productpk.java

来自「一本关于ＥＪＢ的书」· Java 代码 · 共 41 行

package examples;

import java.io.Serializable;

/**
 * Primary Key class for our 'Product' Container-Managed
 * Entity Bean
 */
public class ProductPK implements java.io.Serializable {

	/*
	 * Note that the primary key fields must be a
	 * subset of the the container-managed Bean fields.
	 * The fields we are marking as container-managed in
	 * our Bean are productID, name, desc, and basePrice.
	 * Therefore our PK fields need to be from that set.
	*/
	public String productID;

	public ProductPK(String productID) {
		this.productID = productID;
	}

	public ProductPK() {
	}

	public String toString() {
		return productID.toString();
	}

	public int hashCode()
	{
	      return productID.hashCode();
	}

	public boolean equals(Object prod)
	{
	      return ((ProductPK)prod).productID.equals(productID);
	}  
}