/*
* returns the declared fields for the class and its superclass.
*/
private static List<Field> getAllFields(Component component) {
List<Field> fields = new ArrayList<Field>();
fields.addAll(Arrays.asList(component.getClass().getDeclaredFields()));
// check also the fields of the super class if exists
if (component.getClass().getSuperclass() != null) {
fields.addAll(Arrays.asList(component.getClass().getSuperclass().getDeclaredFields()));
}
return fields;
}
/**
* @param component The component to analyse.
* @return All config options of the component with their respective value.
*/
public static Map<ConfigOption, Object> getConfigOptionValues(Component component) {
Map<ConfigOption, Object> optionValues = new HashMap<ConfigOption, Object>();
List<Field> fields = getAllFields(component);
for (Field field : fields) {
ConfigOption option = field.getAnnotation(ConfigOption.class);
if (option != null) {
try {
// we invoke the public getter instead of accessing a private field (may cause problem
// with SecurityManagers)
// use Spring BeanUtils TODO: might be unnecessarily slow because we already have the
// field?
Object value =
BeanUtils.getPropertyDescriptor(component.getClass(), field.getName())
.getReadMethod()
.invoke(component);
optionValues.put(option, value);
} catch (IllegalArgumentException e1) {
e1.printStackTrace();
} catch (IllegalAccessException e1) {
e1.printStackTrace();
} catch (BeansException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}
}
return optionValues;
}
/**
* Configures the given component by setting the value for the appropriate config option.
*
* @param component the component to be configured
* @param configName the name of the config option
* @param configValue the value of the config option
*/
@Deprecated
public static <T> void configure(Component component, String configName, T configValue) {
List<Field> fields = getAllFields(component);
for (Field f : fields) {
ConfigOption option = f.getAnnotation(ConfigOption.class);
if (option != null) {
if (option.name().equals(configName)) {
try {
PropertyEditor editor = PropertyEditor.class.newInstance();
editor.setAsText(configValue.toString());
Method method =
component
.getClass()
.getMethod(
"set"
+ Character.toUpperCase(f.getName().charAt(0))
+ f.getName().substring(1),
getClassForObject(editor.getValue()));
method.invoke(component, editor.getValue());
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
}
}
}
}
}
/**
* Returns all config options for the given component.
*
* @param component
* @return
*/
public static List<ConfigOption> getConfigOptions(Component component) {
return getConfigOptions(component.getClass());
}
