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idref gives exception

 
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Hello Friends....

I am trying a simple program to see how idref works ... but i am getting exception, so wondering how it works and when to use it?
Please help

Class B: -



and class A: -

package org.spring.tut.helloworld;




the spring xml
: -



and my Tester class: -



i am getting following exception ....


Feb 10, 2013 11:06:14 PM org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@933bcb: startup date [Sun Feb 10 23:06:14 IST 2013]; root of context hierarchy
Feb 10, 2013 11:06:14 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [DepInject.xml]
Feb 10, 2013 11:06:14 PM org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
INFO: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@faadb1: defining beans [b,a2]; root of factory hierarchy
Feb 10, 2013 11:06:15 PM org.springframework.beans.factory.support.DefaultSingletonBeanRegistry destroySingletons
INFO: Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@faadb1: defining beans [b,a2]; root of factory hierarchy
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'a2' defined in class path resource [DepInject.xml]: Initialization of bean failed; nested exception is org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type 'java.lang.String' to required type 'org.spring.tut.helloworld.B' for property 'objOfB'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [java.lang.String] to required type [org.spring.tut.helloworld.B] for property 'objOfB': no matching editors or conversion strategy found
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:529)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:605)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
at org.spring.tut.helloworld.testarea.DepInjectTester.main(DepInjectTester.java:15)
Caused by: org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type 'java.lang.String' to required type 'org.spring.tut.helloworld.B' for property 'objOfB'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [java.lang.String] to required type [org.spring.tut.helloworld.B] for property 'objOfB': no matching editors or conversion strategy found
at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:465)
at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:496)
at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:490)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.java:1417)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1376)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1129)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
... 11 more
Caused by: java.lang.IllegalStateException: Cannot convert value of type [java.lang.String] to required type [org.spring.tut.helloworld.B] for property 'objOfB': no matching editors or conversion strategy found
at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:264)
at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:450)
... 17 more




.... how does idref work ? .... i refered to the spring documentation reference but no explict explanation of the same !
 
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No one uses <idRef> so don't worry about it.

Mark
 
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