Dynamic MenuBar with dynamic popup items

answered 2010-09-13 06:23:29 +0800

yaiyaikung
30

Thank you Bence,

Yes, I did it! I removed it but error so must override method of TreeNode interface and
I can't remove a @Column(name = "SEQ_MENU_LEVEL") .....
because i will be use it to CRUD.
I know what's problem of your suggestion is it not work for my mapping such as

@IndexColumn(name="SEQ_MENU_LEVEL", base = AppInfo.BASE)
AppInfo.BASE where is it library or package of AppInfo.BASE
@OneToMany(cascade=CascadeType.ALL, fetch = FetchType.EAGER) 

and if i use @ManyToOne and @OneToMany together compile create basicBean is error!

and please example implementation getRoot() and getDefault()
if It's my DAO and EntityModel classes

I hope you understand me,

answered 2010-09-13 04:34:29 +0800

btakacs
153 ● 3 ● 4

Hi, yaiyaikung

Did you even read my previous post?
Please do what I suggested. You should concentrate the word: "remove".

Other thing: If your getDefault method returns null, then what will you display by default? Nothing. Is this the behaviour you intend to impement?

Third thing: read my older posts: I suggested to implement "getRoot(), and getDefault() for your dao", but you put them into the entity...

I know JPA is a little bit complex at the first glance, and may cause confusion if you want too big thing first time. I suggest you start studying the JPA specification. And start a pilot project with more simple examples to get to know that. Write some CRUD tests, modify the mapping, and check behaviour of the framework with that. Spring JPA has many useful classes to help Unit testing.

Regards:
Bence

answered 2010-09-13 02:35:42 +0800

yaiyaikung
30

Hi, Bence

It's error, How i can do it?
I use spring zk

INFO: Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@502819: defining beans
SEVERE: Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'basicDAO': Injection of persistence methods failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [config/datasource-context.xml]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: zkspringjpa] Unable to build EntityManagerFactory
Related cause: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [config/datasource-context.xml]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.transaction.config.internalTransactionAdvisor': Cannot create inner bean '(inner bean)' of type [org.springframework.transaction.interceptor.TransactionInterceptor] while setting bean property 'transactionInterceptor'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)': Cannot resolve reference to bean 'transactionManager' while setting bean property 'transactionManager'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager' defined in class path resource [config/datasource-context.xml]: Cannot resolve reference to bean 'entityManagerFactory' while setting bean property 'entityManagerFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [config/datasource-context.xml]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: zkspringjpa] Unable to build EntityManagerFactory
Related cause: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [config/datasource-context.xml]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.transaction.config.internalTransactionAdvisor': Cannot create inner bean '(inner bean)' of type [org.springframework.transaction.interceptor.TransactionInterceptor] while setting bean property 'transactionInterceptor'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)': Cannot resolve reference to bean 'transactionManager' while setting bean property 'transactionManager'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager' defined in class path resource [config/datasource-context.xml]: Cannot resolve reference to bean 'entityManagerFactory' while setting bean property 'entityManagerFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [config/datasource-context.xml]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: zkspringjpa] Unable to build EntityManagerFactory
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.postProcessPropertyValues(PersistenceAnnotationBeanPostProcessor.java:324)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:996)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:470)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
at java.security.AccessController.doPrivileged(Native Method)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:220)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:429)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:729)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:381)
at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:255)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:199)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:45)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3934)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4429)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:516)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:583)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [config/datasource-context.xml]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: zkspringjpa] Unable to build EntityManagerFactory
Related cause: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [config/datasource-context.xml]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.transaction.config.internalTransactionAdvisor': Cannot create inner bean '(inner bean)' of type [org.springframework.transaction.interceptor.TransactionInterceptor] while setting bean property 'transactionInterceptor'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)': Cannot resolve reference to bean 'transactionManager' while setting bean property 'transactionManager'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager' defined in class path resource [config/datasource-context.xml]: Cannot resolve reference to bean 'entityManagerFactory' while setting bean property 'entityManagerFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [config/datasource-context.xml]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: zkspringjpa] Unable to build EntityManagerFactory
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1336)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:471)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
at java.security.AccessController.doPrivileged(Native Method)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:220)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:308)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:297)
at org.springframework.beans.factory.BeanFactoryUtils.beansOfTypeIncludingAncestors(BeanFactoryUtils.java:224)
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.findDefaultEntityManagerFactory(PersistenceAnnotationBeanPostProcessor.java:503)
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.findEntityManagerFactory(PersistenceAnnotationBeanPostProcessor.java:473)
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor$PersistenceElement.resolveEntityManager(PersistenceAnnotationBeanPostProcessor.java:598)
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor$PersistenceElement.getResourceToInject(PersistenceAnnotationBeanPostProcessor.java:569)
at org.springframework.beans.factory.annotation.InjectionMetadata$InjectedElement.inject(InjectionMetadata.java:192)
at org.springframework.beans.factory.annotation.InjectionMetadata.injectMethods(InjectionMetadata.java:117)
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.postProcessPropertyValues(PersistenceAnnotationBeanPostProcessor.java:321)
... 31 more

