Hello,
Suppose you have a text file like:
my_setting = ON
some_method = METHOD_A
verbosity = DEBUG
...
That you wish to to update a corresponding object accordingly:
Setting my_setting = ON;
Method some_method = METHOD_A;
Verbosity verbosity = DEBUG;
...
Where all are different kind of enums.
I would like to have a generic way to instanciate the enum values. That is, at runtime using reflection, and without knowing the enum types of the object in advance.
I would have imagined something like this:
for (ConfigLine line : lines)
{
String[] tokens = line.string.split("=", 2);
String name = tokens[0].trim();
String value = tokens[1].trim();
try
{
Field field = this.getClass().getDeclaredField(name);
if(field.getType().isEnum())
{
// doesn't work (cannot convert String to enum)
field.set(this, value);
// invalid code (some strange generics issue)
field.set(this, Enum.valueOf(field.getType().getClass(), value));
}
else
{ /*...*/ }
}
catch //...
}
The question is: what should there be instead? Is it even possible to instanciate an unknown enum given its String representation?