FindOwnersForm.java

/*
 * Copyright 2004-2009 the original author or authors.
 * 
 * Licensed 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.compass.sample.petclinic.web;

import java.util.Collection;

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

import org.compass.sample.petclinic.Owner;
import org.springframework.validation.BindException;
import org.springframework.web.servlet.ModelAndView;

/**
 * JavaBean Form controller that is used to search for <code>Owner</code>s by
 * last name.
 * 
 * @author Ken Krebs
 */
public class FindOwnersForm extends AbstractClinicForm {

    private String selectView;

    /** Creates a new instance of FindOwnersForm */
    public FindOwnersForm() {
        // OK to start with a blank command object
        setCommandClass(Owner.class);
    }

    /**
     * Set the name of the view that should be used for selection display.
     */
    public void setSelectView(String selectView) {
        this.selectView = selectView;
    }

    protected void initApplicationContext() {
        super.initApplicationContext();
        if (this.selectView == null) {
            throw new IllegalArgumentException("selectView isn't set");
        }
    }

    /**
     * Method used to search for owners renders View depending on how many are
     * found
     */
    protected ModelAndView onSubmit(HttpServletRequest request, HttpServletResponse response, Object command,
            BindException errors) throws Exception {
        Owner owner = (Owner) command;
        // find owners by last name
        Collection results = getClinic().findOwners(owner.getLastName());
        if (results.size() < 1) {
            // no owners found
            errors.rejectValue("lastName", "notFound", null, "not found");
            return showForm(request, response, errors);
        }

        if (results.size() > 1) {
            // multiple owners found
            return new ModelAndView(this.selectView, "selections", results);
        }

        // 1 owner found
        owner = (Owner) results.iterator().next();
        return new ModelAndView(getSuccessView(), "ownerId", owner.getId());
    }
}