public class  AuthorizationVarResolver extends VariableResolver {
	private static final String ROOT_VARIABLE = "authorize";

	private VariableResolver originalResolver;

	public AuthorizationVarResolver(VariableResolver variableresolver) {
		originalResolver = variableresolver;
	}
	
	public Object resolveVariable(FacesContext facescontext, String s) {
		if (!s.equals(ROOT_VARIABLE)) {
			HashMap<String, Object> args = new HashMap<String, Object>();
			String authorizerName = s.substring(s.indexOf(".") + 1, s.indexOf("["));
			 
			StringTokenizer tokenizer = new StringTokenizer(
					s.substring(s.indexOf("[") + 1, s.indexOf("]")).replaceAll(" ", ""), ",");
			
			while (tokenizer.hasMoreTokens()) {
				String token = tokenizer.nextToken();
				int indexOfColon = token.indexOf(":");
				String variableName = token.substring(1, indexOfColon);
				String value = token.substring(indexOfColon + 1);
				
				
				args.put(variableName, value);
			}
			
			Authorizer author = null;
			
			try {
				author = AuthorizerFactory.getAuthorizer(authorizerName, args);
			} catch (IllegalArgumentException e) {
				e.printStackTrace();
			} catch (InstantiationException e) {
				e.printStackTrace();
			} catch (IllegalAccessException e) {
				e.printStackTrace();
			} catch (InvocationTargetException e) {
				e.printStackTrace();
			} catch (ClassNotFoundException e) {
				e.printStackTrace();
			} catch (SecurityException e) {
				e.printStackTrace();
			} catch (NoSuchMethodException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			}

			return author;
		} else {
			return originalResolver.resolveVariable(facescontext, s);
		}
	}
}