Getting nullpointer exception when Annotation are used for Spring 3

[pol]

Hello

I have a small application using Spring 3 and Hibernate 4 with JSF2, When I am running the application I am getting.

  java.lang.NullPointerException at
    net.test.managed.bean.EmployeesManagedBean.getEmpList(EmployeesManagedBean.java:53)

What am I doing wrongly to get **nullpointer exception**? Any help is highly appreciable.

Thanks

ManagedBean:

@Named("empMB")
    @Scope("request")
    public class EmployeesManagedBean implements Serializable {

    @Inject
    IEmployeesService employeesService;
    
        public List<Employees> getEmpList() {
            try {
                empList = new ArrayList<Employees>();
                empList.addAll(getEmployeesService().getEmployees());
            } catch (Exception e) {
                e.printStackTrace();            
            }
            return empList;
        }
    }

and I have Inject annotation:


In EmployeesService I have annotations like:

    @Transactional(readOnly = true)
    @Named
    public class EmployeesService implements IEmployeesService {

    @Inject
    IEmployeesDAO employeesDAO;
    
    @Override
    public List<Employees> getEmployees() {
        return getEmployeesDAO().getEmployees();
    }

In EmployeesDAO I have annotations like:

    @Named
    public class EmployeesDAO implements IEmployeesDAO {
   

    @Override
    public List<Employees> getEmployees() {
        List query = this.getSessionFactory().getCurrentSession().getNamedQuery("getEmp").list();                
        return query;
    }

Entity class:

    @Entity
    @javax.persistence.NamedNativeQuery(name = "getEmp", query = "{ ? = call getemployees }", resultClass = Employees.class, hints = { @javax.persistence.QueryHint(name = "org.hibernate.callable", value = "true") })
    @Table(name = "EMPLOYEES")
    public class Employees {

and finally in applicationContext.xml I have

<context:component-scan base-package="net.test" />

applicationContext.xml:

    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx"
        xmlns:context="http://www.springframework.org/schema/context"
        xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schem...-beans-3.0.xsd
    http://www.springframework.org/schema/tx
    http://www.springframework.org/schem...ing-tx-3.0.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-3.0.xsd">    
        
        <context:component-scan base-package="net.test" />
        <!-- Data Source Declaration -->
    <bean id="DataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
            destroy-method="close">
            <property name="driverClass" value="oracle.jdbc" />
            <property name="jdbcUrl" value="jdbc:oracle:thin:@server:1521:DEV" />
            <property name="user" value="scott" />
            <property name="password" value="tiger" />
            <property name="maxPoolSize" value="10" />
            <property name="maxStatements" value="0" />
            <property name="minPoolSize" value="5" />
        </bean> 
        <!-- Session Factory Declaration -->
        <bean id="SessionFactory"
            class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
            <property name="dataSource" ref="DataSource" />        
            <property name="hibernateProperties">
                <props>
                    <prop key="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</prop>
                    <prop key="hibernate.show_sql">true</prop>
                </props>
            </property>
        </bean>
        <!-- Enable the configuration of transactional behavior based on annotations -->
        <tx:annotation-driven transaction-manager="txManager" />
        <!-- Transaction Manager is defined -->
        <bean id="txManager"
            class="org.springframework.orm.hibernate4.HibernateTransactionManager">
            <property name="sessionFactory" ref="SessionFactory" />
        </bean>
    </beans>

Stacktrace

at net.test.employees.dao.EmployeesDAO.getEmployees(EmployeesDAO.java:27)
	at net.test.employees.service.EmployeesService.getEmployees(EmployeesService.java:24)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:318)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
	at $Proxy137.getEmployees(Unknown Source)
	at net.test.managed.bean.EmployeesManagedBean.getEmpList(EmployeesManagedBean.java:51)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)