taglibs-rdc/src/main/java/org/apache/taglibs/rdc/sampleapps/mortgage/struts/LoginAction.java

/*
 * 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.taglibs.rdc.sampleapps.mortgage.struts;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
import org.apache.taglibs.rdc.sampleapps.mortgage.MortgageAppBean;

/**
 * Struts action class for login (mortgage sample app)
 *
 * @author Rahul
 *
 */
public class LoginAction extends Action {

    /**
     * Process the specified HTTP request, and create the corresponding
     * HTTP response (or forward to another web component that will create it),
     * with provision for handling exceptions thrown by the business logic.
     */
    public ActionForward execute(
        ActionMapping mapping,
        ActionForm form,
        HttpServletRequest request,
        HttpServletResponse response)
        throws Exception {

        ActionMessages errors = new ActionMessages();
        ActionForward forward = new ActionForward();
        LoginBean formBean = (LoginBean) form;

        boolean loginSuccess = false;
        String mlsPropertyValue = null;
        try {

            // Plug for back-end access to login validation
            // Add appropriate arguments
            loginSuccess = validateLogin(formBean.getMemberNumber());
            if ( loginSuccess ) {
                mlsPropertyValue = getMLSPropertyValue(formBean.getMlsNumber());
            }

        } catch (Exception e) {

            errors.add("LoginAction", new ActionMessage(e.getClass().getName()));

        }

        // If a message is required, save the specified key(s)
        // into the request for use by the <struts:errors> tag.
        if (!errors.isEmpty()) {
            saveErrors(request, errors);
        }

        // Write logic determining how the user should be forwarded.
        if ( loginSuccess ) {
            ((MortgageAppBean)request.getSession().getAttribute("appBean")).
                setMemberNumber(formBean.getMemberNumber());
            ((MortgageAppBean)request.getSession().getAttribute("appBean")).
                setMlsNumber(formBean.getMlsNumber());
            ((MortgageAppBean)request.getSession().getAttribute("appBean")).
                setPropertyValue(mlsPropertyValue);
            request.setAttribute("mlsNumber", formBean.getMlsNumber());
            request.setAttribute("mlsPropertyValue", mlsPropertyValue);
            forward = mapping.findForward("mortgage");
        } else {
            forward = mapping.findForward("re-login");
        }

        // Finish with
        return (forward);

    }

    /**
     * Validate the memberNumber supplied
     *
     * @param memberNum the member number
     * @return boolean indicating login success of failure
     */
    private boolean validateLogin(String memberNum) {
        // Access back-end for login validation, return false if login fails
        return true;
    }

    /**
     * Obtain the property value for the property with the given
     * MLS number
     *
     * @param mlsNum the M.L.S. number for the property
     * @return String the property value returned as a string
     */
    private String getMLSPropertyValue(String mlsNum) {
        // Access back-end for
        return "250000";
    }

}