Problem when use reflect in morphia

[dingyaguang117]

public abstract class DomainBase {
    public void update(Datastore ds) {
        Class clazz = this.getClass();
        ObjectId id = null;
        UpdateOperations up = ds.createUpdateOperations(clazz).disableValidation();
        try
        {
            for(Field field : clazz.getDeclaredFields())
            {
                field.setAccessible(true);
                if (field.isAnnotationPresent(Transient.class)) continue;
                if (field.isAnnotationPresent(Id.class))
                {
                    id = (ObjectId)field.get(this);
                    continue;
                }
                if(field.get(this) != null)
                {
                    up = up.set(field.getName(),field.get(this));
                }
            }

            ds.update(ds.createQuery(clazz).filter("_id",id), up);
        }catch(Exception e)
        {
            e.printStackTrace();
        }
    }
}

when I use the way below:
ds.update(ds.createQuery(clazz).filter("_id",id),up)
will error when compile in ant :

Chinese:
对 update 的引用不明确 :
com.google.code.morphia.Datastore 中的 方法 update(T,com.google.code.morphia.query.UpdateOperations)
和 com.google.code.morphia.Datastore 中的 方法
update(com.google.code.morphia.query.Query,com.google.code.morphia.query.UpdateOperations)
都匹配

English:
update 's reference is ambiguous:
method in com.google.code.morphia.Datastore
update(T,com.google.code.morphia.query.UpdateOperations)
and method in com.google.code.morphia.Datastore
update(com.google.code.morphia.query.Query,com.google.code.morphia.query.UpdateOperations)
both matched

but it works in eclipse

so,I had to use the way below :
ds.update(ds.createQuery(clazz).filter("_id",id), up,false);
Is there any way to solve it?

[dingyaguang117]

I solve it by indicate base class type "DomainBase"

public abstract class DomainBase {
    public void update(Datastore ds) {
        Class clazz = this.getClass();
        ObjectId id = null;
        
        
        UpdateOperations<DomainBase> up = ds.createUpdateOperations(clazz).disableValidation();
        try
        {
            for(Field field : clazz.getDeclaredFields())
            {
                field.setAccessible(true);
                if (field.isAnnotationPresent(Transient.class)) continue;
                if (field.isAnnotationPresent(Id.class))
                {
                    id = (ObjectId)field.get(this);
                    continue;
                }
                if(field.get(this) != null)
                {
                    up = up.set(field.getName(),field.get(this));
                }
            }
            Query<DomainBase> query = ds.createQuery(clazz).filter("_id",id);
            ds.update(query, up);
        }catch(Exception e)
        {
            e.printStackTrace();
        }
    }
}