answered 2010-09-13 02:35:28 +0800

yaiyaikung
30

import java.util.List;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;

import org.hibernate.annotations.IndexColumn;

import th.co.truecorp.ess.nips.master.util.menu.TreeNode;

@Entity(name="MainMenuControls")
@Table( name ="MAIN_MENU_CONTROLS")
public class MainMenuControls implements TreeNode
{
//private static final long serialVersionUID = 1L;

public TreeNode getChildAt(int childIndex) {

return null;
}
public int getChildCount() {
return children.size();
}


public Long getId() {
return this.main_menu_id.longValue();
}


public String getName() {
return this.main_menu_display;
}


public boolean isLeaf() {
if(children.size()==0)
return true;
else
return false;
}

public boolean isRoot() {
if(parent_menu_id == 0 ||parent_menu_id==null)
return true;
else
return false;
}

public MainMenuControls getDefault(){

return null;
}

//Generate Class Body.
public boolean equals(Object obj) {
if (this == obj) return true;
if (obj == null) return false;
if (!(obj instanceof MainMenuControls)) return false;
MainMenuControls other = (MainMenuControls) obj;
if (this.getMain_menu_id() == null) {
if (other.getMain_menu_id() != null)return false;
} else if (! this.getMain_menu_id().equals(other.getMain_menu_id()))return false;
return true;
}

public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((this.getMain_menu_id() == null) ? 0 : this.getMain_menu_id().hashCode());
return result;
}
public MainMenuControls(){}

public MainMenuControls(MainMenuControls obj){
this.main_menu_id = obj.main_menu_id;
this.main_menu_display = obj.main_menu_display;
this.relate_process_cd = obj.relate_process_cd;
this.parent_menu_id = obj.parent_menu_id;
this.last_modified_date = obj.last_modified_date;
this.last_modified_user = obj.last_modified_user;
this.seq_menu_level = obj.seq_menu_level;
}

@Column(name = "MAIN_MENU_ID", nullable=false)
@SequenceGenerator(name="SQ_MAIN_MENU_ID", sequenceName="SQ_MAIN_MENU_ID")
@Id @GeneratedValue(generator="SQ_MAIN_MENU_ID")
protected Integer main_menu_id;
public void setMain_menu_id(Integer value) {
this.main_menu_id = value;
}
public Integer getMain_menu_id(){
return this.main_menu_id;
}

@Column(name = "MAIN_MENU_DISPLAY", nullable=false)
protected String main_menu_display;
public void setMain_menu_display(String value) {
this.main_menu_display = value;
}
public String getMain_menu_display(){
return this.main_menu_display;
}

@Column(name = "RELATE_PROCESS_CD")
protected String relate_process_cd;
public void setRelate_process_cd(String value) {
this.relate_process_cd = value;
}
public String getRelate_process_cd(){
return this.relate_process_cd;
}

@Column(name = "PARENT_MENU_ID")
protected Integer parent_menu_id;
public void setParent_menu_id(Integer value) {
this.parent_menu_id = value;
}
public Integer getParent_menu_id(){
return this.parent_menu_id;
}

@Column(name = "LAST_MODIFIED_USER", nullable=false)
protected String last_modified_user;
public void setLast_modified_user(String value) {
this.last_modified_user = value;
}
public String getLast_modified_user(){
return this.last_modified_user;
}

@Column(name = "LAST_MODIFIED_DATE", nullable=false)
protected java.util.Date last_modified_date;
public void setLast_modified_date(java.util.Date value) {
this.last_modified_date = value;
}
public java.util.Date getLast_modified_date(){
return this.last_modified_date;
}

