taglibs-rdc-examples/src/main/java/org/apache/taglibs/rdc/sampleapps/mortgage/struts/MortgageAction.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;
import org.apache.taglibs.rdc.MortgageData;

/**
 * Struts action class for mortgage data collection (mortgage sample app)
 *
 * @author Rahul
 */
public class MortgageAction 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();
        MortgageBean formBean = (MortgageBean) form;

        MortgageData mortgage = null;
        String monthlyInstallment = null;
        String propertyValueStr = ((MortgageAppBean)request.getSession().
            getAttribute("appBean")).getPropertyValue();
        double propertyValue = 0;
        int downpayPercent = 0;

        try {

            propertyValue = Double.parseDouble(propertyValueStr.trim());
            mortgage = formBean.getMortgage();
            String downpayPercentStr = mortgage.getPercent();
            downpayPercentStr = downpayPercentStr.replaceAll(" ", "");
            downpayPercent = Integer.parseInt(downpayPercentStr);
            monthlyInstallment = getMortgagePayment(mortgage,
                propertyValue);

        } catch (Exception e) {
            errors.add("MortgageAction", new ActionMessage(e.getMessage()));
        }

        if (propertyValue == 0) {
            errors.add("MortgageAction", new ActionMessage("Zero propertyValue"));
        }
        if (downpayPercent == 0) {
            errors.add("MortgageAction", new ActionMessage("Zero downpayPercent"));
        }

        double downPayment = propertyValue * downpayPercent / 100;
        // Truncate cents for better TTS result ... won't work if downPayment > 10^7
        String downPaymentStr = "" + downPayment;
        if (downPaymentStr.indexOf('.') != -1) {
            downPaymentStr = downPaymentStr.substring(0,
                downPaymentStr.indexOf('.'));
        }

        // 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 ( formBean.getMortgage() != null ){
            ((MortgageAppBean)request.getSession().getAttribute("appBean")).
                setDownPayment(downPaymentStr);
            request.setAttribute("monthlyInstallment", monthlyInstallment);
            forward = mapping.findForward("ok");
        } else {
            forward = mapping.findForward("redo");
        }

        // Finish with
        return (forward);

    }

    /**
     * Get the monthly installment for the given mortgage
     *
     * @param mortgage the mortgage data
     * @param amount the property value
     * @return String the monthly installment returned as a string
     */
    private String getMortgagePayment(MortgageData mortgage, double amount) {
        // Access back-end for rate lookup
        return "1279";
    }

}