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Merge branch 'pr/582-tayo-jsf-3'

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This commit is contained in:
slavisa-baeldung 2016-08-14 08:48:08 +02:00
commit b7c563d65d
3 changed files with 59 additions and 5 deletions
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6
jsf/pom.xml
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@ -27,7 +27,7 @@
</dependency>
<dependency>
<groupId>javax.el</groupId>
<artifactId>el-api</artifactId>
<artifactId>javax.el-api</artifactId>
<version>${javax.el.version}</version>
</dependency>
@ -126,8 +126,8 @@
<org.springframework.version>4.2.5.RELEASE</org.springframework.version>
<!-- JSF -->
<com.sun.faces.version>2.1.7</com.sun.faces.version>
<javax.el.version>2.2</javax.el.version>
<com.sun.faces.version>2.2.13</com.sun.faces.version>
<javax.el.version>3.0.0</javax.el.version>
<!-- logging -->
<org.slf4j.version>1.7.13</org.slf4j.version>

23
jsf/src/main/java/com/baeldung/springintegration/controllers/ELSampleBean.java
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@ -1,13 +1,17 @@
package com.baeldung.springintegration.controllers;
import java.util.Random;
import javax.annotation.PostConstruct;
import javax.el.ELContextEvent;
import javax.el.ELContextListener;
import javax.el.LambdaExpression;
import javax.faces.application.Application;
import javax.faces.application.FacesMessage;
import javax.el.LambdaExpression;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
import javax.faces.component.html.HtmlInputText;
import javax.faces.context.FacesContext;
import java.util.Collection;
import java.util.Random;
@ManagedBean(name = "ELBean")
@ViewScoped
@ -16,22 +20,37 @@ public class ELSampleBean {
private String firstName;
private String lastName;
private String pageDescription = "This page demos JSF EL Basics";
public static final String constantField = "THIS_IS_NOT_CHANGING_ANYTIME_SOON";
private int pageCounter;
private Random randomIntGen = new Random();
@PostConstruct
public void init() {
pageCounter = randomIntGen.nextInt();
FacesContext.getCurrentInstance().getApplication().addELContextListener(new ELContextListener() {
@Override
public void contextCreated(ELContextEvent evt) {
evt.getELContext().getImportHandler().importClass("com.baeldung.springintegration.controllers.ELSampleBean");
}
});
}
public void save() {
}
public static String constantField() {
return constantField;
}
public void saveFirstName(String firstName) {
this.firstName = firstName;
}
public Long multiplyValue(LambdaExpression expr) {
Long theResult = (Long) expr.invoke(FacesContext.getCurrentInstance().getELContext(), pageCounter);
return theResult;
}
public void saveByELEvaluation() {
firstName = (String) evaluateEL("#{firstName.value}", String.class);

35
jsf/src/main/webapp/el3_intro.xhtml Normal file
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@ -0,0 +1,35 @@
<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:c="http://java.sun.com/jsp/jstl/core">
<h:head>
<title>Baeldung | Expression Language 3.0</title>
</h:head>
<h:body>
<h:outputLabel id="valueLabel" for="valueOutput" value="Composite Lambda Evaluation:"/>
<h:outputText id="valueOutput" value="#{(cube=(x->x*x*x);cube(4))}"/>
<br/>
<h:outputLabel id="staticLabel" for="staticFieldOutput" value="Static Field Output:"/>
<h:outputText id="staticFieldOutput" value="#{ElBean.constantField}"/>
<br/>
<h:outputLabel id="avgLabel" for="avg" value="Average of Integer List Value:"/>
<h:outputText id="avg" value="#{['1','2','3'].stream().average().get()}"/>
<br/>
<h:outputLabel id="lambdaLabel" for="lambdaPass" value="Passing Lambda Expressions:"/>
<h:outputText id="lambdaPass" value="#{ELBean.multiplyValue(x->x*x*x)}"/>
<br/>
<c:set var='pageLevelNumberList' value="#{[1,2,3]}"/>
<h:outputLabel id="avgPageVarLabel" for="avgPageVar" value="Average of Page-Level Integer List Value:"/>
<h:outputText id="avgPageVar" value="#{pageLevelNumberList.stream().average().get()}"/>
<br/>
<h:panelGrid title="Data Structures" border="3" >
<h:dataTable var="streamResult" value="#{pageLevelNumberList.stream().filter(x-> x>1).toList()}">
<h:column id="nameCol">
<h:outputText id="name" value="#{streamResult}"/>
</h:column>
</h:dataTable>
</h:panelGrid>
</h:body>
</html>