
| package mypack; |
| |
| import java.io.IOException; |
| import java.io.StringWriter; |
| import jakarta.servlet.jsp.JspWriter; |
| import jakarta.servlet.jsp.JspException; |
| import jakarta.servlet.jsp.tagext.SimpleTagSupport; |
| import jakarta.servlet.jsp.PageContext; |
| import jakarta.servlet.jsp.tagext.JspFragment; |
| import jakarta.annotation.PostConstruct; |
| import jakarta.annotation.PreDestroy; |
| |
| |
| public class MySimpleTag extends SimpleTagSupport { |
| |
| private boolean pConstructed = false; |
| private PageContext pageContext; |
| |
| public void doTag() { |
| |
| this.pageContext = (PageContext) getJspContext(); |
| if (pConstructed) { |
| pageContext.setAttribute("InjectMessage", "==PostConstruct=="); |
| } |
| JspWriter out = pageContext.getOut(); |
| StringWriter sw = new StringWriter(); |
| try { |
| JspFragment body = getJspBody(); |
| body.invoke(sw); |
| out.println(sw.toString()); |
| } catch (IOException | JspException e) { |
| e.printStackTrace(); |
| } |
| } |
| |
| @PostConstruct |
| public void myPostConstruct () { |
| pConstructed = true; |
| } |
| |
| @PreDestroy |
| public void myPreDestroy () { |
| pageContext.setAttribute("InjectMessage", "==PreDestroy=="); |
| } |
| } |
| |