igor-brishkoski

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Inherited
public @interface MethodInfo {
    String author() default "Igor Brishkoski";
    int revision() default 1;
    String comments();
}

igor-brishkoski

public class MyParentClass {
    public void justaMethod() {
        System.out.println("Parent class method");
    }
}

public class MyChildClass extends MyParentClass {
    @Override
    public void justaMethod() {
        System.out.println("Child class method");

igor-brishkoski

/**
 * @deprecated
 * reason for why it was deprecated
 */
@Deprecated
public void anyMethodHere(){
    // Do something
}

igor-brishkoski

@SuppressWarnings("deprecation")
    void myMethod() {
        myObject.deprecatedMethod();
}

igor-brishkoski

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Inherited
public @interface MethodInfo {
    String author() default "Igor Brishkoski";
    int revision() default 1;
    String comments();
}

igor-brishkoski

@MethodInfo(author = "John Snow", revision = 2, comments = "Hey!")
public void awesomeMethod() {   
    Method method = getClass().getMethod("awesomeMethod");
    MethodInfo methodInfo = method.getAnnotation(MethodInfo.class);

    Log.d("MethodInfo", methodInfo.author());
    Log.d("MethodInfo", methodInfo.revision());
    Log.d("MethodInfo", methodInfo.comments());
}

igor-brishkoski

//AwesomeApp
class User {
    String firstName;
    String lastName;
    String city;
}
...
public class MainActivity extends AppCompatActivity {

    @Override

igor-brishkoski

//our app build.gradle file
dependencies {
    ...

    provided project(':annotation')
    ...
}

igor-brishkoski

// annotation module
package com.example.annotation;
@Target(ElementType.TYPE) //class level
@Retention(RetentionPolicy.SOURCE) //we only need it at compile time
public @interface AwesomeLogger {}

igor-brishkoski

@AwesomeLogger
public class User {
    String firstName;
    String lastName;
    String city;
}