BeanAccessor.java

package bob.asm;

/**
 * @author Thomas Darimont
 */
public interface BeanAccessor {

	Object getProperty(String name);

	void setProperty(String name, Object value);
}

Person.java

package bob.model;

/**
 * @author Thomas Darimont
 */
public class Person {

	String firstname;
	String lastname;
	int age;

	public String getFirstname() {
		return firstname;
	}

	public void setFirstname(String firstname) {
		this.firstname = firstname;
	}

	public String getLastname() {
		return lastname;
	}

	public void setLastname(String lastname) {
		this.lastname = lastname;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}

	@Override
	public boolean equals(Object o) {
		if (this == o) return true;
		if (o == null || getClass() != o.getClass()) return false;

		Person person = (Person) o;

		if (age != person.age) return false;
		if (firstname != null ? !firstname.equals(person.firstname) : person.firstname != null) return false;
		if (lastname != null ? !lastname.equals(person.lastname) : person.lastname != null) return false;

		return true;
	}

	@Override
	public int hashCode() {
		int result = firstname != null ? firstname.hashCode() : 0;
		result = 31 * result + (lastname != null ? lastname.hashCode() : 0);
		result = 31 * result + age;
		return result;
	}

	@Override
	public String toString() {
		return "Person{" +
				"firstname='" + firstname + '\'' +
				", lastname='" + lastname + '\'' +
				", age=" + age +
				'}';
	}
}

PersonIndyWrapper.java

package bob.asm.exp;

import java.util.function.Consumer;
import java.util.function.Supplier;

import bob.asm.BeanAccessor;
import bob.model.Person;

/**
 * @author Thomas Darimont
 */
public class PersonIndyWrapper implements BeanAccessor {

	private final Consumer<String> firstname_set;
	private final Consumer<String> lastname_set;
	private final Consumer<Integer> age_set;

	private final Supplier<String> firstname_get;
	private final Supplier<String> lastname_get;
	private final Supplier<Integer> age_get;


	public PersonIndyWrapper(Person instance) {

		this.firstname_set = instance::setFirstname;
		this.lastname_set = instance::setLastname;
		this.age_set = instance::setAge;

		this.firstname_get = instance::getFirstname;
		this.lastname_get = instance::getLastname;
		this.age_get = instance::getAge;
	}

	public Object getProperty(String name) {
		switch (name) {
			case "firstname":
				return firstname_get.get();
			case "lastname":
				return lastname_get.get();
			case "age":
				return age_get.get();
			default:
				return null;
		}
	}

	public void setProperty(String name, Object value) {
		switch (name) {
			case "firstname":
				firstname_set.accept((String) value);
				return;
			case "lastname":
				lastname_set.accept((String) value);
				return;
			case "age":
				age_set.accept((Integer) value);
				return;
			default:
				return;
		}
	}
}