Struts example source code file (URLBean.java)

This example Struts source code file (URLBean.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

hashmap, hashmap, http, httpservletrequest, httpservletresponse, map, map, object, request, response, servlet, string, string, urlbean, urlbean, util

The Struts URLBean.java source code

/*
 * $Id: URLBean.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.util;

import java.util.HashMap;
import java.util.Map;

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

import org.apache.struts2.views.util.UrlHelper;


/**
 * A bean that can generate a URL.
 *
 */
public class URLBean {

    HashMap params;
    HttpServletRequest request;
    HttpServletResponse response;
    String page;


    public URLBean setPage(String page) {
        this.page = page;
        return this;
    }

    public void setRequest(HttpServletRequest request) {
        this.request = request;
    }

    public void setResponse(HttpServletResponse response) {
        this.response = response;
    }

    public String getURL() {
        // all this trickier with maps is to reduce the number of objects created
        Map fullParams = null;

        if (params != null) {
            fullParams = new HashMap();
        }

        if (page == null) {
            // No particular page requested, so go to "same page"
            // Add query params to parameters
            if (fullParams != null) {
                fullParams.putAll(request.getParameterMap());
            } else {
                fullParams = request.getParameterMap();
            }
        }

        // added parameters override, just like in URLTag
        if (params != null) {
            fullParams.putAll(params);
        }

        return UrlHelper.buildUrl(page, request, response, fullParams);
    }

    public URLBean addParameter(String name, Object value) {
        if (params == null) {
            params = new HashMap();
        }

        if (value == null) {
            params.remove(name);
        } else {
            params.put(name, value.toString());
        }

        return this;
    }

    public String toString() {
        return getURL();
    }
}