Obter valor de ManagedBean JSF 1.2

Método para obter valor de um ManagedBean na versão 1.2 do JSF.

public BaseViewBean accessBean(String beanName, Class viewClass) {

  StringBuffer valueBinding = new StringBuffer();
  valueBinding.append(CERQUILHA);
  valueBinding.append(ABRE_CHAVES);
  valueBinding.append(beanName);
  valueBinding.append(FECHA_CHAVES);

  ValueExpression exp = context.getApplication().getExpressionFactory()
    .createValueExpression(context.getELContext(),
     valueBinding.toString(), viewClass);

  BaseViewBean bean = (BaseViewBean) exp.getValue(context.getELContext());

  return bean;
 }

Onde:
BaseViewBean - Classe ManagedBean padrão da qual todas extendem.