[SOLVED] How to define dynamic setter and getter using reflection?

How to define dynamic setter and getter using reflection?

I've a list of strings, field names, of a class in a loop from resource bundle. I create an object and then using loop i want to set values for that object. For example, for object

Foo f = new Foo();

with parameter param1, I have string "param1" and I somehow want to concate "set" with it like "set"+"param1" and then apply it on f instance as:

f.setparam1("value");

and same for getter. I know reflection will help but I couldn't manage to do it. Please help. Thanks!

Solution

You can do something like this. You can make this code more generic so that you can use it for looping on fields:

Class aClass = f.getClass();
Class[] paramTypes = new Class[1];
paramTypes[0] = String.class; // get the actual param type

String methodName = "set" + fieldName; // fieldName String
Method m = null;
try {
    m = aClass.getMethod(methodName, paramTypes);
} catch (NoSuchMethodException nsme) {
    nsme.printStackTrace();
}

try {
    String result = (String) m.invoke(f, fieldValue); // field value
    System.out.println(result);
} catch (IllegalAccessException iae) {
    iae.printStackTrace();
} catch (InvocationTargetException ite) {
    ite.printStackTrace();
}