Spring boot: Read json file and convert it to pojo[part2]

[@ukaszt5026]

Hey, How to import Item? i tried copy yours import, but it does not work and how to refecator this last line to universal method?

[@cellonlush5583]

Hi, Item is just my pojo. It could be any Object.

[@cellonlush5583]

package com.my.guitarstore.model; import com.fasterxml.jackson.annotation.JsonCreator; import com.fasterxml.jackson.annotation.JsonInclude; import com.fasterxml.jackson.annotation.JsonValue; import io.swagger.annotations.ApiModel; import io.swagger.annotations.ApiModelProperty; import lombok.Data; import org.springframework.util.ObjectUtils; import javax.persistence.*; import javax.validation.constraints.NotNull; import java.util.stream.Stream; @Entity(name = "items") @Data @ApiModel(value = "Item", description = "The item object that contains the details pertaining to an item") public class Item { public enum ItemState { NEW("New"), USED("Used"); public final String value; ItemState(String value) { this.value = value; } @JsonCreator public static ItemState convert(final String itemState) { ItemState inputItemState = Stream.of(ItemState.values()).filter(targetEnum -> targetEnum.value.equals(itemState)) .findFirst().orElse(null); if(ObjectUtils.isEmpty(inputItemState)) throw new IllegalArgumentException("Invalid value for ItemState"); return inputItemState; } @JsonValue public String getValue() {return value;} } @ApiModelProperty(name = "itemId", value = "Unique identifier for the item") @JsonInclude(JsonInclude.Include.NON_EMPTY) @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Long itemId; @ApiModelProperty(name = "name", value = "Item name") @JsonInclude(JsonInclude.Include.NON_EMPTY) @NotNull private String name; @ApiModelProperty(name = "regularPrice", value = "regular price") @JsonInclude(JsonInclude.Include.NON_EMPTY) @NotNull private Double regularPrice; //columnDefinition = "boolean default false", @ApiModelProperty(name = "couponApplicable", value = "Indicate whether coupon is applicable or not on the item") @JsonInclude(JsonInclude.Include.NON_EMPTY) @Column( name = "couponApplicable") private Boolean couponApplicable; @ApiModelProperty(name = "sale discount", value = "Percentage of sale discount") @JsonInclude(JsonInclude.Include.NON_EMPTY) @Transient private Discount discount; @ApiModelProperty(name = "itemState", value = "Indicate whether the item is used or new", example = "New") @JsonInclude(JsonInclude.Include.NON_EMPTY) @NotNull @Column(name = "itemState") @Enumerated(EnumType.STRING) private ItemState itemState; @ApiModelProperty(name = "amount", value = "The number of Item", example = "1") @JsonInclude(JsonInclude.Include.NON_EMPTY) @NotNull private Integer amount; }