[appengine-java] Re: List of sub entities does not obay list order

[Gunnar]

Hi,
Here are code for the entities MyEntity and SubEntity. Is anything
wrong with the code?
/Gunnar

package appengine.test;

import java.io.Serializable;
import java.util.ArrayList;

import javax.jdo.annotations.Element;
import javax.jdo.annotations.Extension;
import javax.jdo.annotations.IdGeneratorStrategy;
import javax.jdo.annotations.IdentityType;
import javax.jdo.annotations.PersistenceCapable;
import javax.jdo.annotations.Persistent;
import javax.jdo.annotations.PrimaryKey;
import javax.persistence.OneToMany;

import com.google.appengine.api.datastore.KeyFactory;

@PersistenceCapable(identityType = IdentityType.APPLICATION,
detachable = "true")
public class MyEntity implements Serializable {

        private static final long serialVersionUID = 1L;

        @PrimaryKey
        @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
        @Extension(vendorName = "datanucleus", key = "gae.encoded-pk", value
= "true")
        private String key;

        @Persistent
        @Element(dependent = "true")
        private ArrayList<SubEntity> myList = new ArrayList<SubEntity>();

        public Long getId() {
                return key == null ? null : KeyFactory.stringToKey(key).getId();
        }

        public ArrayList<SubEntity> getMyList() {
                return myList;
        }

        public void setMyList(ArrayList<SubEntity> myList) {
                this.myList = myList;
        }

        @Override
        public String toString() {
                return "MyEntity [keyId=" + getId() + ", myList=" + myList + 
"]";
        }

        public void clearKey() {
                key = null;
        }

        public void add(SubEntity subEntity) {
                myList.add(0,subEntity);
        }

}





package appengine.test;

import java.io.Serializable;

import javax.jdo.annotations.*;

import com.google.appengine.api.datastore.KeyFactory;

@PersistenceCapable(identityType = IdentityType.APPLICATION,
detachable="true")
public class SubEntity implements Serializable {

        private static final long serialVersionUID = 1L;

        @PrimaryKey
        @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
        @Extension(vendorName = "datanucleus", key = "gae.encoded-pk", value
= "true")
        private String key;

        @Persistent
        private String name;

        public SubEntity(String name) {
                super();
                this.name = name;
        }

        public Long getId() {
                return key == null ? null : KeyFactory.stringToKey(key).getId();
        }

        public String getName() {
                return name;
        }

        public void setName(String name) {
                this.name = name;
        }

        @Override
        public String toString() {
//              return "SubEntity [name=" + name + ", id=" + getId() + ", 
order="
+ getOrdinal() + "]";
                return "SubEntity [name=" + name + ", id=" + getId() + "]";
        }

        public void clearKey() {
                key = null;
        }

        public SubEntity copy() {
                SubEntity subEntity = new SubEntity(name);
                return subEntity;
        }

}

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