Databases
StackOverflow2013
Postsdbo
POHow to prevent @ModelAttribute to instantiate a calendar in a method
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow to prevent @ModelAttribute to instantiate a calendar in a method
    primarykey
    data
    text
    <p>I have a method in a controller:</p> <pre><code>public FormValidationResult submitFormAndSendEmail(@Valid ContactForm form, BindingResult result, @HttpSessionParam(value = "lastTimeContactFormSent", required = false) Calendar lastTimeContactFormSent) </code></pre> <p>As you can see I have created a @HttpSessionParam annotation, this will take a variable from the HttpSession and put it into the specified method parameter.</p> <p>However...</p> <p>Before the argument is being resolved, I recieve an InstantiationExceptionConstructorAccessorImpl because calendar cannot be instantiated by a default constructor.</p> <p>Using the given stacktrace, I see that the HandlerMethodInvoker within "resolveModelAttribute" is causing the instantiation. </p> <p>How can i prevent this? I don't want an instantiation, I want to use my own WebArgumentResolver in order to fill the method parameter.</p> <p>Any clues?</p> <p>More info: Stacktrace by Spring (3.0.4):</p> <pre><code> java.lang.InstantiationException at sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(InstantiationExceptionConstructorAccessorImpl.java:30) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:126) at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:104) at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.resolveModelAttribute(HandlerMethodInvoker.java:772) at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.resolveHandlerArguments(HandlerMethodInvoker.java:356) at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:171) at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:427) at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:415) </code></pre> <p>I don't see the debugger hit the webargumentresolver.</p> <p>The argument is defined in my application context (xml) as following:</p> <pre><code> &lt;bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"&gt; &lt;property name="customArgumentResolver" ref="sessionParamResolver"/&gt; &lt;/bean&gt; &lt;!-- annotation to resolve httpSession attributes --&gt; &lt;bean id="sessionParamResolver" class="nl.usgpeople.vakgilde.spring.mvc.extensions.SessionParamArgumentResolver"/&gt; </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USStefan Hendriks
    1. USStefan Hendriks
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POHow to prevent @ModelAttribute to instantiate a calendar in a method
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POHow to prevent @ModelAttribute to instantiate a calendar in a method
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POHow to prevent @ModelAttribute to instantiate a calendar in a method
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload