基类 UUID

package com.guohuai.cms.component.persist;

import java.io.Serializable;

import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.MappedSuperclass;

import org.hibernate.annotations.GenericGenerator;

//JPA 基类的标识
@MappedSuperclass
public abstract class UUID implements Serializable {

/**
*
*/
private static final long serialVersionUID = -8010393090467301651L;
@Id
@GenericGenerator(name = "uuid", strategy = "uuid.hex")
@GeneratedValue(strategy = GenerationType.AUTO, generator = "uuid")
protected String oid;

public String getOid() {
return oid;
}

public void setOid(String oid) {
this.oid = oid;
}

@Override
public int hashCode() {
return null == this.oid ? "".hashCode() : this.oid.hashCode();
}

@Override
public String toString() {
return null == this.oid ? "" : this.oid;
}

@Override
public boolean equals(Object obj) {
if (null == obj) {
return false;
}
if (!(obj instanceof UUID)) {
return false;

}
UUID ref = (UUID) obj;
return null == this.oid ? null == ref.getOid() : this.oid.equals(ref.getOid());

}

}