AbstractClinicForm


1   package org.springframework.samples.petclinic.web;
2   
3   import java.text.SimpleDateFormat  ;
4   import java.util.Date  ;
5   
6   import javax.servlet.http.HttpServletRequest  ;
7   import javax.servlet.http.HttpServletResponse  ;
8   
9   import org.springframework.beans.propertyeditors.CustomDateEditor;
10  import org.springframework.samples.petclinic.Clinic;
11  import org.springframework.validation.BindException;
12  import org.springframework.web.bind.ServletRequestDataBinder;
13  import org.springframework.web.servlet.ModelAndView;
14  import org.springframework.web.servlet.mvc.SimpleFormController;
15  
16  /**
17   * JavaBean abstract base class for petclinic-aware form controllers.
18   * Provides convenience methods for subclasses.
19   *
20   * @author Ken Krebs
21   */
22  public abstract class AbstractClinicForm extends SimpleFormController {
23  
24      private Clinic clinic;
25  
26      public void setClinic(Clinic clinic) {
27          this.clinic = clinic;
28      }
29  
30      protected Clinic getClinic() {
31          return clinic;
32      }
33  
34      public void afterPropertiesSet() {
35          if (this.clinic == null) {
36              throw new IllegalArgumentException  ("'clinic' is required");
37          }
38      }
39  
40      /**
41       * Set up a custom property editor for the application's date format.
42       */
43      protected void initBinder(HttpServletRequest   request, ServletRequestDataBinder binder) {
44          SimpleDateFormat   dateFormat = new SimpleDateFormat  ("yyyy-MM-dd");
45          dateFormat.setLenient(false);
46          binder.registerCustomEditor(Date  .class, new CustomDateEditor(dateFormat, false));
47      }
48  
49      /**
50       * Method disallows duplicate form submission.
51       * Typically used to prevent duplicate insertion of entities
52       * into the datastore. Shows a new form with an error message.
53       */
54      protected ModelAndView disallowDuplicateFormSubmission(HttpServletRequest   request, HttpServletResponse   response)
55              throws Exception   {
56  
57          BindException errors = getErrorsForNewForm(request);
58          errors.reject("duplicateFormSubmission", "Duplicate form submission");
59          return showForm(request, response, errors);
60      }
61  
62  }
63
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