public static boolean fieldTypeCompatible(FieldDeclaration declaration, Field field) {
if (declaration.getValue() != null) {
return field.getType().isAssignableFrom(declaration.getValue().getClass());
} else {
// Null can be set any field type
return true;
}
}
private static void applyFieldDeclaration(FieldDeclaration declaration, Object target) {
Method setterMethod =
ReflectUtil.getSetter(
declaration.getName(), target.getClass(), declaration.getValue().getClass());
if (setterMethod != null) {
try {
setterMethod.invoke(target, declaration.getValue());
} catch (IllegalArgumentException e) {
throw new ActivitiException(
"Error while invoking '"
+ declaration.getName()
+ "' on class "
+ target.getClass().getName(),
e);
} catch (IllegalAccessException e) {
throw new ActivitiException(
"Illegal acces when calling '"
+ declaration.getName()
+ "' on class "
+ target.getClass().getName(),
e);
} catch (InvocationTargetException e) {
throw new ActivitiException(
"Exception while invoking '"
+ declaration.getName()
+ "' on class "
+ target.getClass().getName(),
e);
}
} else {
Field field = ReflectUtil.getField(declaration.getName(), target);
if (field == null) {
throw new ActivitiException(
"Field definition uses unexisting field '"
+ declaration.getName()
+ "' on class "
+ target.getClass().getName());
}
// Check if the delegate field's type is correct
if (!fieldTypeCompatible(declaration, field)) {
throw new ActivitiException(
"Incompatible type set on field declaration '"
+ declaration.getName()
+ "' for class "
+ target.getClass().getName()
+ ". Declared value has type "
+ declaration.getValue().getClass().getName()
+ ", while expecting "
+ field.getType().getName());
}
ReflectUtil.setField(field, target, declaration.getValue());
}
}