Call method from child class stored in property

Question

I'm creating a validation class for my project. At the moment I'm stuck on the point that I want to invoke a method (in this case getText()) from a class that is being passed via a generic type.

Here are the codes:

In this class I created a getRules where I pass a HashMap where the key is the name of the field, and the value in the rules attached to it.

public class PlayerValidator extends FormValidator<PlayerFormPanel> {
  @Override
  protected HashMap<String, String> getRules() {
    HashMap<String, String> rules = new HashMap<>();
    rules.put("firstNameField", "required");

    return rules;
  }
}

Next I got a parent class where I got a validate method, which will iterate over the rules and check if the rule is valid or invalid.

abstract class FormValidator<T> {

  abstract HashMap<String, String> getRules();

  public void validate(T form) {
    System.out.println(form.toString());

    for (Map.Entry<String, String> field : getRules().entrySet()) {
        System.out.println(field.getKey());
        System.out.println(field.getValue());
    }
  }
}

In the generic type T I get the PlayerFormPanel object, but how would I be able to call the getText() method on the firstNameField (field.getKey())?

`field.getKey()` returns a String: it doesn't have a `getText()` method. — jaco0646, Oct 24 '14 at 01:15
In the getKey(), there will be the `TextField` object of `firstNameField`. So it should have the `getText()` method. — guidsen, Oct 24 '14 at 01:36

score 0 · Answer 1 · edited May 23 '17 at 11:57

0

You should use Introspector or Reflection

for(PropertyDescriptor prop : Introspector.getBeanInfo(class).getPropertyDescriptors()){
  System.out.println(prop.getReadMethod());
}

Possible duplicate of this question: Java Reflection: How can i get the all getter methods of a java class and invoke them

edited May 23 '17 at 11:57

Community

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answered Oct 23 '14 at 23:14

Henrique Goulart

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Call method from child class stored in property

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