For the input like below, I would like to invoke it's respective setter method. For example Input:
name | age
abc | 32
bac | 43
The above input will be stored under "List<Map<String, String>>" and I should be able to find setName for "name" and setAge for "age" and assign "abc" to setName and 32 to setAge. Both setName and setAge is declared in a Java file.
I have explored BeanUtils and Reflection API yet trying to find a solution.
Kindly share your opinion to achieve my requirement
If your List is populated like:
Map<String, String> m = new HashMap<>();
m.put("age","32");
m.put("name","abc");
list.add(m);
With reflection your code should be something like:
List<YourObject> resultList = new ArrayList<>(); // or List<Object>
for(Map<String, String> map: list){
YourObject obj = new YourObject();// or Object obj = Class.forName("package.YourObject").newInstance();
for(String key: map.keySet()) {
String method = "set" + key.substring(0,1).toUpperCase() + key.substring(1);
obj.getClass().getDeclaredMethod(method, String.class).invoke(obj, map.get(key));
}
resultList.add(obj);
}
Super easy to do with Reflection, if that is what you are looking for:
An object with a setter:
public class ObjWithSetters {
private static final PrintStream out = System.out;
public void setName(String name) {
out.println("Setting the name: " + name);
}
}
And here is how to search it:
public class FindSetter {
private static final Logger LOG = Logger.getLogger(FindSetter.class.getName());
public static void main(String[] args) throws Exception {
final Object myObject = new ObjWithSetters();
final Method[] methods = myObject.getClass().getMethods();
for(Method m : methods) {
if(m.getName().equals("setName")) {
m.invoke(myObject, "My name is Bob");
} else {
LOG.info("I found this method: " + m.getName() + " but it is not the setter I want");
}
}
}
}
