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Posted By

narkisr on 01/21/08


Tagged

java generics spring Context


Versions (?)


A simple solution for "castless" spring application context

Published in: Java 

A very simple way of getting bean instances from Spring context without casting returned object, the assumption is that the bean id's are matching the classes names.


Plain TextExpand 
  1. //The interface:
  2.  
  3. public interface AppContainer {
  4.  
  5.     <T> T getIns(Class<T> clazz);
  6.  
  7.     Object getInstanceSkipCast(Class clazz);
  8.  
  9. }
  10.  
  11.  
  12. //The implementation:
  13.  
  14. import static org.apache.commons.lang.StringUtils.uncapitalize;
  15.  
  16. public class DefaultAppContainer implements AppContainer {
  17.  
  18.     private ApplicationContext factory;
  19.  
  20.     public DefaultAppContainer() {
  21.         factory = new ClassPathXmlApplicationContext("spring/application.xml");
  22.     }
  23.  
  24.     public <T> T getIns(Class<T> clazz) {// this should work for 90% of the casses
  25.         return (T) factory.getBean(uncapitalize(clazz.getSimpleName()));
  26.     }
  27.  
  28.     public Object getInstanceSkipCast(Class clazz) {
  29.         return factory.getBean(uncapitalize(clazz.getSimpleName()));
  30.     }
  31.  
  32.  
  33. }

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