Tapestry: Custom BeanModel to support "is" getters for javal.ang.Boolean

AppModule.java

public class AppModule {
  public static BeanModelSource decorateBeanModelSource(BeanModelSource defaultImpl) {
    return new MyBeanModelSource(defaultImpl);
  }
}

MyBeanModelSource.java

public class MyBeanModelSource {
  private BeanModelSource defaultImpl;
  
  public MyBeanModelSource(BeanModelSource defaultImpl) {
    this.defaultImpl = defaultImpl;
  }
  
  @Deprecated
  public <T> BeanModel<T> create(Class<T> beanClass, boolean filterReadOnlyProperties, Messages messages) {
    return filterReadOnlyProperties
       ? createEditModel(beanClass, messages)
       : createDisplayModel(beanClass, messages)
  }
  
  public <T> BeanModel<T> createEditModel(Class<T> beanClass, Messages messages) {
    // I assume this works since the Boolean setters comply with the java beans spec.
    return defaultImpl.createEditModel(beanClass, messages);
  }

  public <T> BeanModel<T> createDisplayModel(Class<T> beanClass, Messages messages) {
    BeanModel<T> model = defaultImpl.createDisplayModel(beanClass, messages);
    addBooleanIsGetters(model);
    return model;
  }

  private <T> void addBooleanIsGetters(BeanModel<T> model) {
    Method[] methods = model.getBeanType().getMethods();
    for (final Method method : methods) {
      if (method.getParameterTypes().length == 0
            && method.getReturnType().equals(Boolean.class)
            && method.getName().startsWith("is") {
        
        char firstChar = Character.toLowercase(method.getName().charAt(2));
        String propertyName = firstChar + method.getName().substring(3);
        
        PropertyConduit conduit = new PropertyConduit {
           public Object get(Object instance) {
              // TODO: try / catch
              return method.invoke(instance);
           }
           
           public Class getPropertyType() {
              returh Boolean.class;
           }
           
           public void set(Object instance, Object value) {
              // TODO: implement
              throw new UnsupportedOperationException();
           }
           
           public <T extends Annotation> T getAnnotation(Class<T> annotationClass) {
              return method.getAnnotation(annotationClass);
           }
        };
        
        model.add(propertyName, conduit);
    }
  }
  
}