?? parent.java
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//$Id: Parent.java,v 1.2 2004/12/05 21:30:17 epbernard Exp $package org.hibernate.test.metadata.manytoone;import javax.ejb.Entity;import javax.ejb.AccessType;import javax.ejb.Id;import java.io.Serializable;/** * @author Emmanuel Bernard */@Entity(access = AccessType.FIELD)public class Parent implements Serializable { @Id public ParentPk id; public int age; public int hashCode() { //a NPE can occurs, but I don't expect hashcode to be used before pk is set return id.hashCode(); } public boolean equals(Object obj) { //a NPE can occurs, but I don't expect equals to be used before pk is set if (obj != null && obj instanceof Parent) { return id.equals( ( (Parent) obj).id ); } else { return false; } }}
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