Hi Everyone. When I try save entity inside simple WebPage like this
everything is ok:
import com.example.entities.Person;
import javax.ejb.EJB;
public class Register extends WebPage{
@EJB
NewSessionBeanLocal beanLocal;
public Register(){
NavomaticBorder navomaticBorder = new
NavomaticBorder("navigationBorder");
RegisterForm form = new RegisterForm("form");
navomaticBorder.add(form);
add(navomaticBorder);
// save entity to database for test
Person person = new Person();
person.setSurname("ABC");
person.setUsername("DEF");
beanLocal.addPerson(person); // IT IS OK
}
}
//************************************************************************************************************************
Html Form:
<html>
<head>
<title>TODO supply a title</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,
initial-scale=1.0">
</head>
<body>
<form wicket:id="form">
Username <input type="text" wicket:id="username"/>
Suername <input type="text" wicket:id="surname"/>
<input value="Save" name="save" type="submit" />
</form>
</body>
</html>
//************************************************************************************************************************
but when i try do this inside Form, becouse I want save entity after click
on Subimt button (register Person):
import com.example.Repository.NewSessionBeanLocal;
import com.example.entities.Person;
import javax.ejb.EJB;
import org.apache.wicket.markup.html.form.Form;
import org.apache.wicket.markup.html.form.TextField;
import org.apache.wicket.model.CompoundPropertyModel;
public class RegisterForm extends Form{
@EJB
NewSessionBeanLocal beanLocal;
Person person = new Person();
public RegisterForm(String id) {
super(id);
CompoundPropertyModel model = new CompoundPropertyModel(person);
this.setModel(model);
this.add(new TextField("username"));
this.add(new TextField("surname"));
}
@Override
public void onSubmit() {
Person p = (Person)this.getModelObject();
System.out.println("TO: : : "+ p.getUsername()+ " "+
p.getSurname()); // shows right data
//Person p = new Person();
//p.setSurname("ABC");
//p.setUsername("DEF");
beanLocal.addPerson(p); // <-- PROBLEM IS HERE
}
}
I have error:
Unexpected RuntimeException:
Last cause: null
WicketMessage: Method onFormSubmitted of interface
org.apache.wicket.markup.html.form.IFormSubmitListener targeted at
[RegisterForm [Component id = form]] on component [RegisterForm [Component
id = form]] threw an exception
Root cause:
java.lang.NullPointerException
at
com.example.navigationBefore.RegisterForm.onSubmit(RegisterForm.java:34)
(...)
Something I'm doing wrong? I Should not save entity inside onSubmit() Form
method? Thank you for any advice.
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