Reflection - Embelezator

Cliente.java

public class Cliente {

	private long cpf;
	private long cnpj;
	private String nome;
	private String slogan;

	public String getNome() {
		return nome;
	}

	public void setNome(String nome) {
		this.nome = nome;
	}

	@Gritar
	public String getSlogan() {
		return slogan;
	}

	public void setSlogan(String slogan) {
		this.slogan = slogan;
	}

	@Mask("###.###.###-##")
	public long getCpf() {
		return cpf;
	}

	public void setCpf(long cpf) {
		this.cpf = cpf;
	}

	@Mask("##.###.###/####-##")
	public long getCnpj() {
		return cnpj;
	}

	public void setCnpj(long cnpj) {
		this.cnpj = cnpj;
	}

}

Embelezator.java

import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.text.ParseException;

import javax.swing.text.MaskFormatter;

public class Embelezator {

	public Object get(Object object, String propriedade) throws Exception {
		Method method = 
				object.getClass().getMethod(getNomeMetodo(propriedade));
		
		Object original = method.invoke(object);   //object.nomeDoMetodo()
		
		if (method.isAnnotationPresent(Gritar.class)) {
			return aplicarGritar(original);
		}

		if (method.isAnnotationPresent(Mask.class)) {
			return aplicarMask(method, original);
		}

		return original;
	}

	protected Object aplicarMask(Method method, Object original) throws ParseException {
		Mask maskAnnotation = method.getAnnotation(Mask.class);
		String mascara = maskAnnotation.value();
		
		String s = original.toString();

		MaskFormatter mf = new MaskFormatter(mascara);
		mf.setValueContainsLiteralCharacters(false);
		mf.setPlaceholderCharacter('0');
		
		return mf.valueToString(s);
	}

	protected String aplicarGritar(Object original) {
		return ((String) original).toUpperCase();
	}

	protected String getNomeMetodo(String propriedade) {
		String nomeDoMetodo = "get" + 
				propriedade.substring(0, 1).toUpperCase() +
				propriedade.substring(1, propriedade.length());
		return nomeDoMetodo;
	}

	public String toString(Object object) throws Exception {
		
		String resultado = "";
		
		Field[] campos = object.getClass().getDeclaredFields();
		for (Field field : campos) {
			resultado += get(object, field.getName()) + ", ";
		}
		
		return resultado;
	}

}

EmbezatorTest.java

import static org.junit.Assert.*;

import org.junit.Before;
import org.junit.Test;

public class EmbezatorTest {

	private Embelezator embelezator;
	private 	Cliente cliente;
	private Fornecedor fornecedor;

	
	@Before
	public void init() {
		embelezator = new Embelezator();
		
		cliente = new Cliente();
		cliente.setNome("Ruan");
		cliente.setSlogan("Malakoi");
		cliente.setCpf(12345678901L); //123.456.789-01
		cliente.setCnpj(12345678901234L);//12.345.678/9012-34
		
		fornecedor = new Fornecedor();
		fornecedor.setCEP(12345678);
		fornecedor.setNomeFantasia("Tekfin");
	}


	@Test
	public void semAnotacao() throws Exception {
		assertEquals("Ruan", 
				embelezator.get(cliente, "nome"));
	}
	
	@Test
	public void gritar() throws Exception {
		assertEquals("MALAKOI", 
				embelezator.get(cliente, "slogan"));
	}
	
	@Test
	public void formataMask() throws Exception {
		assertEquals("123.456.789-01", 
				embelezator.get(cliente, "cpf"));
		assertEquals("12.345.678/9012-34", 
				embelezator.get(cliente, "cnpj"));
	}

	@Test
	public void formataMaskMenor() throws Exception {
		cliente.setCpf(12345L); //123.450.000-00
		assertEquals("123.450.000-00", 
				embelezator.get(cliente, "cpf"));
	}
	
	@Test
	public void fornecedor() throws Exception {
		assertEquals("12345-678", 
				embelezator.get(fornecedor, "CEP"));
		assertEquals("TEKFIN", 
				embelezator.get(fornecedor, "nomeFantasia"));
	}
	
	
	@Test
	public void testToString() throws Exception {
		assertEquals("123.456.789-01, 12.345.678/9012-34, Ruan, MALAKOI, ", 
				embelezator.toString(cliente));
		assertEquals("TEKFIN, 12345-678, ", embelezator.toString(fornecedor));
	}
	
	
	
	
	
	
	
	
	
	
	
	
	
}

Fornecedor.java

public class Fornecedor {

	private String nomeFantasia;
	private int CEP;

	@Gritar
	public String getNomeFantasia() {
		return nomeFantasia;
	}

	public void setNomeFantasia(String nomeFantasia) {
		this.nomeFantasia = nomeFantasia;
	}

	@Mask("#####-###")
	public int getCEP() {
		return CEP;
	}

	public void setCEP(int cEP) {
		CEP = cEP;
	}

}

Gritar.java

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface Gritar {

}

Mask.java

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface Mask {

	String value();

}