@Column(name = "SEQ_MENU_LEVEL")
protected Long seq_menu_level;
public void setSeq_menu_level(Long value) {
this.seq_menu_level = value;
}
public Long getSeq_menu_level(){
return this.seq_menu_level;
}

@ManyToOne(cascade = {CascadeType.PERSIST, CascadeType.MERGE})
@JoinColumn(name = "PARENT_MENU_ID", referencedColumnName = "MAIN_MENU_ID", insertable = false , updatable = false)
private MainMenuControls parent;
public MainMenuControls getParent() {
return parent;
}
public void setParent(MainMenuControls parent) {
this.parent = parent;
}

@OneToMany(cascade = {CascadeType.PERSIST, CascadeType.MERGE})
@IndexColumn(name = "SEQ_MENU_LEVEL")
@JoinColumn(name="PARENT_MENU_ID", nullable=false)
private List<MainMenuControls> children;
public List<MainMenuControls> getChildren() {
return children;
}
public void setChildren(List<MainMenuControls> children) {
this.children = children;
}
}

answered 2010-09-08 06:59:33 +0800

btakacs
153 ● 3 ● 4

Hi, yaiyaikung

First: not override, but implementation the interface.

Second: if you use SEQ_MENU_LEVEL as an IndexColumn, you should not have explicit getters and setters for that.

So remove

@Column(name = "SEQ_MENU_LEVEL")
protected Long seq_menu_level;
public void setSeq_menu_level(Long value) {
this.seq_menu_level = value;
}
public Long getSeq_menu_level(){
return this.seq_menu_level;
}

Before you start to implement such an application, you should study JPA more deeply.
And some ZK study would be useful too...

answered 2010-09-08 05:05:35 +0800

yaiyaikung
30

Bence ,Help me Please

------------------------------------------------------------------------------------------------------
error here!
.......
.......
@OneToMany(cascade=CascadeType.ALL, fetch = FetchType.EAGER)
@Cascade({org.hibernate.annotations.CascadeType.ALL})
@IndexColumn(name="SEQ_MENU_LEVEL", base = AppInfo.BASE)
@JoinColumn(name="PARENT_MENU_ID", nullable=false)

.......
.......

......
and I Override methods of TreeNode right?
if i delete @IndexColumn(name="SEQ_MENU_LEVEL", base = AppInfo.BASE)
then can compile but runtime error

@Override
public TreeNode getChildAt(int childIndex) {

return null;
}

@Override
public int getChildCount() {
return 0;
}

@Override
public Long getId() {
return this.main_menu_id.longValue();
}

@Override
public String getName() {
return this.main_menu_display;
}

@Override
public boolean isLeaf() {

return false;
}

@Override
public boolean isRoot() {
if(parent_menu_id == 0 ||parent_menu_id==null)
return true;
else
return false;
}

public MainMenuControls getRoot(){
if(parent_menu_id == 0 ||parent_menu_id==null)
return this.main_menu_id;
}

public MainMenuControls getDefault(){

return null;
}

........................................

answered 2010-09-07 22:23:09 +0800

yaiyaikung
30

Hi Bence, Thank you for your help.
What if I have questions about ZK I will ask you again. And for your help,
if you come to Thailand. I will be your guide or suggest to attractions for you free! -:)

Yai,
King Mongkut's University of Technology Thonburi, Bangkok ,Thailand
[email protected]

answered 2010-09-07 08:28:38 +0800

btakacs
153 ● 3 ● 4

Hi, yaiyaikung

Menuitem is the name of my entity. So for you you should modify your code:

@Entity(name="MainMenuControls")
@Table( name ="MAIN_MENU_CONTROLS")
public class MainMenuControls implements TreeNode

@OneToMany(cascade=CascadeType.ALL, fetch = FetchType.EAGER) 
@Cascade( { org.hibernate.annotations.CascadeType.ALL} )
@IndexColumn(name = "position", base = AppInfo.BASE)
@JoinColumn(name="PARENT_MENU_ID", nullable=false)
private List<MainMenuControls> children;
public List<MainMenuControls> getChildren() {
	return children;
}

public void setChildren(List<MainMenuControls> children) {
	this.children = children;
}

@ManyToOne()
@JoinColumn(name="PARENT_MENU_ID", insertable=false, updatable=false, nullable=false)
private MainMenuControlsparent; 
public MainMenuControlsgetParent() {
	return parent;
}

I guess, maybe my position is your SEQ_MENU_LEVEL, is it?

