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< t:aliasBeansScope >

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<t:aliasBeansScope>


Contents

  1. Introduction
  2. Tag Attributes
  3. Example

Introduction

The t:aliasBeansScope tag defines the scope in which aliasBean objects are configured.The aliasBeans should be declared right after this tag. The body of this tag can contain t:aliasBean tags that define alias objects.


Tag Attributes


AttributeDescription   Type    
id The unique identifier value for this component. The value must be unique within the closest naming container (e.g.,h:form or f:subview).This value must be a static value.String
rendered A value-binding expression that evaluates to a Boolean condition indicating if this component should be rendered.String


Example


(Same as t:aliasBean)

 As an example suppose we need to add Address information to some of the entities in our application. First thing to do is to create the Address class with the addressLine1 and addressLine2.


Address.java

package com.developersBook.aliasBean.example.domain;
public class Address {
private String addressLine1;
private String addressLine2;
public Address() {}
public Address(String addressLine1, String addressLine2){
super();
this.addressLine1 = addressLine1;
this.addressLine2 = addressLine2;
}
public String getAddressLine1() {
return addressLine1;
}
public void setAddressLine1(String addressLine1) {
this.addressLine1 =addressLine1;
}
public String getAddressLine2() {
return addressLine2;
}
public void setAddressLine2(String addressLine2) {
this.addressLine2 =addressLine2;
}
  }

And an example entity that needs a Address information. Let’s say a Person



Person.java

package com.developersBook.aliasBean.example.domain;
public class Person{
private String firstName;
private String lastName;
private Address address;
public Person(){}
public Person(String firstName, String lastName, Address address){
super();
this.firstName = firstName;
this.lastName = lastName;
this.address = address;
}
public Address getAddress(){
return address;
}
public void setAddress(Address address){
this.address = 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;
}
  }

After creating the domain entities, we need a JSF page and a backing bean to create a new Person.



PersonEditBean.java

package com.developersBook.aliasBean.example.bean;
import com.developersBook.aliasBean.example.domain.Address;
public class PersonEditBean{
private Address address;
public Address getAddress() {
if(address == null){
address = new Address();
}
return address;
}
public void setAddress(Address address){
this.address = address;
}
public void editPerson() {
//save the address with the underlying technology
}
  }

Finally the JSF Page for PersonEdit and the Address jsp fragment.



personEdit.jsp

<%@ page language="java" pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<html>
<head><title></title></head>
<body>
<f:view>
 <h:form>
  <h:panelGrid columns="2">
   <h:outputLabel value="firstName" for="firstName"/>
   <h:inputText id="firstName" value="#{PersonEditBean.person.firstName}" />
   <h:outputLabel value="lastName" for="lastName"/>
   <h:inputText id="lastName" value="#{PersonEditBean.person.lastName}" />
  </h:panelGrid>

  <t:aliasBeansScope>
   <t:aliasBean alias="#{addressAlias}" value="#{PersonEditBean.person.address}" />
   <f:subview id="addressView">
    <%@ include file="address.jsp"%>
   </f:subview>
  </t:aliasBeansScope>


  <h:commandButton action="#{PersonEditBean.person.address}" value="Submit" />
 </h:form>
</f:view>
</body>
</html>


address.jsp (partial)

<%@ page pageEncoding="utf-8"%>
  <h:panelGrid columns="2?>
   <h:outputLabel value="AddressLine1" for="addressLine1"/>
   <h:inputText id="addressLine1" value="#{addressAlias.addressLine1}" />

   <h:outputLabel value="AddressLine2" for="addressLine2"/>
   <h:inputText id="addressLine2" value="#{addressAlias.addressLine2}" />
 </h:panelGrid>


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t:stylesheet
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Core Tags
f:actionListener
f:attribute
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f:validateDoubleRange
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h:column
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h:commandLink
h:dataTable
h:form
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h:inputTextarea
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h:messages
h:outputFormat
h:outputLabel
h:outputLink
h:outputText
h:panelGrid
h:panelGroup
h:selectBooleanCheckbox
h:selectManyCheckbox
h:selectManyListbox
h:selectManyMenu
h:selectOneListbox
h:selectOneMenu
h:selectOneRadio

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