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Guice Variable Resolver

/ Published in: Java
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  1. public class GuiceVariableResolver extends VariableResolver {
  2. 	private final VariableResolver wrapped;
  3.  
  4. 	public GuiceVariableResolver(VariableResolver wrapped) {
  5. 		if (wrapped == null)
  6. 			throw new NullPointerException("wrapped " + VariableResolver.class.getName());
  7. 		this.wrapped = wrapped;
  8. 	}
  9.  
  10. 	@SuppressWarnings("unchecked")
  11. 	@Override
  12. 	public Object resolveVariable(FacesContext fctx, String name) throws EvaluationException {
  13. 		Object resolved = wrapped.resolveVariable(fctx, name);
  14. 		if (resolved != null) {
  15. 			Map<String, Object> map = fctx.getExternalContext().getApplicationMap();
  16. 			Injector injector = (Injector) map.get(Injector.class.getName());
  17. 			if (injector == null)
  18. 				throw new NullPointerException("Could not locate " + "Guice Injector in application scope using"
  19. 						+ " key '" + Injector.class.getName() + "'");
  20. 			injector.injectMembers(resolved);
  21. 		}
  22. 		return resolved;
  23. 	}
  24.  
  25. }

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