I've got a bean that reads/writes to the file system. To do that, it's
constructor takes a param for the file path. Very straightforward, however
using this bean has been problematic. I got the "no service implements the
interface String" exception when constructing the bean, which led me to the
FAQ here: http://tapestry.apache.org/beaneditform-faq.html However, things
do not work as advertised in the FAQ.
No matter what I do, Tapestry requires that the bean have a no argument
constructor, and that I annotate that constructor with @Inject. And in the
debugger I see that the parameterized constructor is called twice
from onPrepareFromMyBeanEditor(), after which the no-param constructor is
called.
At the time the page renders, my bean lacks a filepath, I assume because the
last time the constructor was called, it had no parameters.
Summary:
Bean constructors are called multiple times, twice with params and once
without, always resulting in a bean that has been created with no
parameters.
What can I do here? I've included hacked version of the FAQ code with notes.
Best,
George
public class MyBean {
@Inject <------------------------------ without this annotation
on the no-param constructor, Tapestry always throws a "no service ..."
exception
public MyBean() { ... }
public MyBean(String filePath) { ... }
}
public class MyPage {
@Property
public MyBean myBean; <--------------- the example code declares this as
public, but Tapestry throws an exception, insisting it be made private...is
this possibly related to the problem I'm seeing?
void onPrepareFromMyBeanEditor() {
myBean = new MyBean(getFilePath()); <------------------- I need a param
to point to the file, but can't seem to hang on to the bean that is
instantiated here
}
}
