package de.bvb.test3;

/**

 * 建造者模式: 假如一个类有4个字段,每个字段或者每几个字段的组合都需要设置为构造函数,构造函数就比较麻烦

 * 而且如果再加一个字段进去也不好拓展.

 * 就需要使用到建造者模式了

 *

 * 实例: android中的dialog, okHttp以及Retrofit

 *

 * 调用代码:

 * Person p1 = new Person.Builder().setId("0").setName("name").build();

 * Person p2 = new Person.Builder().setSalary(11).build();

 *

 */

public class Person {

    private String id;

    private String name;

    private int age;

    private double salary;

    public Person(Builder builder) {

        this.id = builder.id;

        this.name = builder.name;

        this.age = builder.age;

        this.salary = builder.salary;

    }

    public static class Builder {

        private String id;

        private String name;

        private int age;

        private double salary;

        public Person build() {

            return new Person(this);

        }

        public Builder setId(String id) {

            this.id = id;

            return this;

        }

        public Builder setName(String name) {

            this.name = name;

            return this;

        }

        public Builder setAge(int age) {

            this.age = age;

            return this;

        }

        public Builder setSalary(double salary) {

            this.salary = salary;

            return this;

        }

    }

    public String getId() {

        return id;

    }

    public void setId(String id) {

        this.id = id;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public int getAge() {

        return age;

    }

    public void setAge(int age) {

        this.age = age;

    }

    public double getSalary() {

        return salary;

    }

    public void setSalary(double salary) {

        this.salary = salary;

    }

}