org.opennms.core.utils

Class BeanUtils

java.lang.Object

org.opennms.core.utils.BeanUtils

public abstract class BeanUtils
extends Object

Helper methods for working with Spring beans.

Version:

$Id: $

Author:

DJ Gregor

Constructor Summary

Constructors

Constructor and Description
BeanUtils()

Method Summary

Methods

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

Methods inherited from class java.lang.Object

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

Constructor Detail

BeanUtils

public BeanUtils()

Method Detail

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

assertAutowiring

public static <T> void assertAutowiring(T instance)

Check that all fields that are marked with @Autowired are not null.