Package org.opennms.core.spring

Class BeanUtils

java.lang.Object

org.opennms.core.spring.BeanUtils

All Implemented Interfaces:

org.springframework.beans.factory.Aware, org.springframework.context.ApplicationContextAware

public class BeanUtils
extends Object
implements org.springframework.context.ApplicationContextAware

Helper methods for working with Spring beans.

Version:

$Id: $

Author:

DJ Gregor

Field Summary

Fields

Modifier and Type	Field	Description
static org.slf4j.Logger	LOG

Constructor Summary

Constructors

Constructor	Description
BeanUtils()

Method Summary

Modifier and Type	Method	Description
static <T> void	assertAutowiring(T instance)	Check that all fields that are marked with @Autowired are not null.
static <T> T	getBean(String contextId, String beanId, Class<T> clazz)	Helper method that combines getBeanFactory and getBean.
static <T> T	getBean(org.springframework.beans.factory.access.BeanFactoryReference beanFactory, String beanId, Class<T> clazz)	Get a Spring bean by name.
static org.springframework.beans.factory.access.BeanFactoryReference	getBeanFactory(String contextId)	Get a Spring BeanFactory by context ID.
static <T> T	getFactory(String contextId, Class<T> clazz)	Helper method that calls getBeanFactory(contextId).getFactory() and casts the result.
void	setApplicationContext(org.springframework.context.ApplicationContext context)
static void	setStaticApplicationContext(org.springframework.context.ApplicationContext context)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

LOG

public static final org.slf4j.Logger LOG

Constructor Detail

BeanUtils

public BeanUtils()

Method Detail

setApplicationContext

public void setApplicationContext(org.springframework.context.ApplicationContext context)

Specified by:

setApplicationContext in interface org.springframework.context.ApplicationContextAware

setStaticApplicationContext

public static void setStaticApplicationContext(org.springframework.context.ApplicationContext context)

getBeanFactory

public static org.springframework.beans.factory.access.BeanFactoryReference getBeanFactory(String contextId)

Get a Spring BeanFactory by context ID.

Parameters:

contextId - the context ID of the BeanFactory to fetch

Returns:

the BeanFactory

getBean

public static <T> T getBean(org.springframework.beans.factory.access.BeanFactoryReference beanFactory,
                            String beanId,
                            Class<T> clazz)

Get a Spring bean by name. Uses Java 5 generics to cast the returned class to the appropriate type.

Type Parameters:

T - class for the returned bean

Parameters:

beanFactory - bean factory to use to fetch this bean

beanId - ID of the bean to fetch

clazz - class representing the type for the returned bean

Returns:

bean for given bean ID casted to the appropriate class

getBean

public static <T> T getBean(String contextId,
                            String beanId,
                            Class<T> clazz)

Helper method that combines getBeanFactory and getBean.

Type Parameters:

T - class for the returned bean

Parameters:

contextId - the context ID of the BeanFactory from which to fetch this bean

beanId - ID of the bean to fetch

clazz - class representing the type for the returned bean

Returns:

bean for given bean ID casted to the appropriate class

getFactory

public static <T> T getFactory(String contextId,
                               Class<T> clazz)

Helper method that calls getBeanFactory(contextId).getFactory() and casts the result.

Type Parameters:

T - class for the returned factory

Parameters:

contextId - the context ID of the BeanFactory to fetch

clazz - class representing the type for the returned factory

Returns:

the factory casted to <T>

assertAutowiring

public static <T> void assertAutowiring(T instance)

Check that all fields that are marked with @Autowired are not null. This will identify classes that have been loaded by Spring but have not been autowired via <context:annotation-config />.