I have a table

Table ItemLink
- long itemLinkId (PK)
- varchar itemType (TOY, FURNITURE, CLOTHING)
- long itemId


I have three tables

Table Furniture
- long itemId
- ....

Table Clothing
- long itemId

Table Toy
- long itemId

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So I created a class
Class ItemLink
private Long itemLinkId;
private String itemType;
private Item item


Interface Item
private getItemId()
private setItemId()

Class Funiture implements Item
private Long itemId

Class Toy implements Item
private Long itemId

Class Clothing implements Item
private Long itemId

how would i map the ItemLink class to the ItemLink table ???