one to many via join table

Part.java

@Entity
@Table(name="PRODUCT")
public class Product {

	@Id
	private String serialNumber;
	
	@OneToMany
	@JoinTable(name="PRODUCT_PARTS", joinColumns=@JoinColumn(name="PRODUCT_ID"), inverseJoinColumns=@JoinColumn(name="PART_ID"))
	private Set<Part> parts = new HashSet<Part>();
	
	
	public String getSerialNumber() {
		return serialNumber;
	}
	public void setSerialNumber(String serialNumber) {
		this.serialNumber = serialNumber;
	}
	public Set<Part> getParts() {
		return parts;
	}
	public void setParts(Set<Part> parts) {
		this.parts = parts;
	}
}

Product.java

@Entity
@Table(name="PRODUCT")
public class Product {

	@Id
	private String serialNumber;
	
	@OneToMany
	@JoinTable(name="PRODUCT_PARTS", joinColumns=@JoinColumn(name="PRODUCT_ID"), inverseJoinColumns=@JoinColumn(name="PART_ID"))
	private Set<Part> parts = new HashSet<Part>();
	
	
	public String getSerialNumber() {
		return serialNumber;
	}
	public void setSerialNumber(String serialNumber) {
		this.serialNumber = serialNumber;
	}
	public Set<Part> getParts() {
		return parts;
	}
	public void setParts(Set<Part> parts) {
		this.parts = parts;
	}
}

PRODUCT_PARTS.sql

CREATE TABLE `PRODUCT_PARTS` (
  `PRODUCT_ID` varchar(255) NOT NULL,
  `PART_ID` bigint(20) NOT NULL,
  PRIMARY KEY (`PRODUCT_ID`,`PART_ID`),
  UNIQUE KEY `PART_ID` (`PART_ID`),
  KEY `FK42C3C7507B2D661E` (`PRODUCT_ID`),
  KEY `FK42C3C75071CA5096` (`PART_ID`),
  CONSTRAINT `FK42C3C75071CA5096` FOREIGN KEY (`PART_ID`) REFERENCES `Part` (`id`),
  CONSTRAINT `FK42C3C7507B2D661E` FOREIGN KEY (`PRODUCT_ID`) REFERENCES `PRODUCT` (`serialNumber`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;