Hi Alvin,
Alvin Townsend wrote:
java.lang.IllegalArgumentException: wrong number of arguments
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at
net.sf.click.util.ContainerUtils.ensureObjectPathNotNull(ContainerUtils.java:592)
at
net.sf.click.util.ContainerUtils.copyContainerToObject(ContainerUtils.java:318)
at
net.sf.click.util.ContainerUtils.copyContainerToObject(ContainerUtils.java:355)
at net.sf.click.control.Form.copyTo(Form.java:1710)
This normally happens when an object is instantiated which does not have
a default empty constructor.
When you specify a path for your field e.g. new
TextField("address.price"), Form.copyTo will navigate the
object graph according to the path. Say you have the following:
field = new TextField("address.price")
...
form.copyTo(client);
the copy logic will try and navigate to the Address from Client. But if
Address is null on Client Click
attempts to create a new Address. But the only way this works is if
Address has a default no arg constructor:
public class Address {
public Address() {}
}
If your Address cannot have a no-arg constructor the best way to resolve
this is to ensure your domain
objects are valid before invoking form.copyTo(). You could do this by
overriding Form.copyTo:
public void onInit() {
...
form.copyTo(client) {
if (client.getAddress() == null) {
client.setAddress(createAddress());
}
super.copyTo(client);
};
}
Does this help?
kind regards
bob
