hw09-SelfmadeORM - #12
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petrelevich
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Feb 9, 2021
| import java.util.List; | ||
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| public class EntityClassMetaDataImpl<T> implements EntityClassMetaData <T>{ | ||
| T objectData; |
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| @Override | ||
| public String getName() { | ||
| return Arrays.stream(objectData.getClass().getName().toLowerCase().split("\\.")).reduce((first, second)->second).get(); |
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попробуйте:
EntityClassMetaDataImpl.class.getSimpleName()
| return field; | ||
| } | ||
| } | ||
| return null; |
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лучше исключение выбрасывать вместо null.
Тем более, что не везде есть обработка null,
например, как этот фрагмент отработает ?
public List<Field> getAllFields() {
List<Field> fields = new ArrayList<>();
fields.add(getIdField());
fields.addAll(getFieldsWithoutId());
return fields;
}
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| @Override | ||
| public Constructor<T> getConstructor() { | ||
| return null; |
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почему тут вместо констуктора null ?
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| public class EntitySQLMetaDataImpl implements EntitySQLMetaData { | ||
| Class<?> clazz; | ||
| EntityClassMetaData entityClassMetaData; |
| List<Field> fieldsList = entityClassMetaData.getFieldsWithoutId(); | ||
| Iterator<Field> fieldListIterator = fieldsList.iterator(); | ||
| while (fieldListIterator.hasNext()){ | ||
| stringSelectByIdSql = stringSelectByIdSql + fieldListIterator.next().getName() + ", "; |
| id, rs -> { | ||
| try { | ||
| if (rs.next()) { | ||
| Constructor<T> constructorT = clazz.getConstructor(new Class<?>[]{}); |
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тут бы пригодился метод
public Constructor<T> getConstructor()
который null возвращает.
| for (Field field : clazz.getDeclaredFields()) { | ||
| boolean access = field.canAccess(resultT); | ||
| field.setAccessible(true); | ||
| field.set(resultT, getValue(rs, field)); |
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функционал "получить значение поля", "установить значение поля" лучше в отдельные методы вынести.
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