这些是我的对象:
@XmlRootElement
@XmlAccessorType(XmlAccessType.NONE)
public abstract class AdtagEntity extends GenericEntity implements Serializable {
private static final long serialVersionUID = -6624915864457400750L;
@Id
@XmlElement
protected ObjectId id;
@XmlElement
protected Date createdDate;
@XmlElement
@Indexed
protected Date modifiedDate;
@XmlElement
protected boolean deleted;
public ObjectId getId() {
return id;
}
....
}
和 :
@Entity
@XmlRootElement(name = "offerAdvantage")
public class OfferAdvantage extends AdtagEntity implements Serializable {
private static final long serialVersionUID = 1L;
@XmlElement
@NotNull
private Date beginDateValidity;
...
}
这是集合 OfferAdvantage 的内容:
myset:PRIMARY> db.OfferAdvantage.findOne()
{
"_id" : ObjectId("502533ddc131e6beb0b07cae"),
"company" : "pio",
"version" : 666,
"createdDate" : ISODate("2012-08-10T16:16:29.106Z"),
"modifiedDate" : ISODate("2012-08-10T16:16:29.106Z"),
"deleted" : false,
"beginDateValidity" : ISODate("2012-08-03T13:20:00Z"),
"endDateValidity" : ISODate("2015-10-04T23:06:40Z"),
"name" : "deuxieme demarque",
"description" : "",
"pois" : [
ObjectId("4fe1ebb9e4b0ef9431abd904")
]
}
我的 pom.xml :
<dependency>
<groupId>org.mongodb</groupId>
<artifactId>mongo-java-driver</artifactId>
<version>2.6.5</version>
</dependency>
<dependency>
<groupId>org.jongo</groupId>
<artifactId>jongo</artifactId>
<version>0.2</version>
</dependency>
问题是,当我想使用一个 OfferAdvantage 对象时,对于集合的每个对象,优势的 id 都是 null (优势集合是 jongo api 的 MongoCollection):
Iterable<OfferAdvantage> iterable = advantageCollection.find().as(OfferAdvantage.class);
Iterator<OfferAdvantage> iterator = iterable.iterator();
ObjectId advantageId = null;
while(iterator.hasNext()) {
OfferAdvantage advantage = iterator.next();
}
在此先感谢您的帮助。