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package com.github.mybatis.entity;

import com.fasterxml.jackson.annotation.JsonIgnore;

import javax.persistence.Id;
import javax.persistence.MappedSuperclass;
import java.io.Serializable;

/**
 * 基类
 * Created by lirui on 2014/10/23.
 */
@MappedSuperclass
public abstract class IdEntity implements Serializable {
  @Id
  protected Long id;

  public Long getId() {
    return id;
  }

  public void setId(Long id) {
    this.id = id;
  }

  @JsonIgnore
  public boolean isNew() {
    return id == null;
  }

  @JsonIgnore
  public boolean isExist() {
    return id != null;
  }

  @Override
  public boolean equals(Object obj) {
    if (null == obj) {
      return false;
    }

    if (this == obj) {
      return true;
    }

    if (!getClass().equals(obj.getClass())) {
      return false;
    }

    IdEntity that = (IdEntity) obj;
    return 0 != this.getId() && this.getId().equals(that.getId());
  }

  @Override
  public int hashCode() {
    int hashCode = 17;
    hashCode += id == null ? 0 : getId() * 31;
    return hashCode;
  }

  @Override
  public String toString() {
    return String.format("%s(id=%s)", this.getClass().getSimpleName(), getId());
  }
}