java code for Accessing Factory Beans

/*
Pro Spring
By Rob Harrop
Jan Machacek
ISBN: 1-59059-461-4
Publisher: Apress
*/

//spring.xml




SHA1




//////////////////////////////////////////////////////////////////////////////


import java.security.MessageDigest;

import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;

public class MessageDigestFactoryBean implements FactoryBean, InitializingBean {

private String algorithmName = "MD5";

private MessageDigest messageDigest = null;

public Object getObject() throws Exception {
return messageDigest;
}


public Class getObjectType() {
return MessageDigest.class;
}


public boolean isSingleton() {
return true;
}

public void afterPropertiesSet() throws Exception {
messageDigest = MessageDigest.getInstance(algorithmName);
}

public void setAlgorithmName(String algorithmName) {
this.algorithmName = algorithmName;
}

}



//////////////////////////////////////////////////////////////////////////////



import java.security.MessageDigest;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.FileSystemResource;

public class AccessingFactoryBeans {

public static void main(String[] args) {
BeanFactory factory = new XmlBeanFactory(new FileSystemResource(
"build/spring.xml"));

MessageDigest digest = (MessageDigest) factory
.getBean("messageDigest");


MessageDigestFactoryBean factoryBean = (MessageDigestFactoryBean) factory
.getBean("&messageDigest");
}
}