Java 我们如何在eclipseLink中使用自己的集合进行延迟加载?
我想使用MyCollection实现java提供的集合接口。它可以很好地用于即时加载,但对于延迟加载,eclipselink使用自己的实现(间接列表)。是否可以使用MyCollection进行延迟加载 MyCollection代码如下所示:Java 我们如何在eclipseLink中使用自己的集合进行延迟加载?,java,eclipselink,lazy-loading,Java,Eclipselink,Lazy Loading,我想使用MyCollection实现java提供的集合接口。它可以很好地用于即时加载,但对于延迟加载,eclipselink使用自己的实现(间接列表)。是否可以使用MyCollection进行延迟加载 MyCollection代码如下所示: package com.alta.convertor; import java.util.Collection; import java.util.Iterator; import java.util.Vector; public class MyCol
package com.alta.convertor;
import java.util.Collection;
import java.util.Iterator;
import java.util.Vector;
public class MyCollection<E> implements Collection<E>,Cloneable{
Collection<E> collection;
@SuppressWarnings({ "unchecked", "rawtypes" })
public MyCollection() {
this(new Vector());
}
public MyCollection(Collection<E> collection) {
this.collection=collection;
}
@Override
public int size() {
return collection.size();
}
@Override
public boolean isEmpty() {
return collection.isEmpty();
}
@Override
public boolean contains(Object o) {
return collection.contains(o);
}
@Override
public Iterator<E> iterator() {
return collection.iterator();
}
@Override
public Object[] toArray() {
return collection.toArray();
}
@Override
public <T> T[] toArray(T[] a) {
return collection.toArray(a);
}
@Override
public boolean add(E e) {
return false;
}
@Override
public boolean remove(Object o) {
return collection.remove(o);
}
@Override
public boolean containsAll(Collection<?> c) {
return collection.containsAll(c);
}
@Override
public boolean addAll(Collection<? extends E> c) {
return collection.addAll(c);
}
@Override
public boolean removeAll(Collection<?> c) {
return collection.removeAll(c);
}
@Override
public boolean retainAll(Collection<?> c) {
return collection.retainAll(c);
}
@Override
public void clear() {
collection.clear();
}
}
私有MyCollection地址数组
public Person() {
}
public Person(String firstName, String lastName, String email) {
super();
this.firstName = firstName;
this.lastName = lastName;
this.email = email;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public MyCollection<Address> getAddressArray() {
return addressArray;
}
public void setAddressArray(MyCollection<Address> address) {
this.addressArray = address;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public Long getPersonId() {
return personId;
}
public void setPersonId(Long personId) {
this.personId = personId;
}
}
公众人物(){
}
公众人物(stringfirstname、stringlastname、stringemail){
超级();
this.firstName=firstName;
this.lastName=lastName;
this.email=电子邮件;
}
公共字符串getEmail(){
回复邮件;
}
公用电子邮件(字符串电子邮件){
this.email=电子邮件;
}
公共MyCollection getAddressArray(){
返回地址数组;
}
public void setAddressArray(MyCollection地址){
this.addressArray=地址;
}
公共字符串getFirstName(){
返回名字;
}
public void setFirstName(字符串firstName){
this.firstName=firstName;
}
公共字符串getLastName(){
返回姓氏;
}
public void setLastName(字符串lastName){
this.lastName=lastName;
}
公共长getPersonId(){
回归人格;
}
公共无效setPersonId(长personId){
this.personId=personId;
}
}
当前没有,您需要使用一个集合接口来允许延迟(列表、设置、映射)。如果使用的是EAGER,则可以使用自己的集合类型
但是,我目前正在处理这个问题,很可能很快会检查到2.6的修复
一般来说,如果可以的话,最好还是使用集合接口。
您还可以将关系包装在表示集合的可嵌入文件中 当我们使用反向实体时,eclipselink中的多通映射是否可能有延迟加载?
public Person() {
}
public Person(String firstName, String lastName, String email) {
super();
this.firstName = firstName;
this.lastName = lastName;
this.email = email;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public MyCollection<Address> getAddressArray() {
return addressArray;
}
public void setAddressArray(MyCollection<Address> address) {
this.addressArray = address;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public Long getPersonId() {
return personId;
}
public void setPersonId(Long personId) {
this.personId = personId;
}
}