alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Struts example source code file (Anchor.java)

This example Struts source code file (Anchor.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Struts tags/keywords

anchor, anchor, comma, http, open_template, open_template, override, request, response, servlet, string, string, strutstag, strutstagskipinheritance, template, template, url, xmlhttprequest

The Struts Anchor.java source code

/*
 * $Id: Anchor.java 651946 2008-04-27 13:41:38Z apetrelli $
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

package org.apache.struts2.dojo.components;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts2.views.annotations.StrutsTag;
import org.apache.struts2.views.annotations.StrutsTagAttribute;
import org.apache.struts2.views.annotations.StrutsTagSkipInheritance;

import com.opensymphony.xwork2.util.ValueStack;

/**
 * <!-- START SNIPPET: javadoc -->
 * <p>
 * A tag that creates an HTML <a/> element, that when clicked makes an asynchronous request(XMLHttpRequest). The url
 * attribute must be build using the <s:url/> tag. 
 * </p>
 * <!-- END SNIPPET: javadoc -->
 * <p>Examples

* * <!-- START SNIPPET: example1 --> * <div id="div1">Div 1</div> * <s:url id="ajaxTest" value="/AjaxTest.action"/> * * <sx:a id="link1" href="%{ajaxTest}" target="div1"> * Update Content * </sx:a> * <!-- END SNIPPET: example1 --> * * <!-- START SNIPPET: example2 --> * <s:form id="form" action="AjaxTest"> * <input type="textbox" name="data"> * <sx:a>Submit form</sx:a> * </s:form> * <!-- END SNIPPET: example2 --> * * <!-- START SNIPPET: example3 --> * <s:form id="form" action="AjaxTest"> * <input type="textbox" name="data"> * </s:form> * * <sx:a formId="form">Submit form</sx:a> * <!-- END SNIPPET: example3 --> * * <!-- START SNIPPET: example4 --> * <script type="text/javascript"> * dojo.event.topic.subscribe("/before", function(event, widget){ * alert('inside a topic event. before request'); * //event: set event.cancel = true, to cancel request * //widget: widget that published the topic * }); * </script> * * <sx:a beforeNotifyTopics="/before">Publish topics</sx:a> * <!-- END SNIPPET: example4 --> * * <!-- START SNIPPET: example5 --> * <script type="text/javascript"> * dojo.event.topic.subscribe("/after", function(data, request, widget){ * alert('inside a topic event. after request'); * //data : text returned from request(the html) * //request: XMLHttpRequest object * //widget: widget that published the topic * }); * </script> * * <sx:a afterNotifyTopics="/after" highlightColor="red" href="%{#ajaxTest}">Publish topics</sx:a> * <!-- END SNIPPET: example5 --> * * <!-- START SNIPPET: example6 --> * <script type="text/javascript"> * dojo.event.topic.subscribe("/error", function(error, request, widget){ * alert('inside a topic event. on error'); * //error : error object (error.message has the error message) * //request: XMLHttpRequest object * //widget: widget that published the topic * }); * </script> * * <img id="ind1" src="${pageContext.request.contextPath}/images/indicator.gif" style="display:none"/> * <sx:a errorNotifyTopics="/error" indicator="ind1" href="%{#ajaxTest}">Publish topics</sx:a> * <!-- END SNIPPET: example6 --> */ @StrutsTag(name="a", tldTagClass="org.apache.struts2.dojo.views.jsp.ui.AnchorTag", description="Renders an HTML anchor element that when clicked calls a URL via remote XMLHttpRequest and updates " + "its targets content") public class Anchor extends AbstractValidateBean { public static final String OPEN_TEMPLATE = "a"; public static final String TEMPLATE = "a-close"; public static final String COMPONENT_NAME = Anchor.class.getName(); protected String targets; public Anchor(ValueStack stack, HttpServletRequest request, HttpServletResponse response) { super(stack, request, response); } public String getDefaultOpenTemplate() { return OPEN_TEMPLATE; } protected String getDefaultTemplate() { return TEMPLATE; } public void evaluateExtraParams() { super.evaluateExtraParams(); if (targets != null) addParameter("targets", findString(targets)); } @Override @StrutsTagSkipInheritance public void setTheme(String theme) { super.setTheme(theme); } @StrutsTagAttribute(description="Comma delimited list of ids of the elements whose content will be updated") public void setTargets(String targets) { this.targets = targets; } }

Other Struts examples (source code examples)

Here is a short list of links related to this Struts Anchor.java source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.