MongoDB学习系列3：使用morphia操作mongodb的一些实例类

package models;
import java.util.ArrayList;

//@Property(Community.MEMBERSLIST)
//@JsonIgnore
//@JsonProperty(Community.MEMBERSLIST)	
//@Embedded

@Entity(value = "community", noClassnameStored = true)
public class Community extends BaseModel {
	
	public static final String TAG = Community.class.getSimpleName();
	
	public static final String _ID        = "_id";
	public static final String TYPE       = "tp" ;

	public static Datastore ds = ds(Community.class);
	
	@Id
	private String  _id        = "" ;
	
	@Property(Community.TYPE)
	private int     type       = 0 ;
	
	@Embedded	
	private ArrayList<CommunityMember> ml = new ArrayList<CommunityMember>();
	
	public Community() {

	}
	
	
	public void setId(String id){
		this._id = id ;
	}
	
	public String getId() {
		return this._id ;
	}
	

	public void addMembers(CommunityMember m) {
		this.ml.add(m) ;
	}
	
	public ArrayList<CommunityMember> getMembers() {
		return this.ml ;
	}
	
	public ObjectNode Id2Json() {
		ObjectNode on = Json.newObject() ;
		on.put( Community._ID , this._id ) ;
		return on ;
	}
	public static Community create(JsonNode json) {
		
		Community       comm = new Community();
		CommunityMember cm   = new CommunityMember();			
		String    userid =  json.findPath(Community._ID).asText() ;
		String    cid    =  userid +"_" + System.currentTimeMillis() ;		
		
		comm.setId( cid ) ;
				
		cm.setId( userid );
		cm.setRole( Role.OWNER ) ;
		comm.addMembers( cm ) ;
		
		ds.save(comm) ;
		return comm;
	}
	
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
package models;

@Entity(noClassnameStored = true)
public class CommunityMember extends BaseModel{	
	
	public static final String TAG = CommunityMember.class.getSimpleName();
	
	public static final String ROLE ="rl" ; 
	public static final String ID   ="id" ;
	
	@Property(CommunityMember.ROLE)
	private int role = Role.NONE ;
	
	@Property(CommunityMember.ID)
	private String id = "" ;
	
	public CommunityMember() {
		
	}
	
	public void setRole(int r) {
		this.role = r ;
	}
	
	public int getRole() {
		return this.role ;
	}
	
}