All Downloads are FREE. Search and download functionalities are using the official Maven repository.

org.apache.taglibs.standard.tag.el.core.RedirectTag Maven / Gradle / Ivy

The newest version!
/*
 * The contents of this file are subject to the terms
 * of the Common Development and Distribution License
 * (the "License").  You may not use this file except
 * in compliance with the License.
 *
 * You can obtain a copy of the license at
 * glassfish/bootstrap/legal/CDDLv1.0.txt or
 * https://glassfish.dev.java.net/public/CDDLv1.0.html.
 * See the License for the specific language governing
 * permissions and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL
 * HEADER in each file and include the License file at
 * glassfish/bootstrap/legal/CDDLv1.0.txt.  If applicable,
 * add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your
 * own identifying information: Portions Copyright [yyyy]
 * [name of copyright owner]
 *
 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
 *
 * Portions Copyright Apache Software Foundation.
 */ 

package org.apache.taglibs.standard.tag.el.core;

import javax.servlet.jsp.JspException;

import org.apache.taglibs.standard.tag.common.core.RedirectSupport;

/**
 * 

A handler for <redirect>, which redirects the browser to a * new URL. * * @author Shawn Bayern */ public class RedirectTag extends RedirectSupport { //********************************************************************* // 'Private' state (implementation details) private String url_; // stores EL-based property private String context_; // stores EL-based property //********************************************************************* // Constructor /** * Constructs a new URLEncodeTag. As with TagSupport, subclasses * should not provide other constructors and are expected to call * the superclass constructor */ public RedirectTag() { super(); init(); } //********************************************************************* // Tag logic // evaluates expression and chains to parent public int doStartTag() throws JspException { // evaluate any expressions we were passed, once per invocation evaluateExpressions(); // chain to the parent implementation return super.doStartTag(); } // Releases any resources we may have (or inherit) public void release() { super.release(); init(); } //********************************************************************* // Accessor methods public void setUrl(String url_) { this.url_ = url_; } public void setContext(String context_) { this.context_ = context_; } //********************************************************************* // Private (utility) methods // (re)initializes state (during release() or construction) private void init() { // null implies "no expression" url_ = context_ = null; } /* Evaluates expressions as necessary */ private void evaluateExpressions() throws JspException { /* * Note: we don't check for type mismatches here; we assume * the expression evaluator will return the expected type * (by virtue of knowledge we give it about what that type is). * A ClassCastException here is truly unexpected, so we let it * propagate up. */ url = (String) ExpressionUtil.evalNotNull( "redirect", "url", url_, String.class, this, pageContext); context = (String) ExpressionUtil.evalNotNull( "redirect", "context", context_, String.class, this, pageContext); } }





© 2015 - 2024 Weber Informatics LLC | Privacy Policy