Hey, this way I'm writing the your ORM code... If you continue asking not ZK related questions, I will send you the bill ;-)

answered 2010-09-07 05:24:27 +0800

yaiyaikung
30

updated 2010-09-07 05:29:53 +0800

thank you Bence,
this is my full Mapping class :
-----------------------------------------------------------------------------------------------------------------------------------------------

import java.util.*;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;

import org.zkoss.zul.Menuitem;

@Entity(name="MainMenuControls")
@Table( name ="MAIN_MENU_CONTROLS")
public class MainMenuControls
{
//Generate Class Body.
public boolean equals(Object obj) {
if (this == obj) return true;
if (obj == null) return false;
if (!(obj instanceof MainMenuControls)) return false;
MainMenuControls other = (MainMenuControls) obj;
if (this.getMain_menu_id() == null) {
if (other.getMain_menu_id() != null)return false;
} else if (! this.getMain_menu_id().equals(other.getMain_menu_id()))return false;
return true;
}

public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((this.getMain_menu_id() == null) ? 0 : this.getMain_menu_id().hashCode());
return result;
}
public MainMenuControls(){}

public MainMenuControls(MainMenuControls obj){
this.main_menu_id = obj.main_menu_id;
this.main_menu_display = obj.main_menu_display;
this.relate_process_cd = obj.relate_process_cd;
this.parent_menu_id = obj.parent_menu_id;
this.last_modified_date = obj.last_modified_date;
this.last_modified_user = obj.last_modified_user;
this.seq_menu_level = obj.seq_menu_level;
}

@Column(name = "MAIN_MENU_ID", nullable=false)
@SequenceGenerator(name="SQ_MAIN_MENU_ID", sequenceName="SQ_MAIN_MENU_ID")
@Id @GeneratedValue(generator="SQ_MAIN_MENU_ID")
protected Integer main_menu_id;
public void setMain_menu_id(Integer value) {
this.main_menu_id = value;
}
public Integer getMain_menu_id(){
return this.main_menu_id;
}

@Column(name = "MAIN_MENU_DISPLAY", nullable=false)
protected String main_menu_display;
public void setMain_menu_display(String value) {
this.main_menu_display = value;
}
public String getMain_menu_display(){
return this.main_menu_display;
}

@Column(name = "RELATE_PROCESS_CD")
protected String relate_process_cd;
public void setRelate_process_cd(String value) {
this.relate_process_cd = value;
}
public String getRelate_process_cd(){
return this.relate_process_cd;
}

@Column(name = "PARENT_MENU_ID")
protected Integer parent_menu_id;
public void setParent_menu_id(Integer value) {
this.parent_menu_id = value;
}
public Integer getParent_menu_id(){
return this.parent_menu_id;
}

@Column(name = "LAST_MODIFIED_USER", nullable=false)
protected String last_modified_user;
public void setLast_modified_user(String value) {
this.last_modified_user = value;
}
public String getLast_modified_user(){
return this.last_modified_user;
}

@Column(name = "LAST_MODIFIED_DATE", nullable=false)
protected java.util.Date last_modified_date;
public void setLast_modified_date(java.util.Date value) {
this.last_modified_date = value;
}
public java.util.Date getLast_modified_date(){
return this.last_modified_date;
}

@Column(name = "SEQ_MENU_LEVEL")
protected Long seq_menu_level;
public void setSeq_menu_level(Long value) {
this.seq_menu_level = value;
}
public Long getSeq_menu_level(){
return this.seq_menu_level;
}


@OneToMany(cascade=CascadeType.ALL, fetch = FetchType.EAGER)
@JoinColumn(name="parent", nullable=false)
private List<Menuitem> children;
public List<Menuitem> getChildren() {
return children;
}

public void setChildren(List<Menuitem> children) {
this.children = children;
}

@ManyToOne()
@JoinColumn(name="parent", insertable=false, updatable=false, nullable=false)
private Menuitem parent;
public Menuitem getParent() {
return parent;
}
}

//////////////////////////////////////////////////////////////////////////////

Can i edit you code in MenuItem --- > Menuitem ?
and What is the package of the MenuItem?