/**
* Note: Does test for plural form of fieldName, e.g. when the field is a collection
*
* @param objClass
* @param fieldName
* @return
*/
public static boolean isFieldACollection(Class objClass, String fieldName) {
boolean isCollection = false;
Class fieldClass;
Field field = ReflectionHelper.findField(objClass, fieldName);
if (field != null) {
fieldClass = field.getType();
if (isCollection(fieldClass)) {
isCollection = true;
}
}
return isCollection;
}
/**
* Given an object, its class and the name of a field on that object, try to deduce the field's
* Class. Note: Does test for plural form of fieldName, e.g. when the field is a collection
*
* @param obj
* @param fieldName
* @return
*/
public static Class determineClass(Object obj, Class objClass, String fieldName)
throws ToolkitException {
Class fieldClass;
Field field = ReflectionHelper.findField(objClass, fieldName);
if (field != null) {
fieldClass = field.getType();
if (Collection.class.isAssignableFrom(fieldClass)) {
// This is why we require an indexed getter for our collections so we can determine the
// return type
Method method = findMethod(objClass, "get" + fieldName, int.class);
if (method != null) {
fieldClass = method.getReturnType();
} else {
throw new ToolkitException(
"Can not determine class of Collection field '"
+ fieldName
+ "' in "
+ obj.getClass().getName()
+ "; perhaps there is no indexed getter?");
}
}
} else {
throw new ToolkitException(
"No such field '" + fieldName + "' in " + obj.getClass().getName());
}
return fieldClass;
}