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Регистрация: 10.09.2010
Сообщений: 53
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Не обновляется мапа
26.12.2010, 00:32. Показов 1104. Ответов 2
[quote="D.o.c.t.o.r"]Когда ищу через метод findItemGroupByDesccription в моём FileDAO ArrayList, который идет возвращаемым параметром, содержит всего один элемент - последний добавленный, тобишь не добавляет в себя новых элементов, а замещает старый.Никак не пойму почему. Не обновляется Map'а в 75й строчке второго блока кода.
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| public class CMain
{
public static void main(String[] args)
{
Category category = new Category("Books");
ItemGroup ig1 = new ItemGroup("Garry Potter","Book of Garry Potter", BigDecimal.valueOf(100),category,true);
ItemGroup ig2 = new ItemGroup("Garry Potter 2","Book of Garry Potter",BigDecimal.valueOf(100),category,true);
ItemGroup ig3 = new ItemGroup("Garry Potter 3","Book of Garry Potter",BigDecimal.valueOf(100),category,true);
DAO dao = DAOFactory.getDAO();
try
{
dao.save(category);
dao.save(ig1);
dao.save(ig2);
dao.save(ig3);
}
catch(Exception e)
{
e.printStackTrace();
}
ArrayList al;
al = dao.findItemGroupByDescription("Book");
System.out.println(al);
}
} |
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| package core.dao;
import core.entity.*;
import core.session.SessionManager;
import util.FileUtils;
import util.SerializationUtil;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
public class FileDAO extends MemoryDAO
{
private static final String baseDir = "./files/";
private static final String userLiteral = "users/";
private static final String categoryLiteral = "categories/";
private static final String itemLiteral = "items/";
private static final String itemGroupLiteral = "itemGroups/";
private static final String orderLiteral = "orders/";
private static Map map;
private static final FileDAO INSTANCE = new FileDAO();
private FileDAO() {}
@Override
public void save(AbstractEntity entity) throws Exception
{
byte[] bytes;
SerializationUtil su = new SerializationUtil();
FileOutputStream fos = null;
String path;
// super.save(entity);
// Проверка для пользователя на уникальность login'а
if (entity instanceof User)
{
User user = findUserByLogin(((User) entity).getLogin());
if (user == null)
user = new User("temp@temp.temp","temp","temp");
if (SessionManager.getInstance().getCurrentUser() == null)
{
if (user.getLogin().equals(((User) entity).getLogin()))
throw new RuntimeException("User whith the same login already exist");
}
// Сохраняем в базу данных
map = getDatabaseMap(0);
if (map == null)
map = new HashMap();
map.put(((User) entity).getLogin(),entity.getId());
saveDatabaseMap(map,0);
}
if (entity instanceof Category)
{
map = getDatabaseMap(1);
if (map == null)
map = new HashMap();
map.put(((Category) entity).getName(),entity.getId());
saveDatabaseMap(map,1);
}
if (entity instanceof ItemGroup)
{
map = getDatabaseMap(2);
if (map == null)
map = new HashMap();
map.put(((ItemGroup) entity).getName(),entity.getId());
saveDatabaseMap(map,2);
// Почему-то мапа здесь не обновляется
map = getDatabaseMap(3);
if (map == null)
map = new HashMap();
map.put(((ItemGroup) entity).getDescription(),entity.getId());
saveDatabaseMap(map,3);
}
// Сохраняем сущность в файл
String literal = getEntityLiteral(entity.getClass());
path = baseDir + literal + entity.getId() + ".txt";
File file = new File(path);
file.createNewFile();
bytes = su.serialize(entity);
fos = new FileOutputStream(path);
fos.write(bytes);
fos.close();
}
@Override
public void remove(AbstractEntity entity)
{
super.remove(entity);
String literal = getEntityLiteral(entity.getClass());
String path = baseDir + literal + entity.getId() + ".txt";
File file = new File(path);
if (file.exists())
{
file.delete();
}
if (entity instanceof User)
{
map = getDatabaseMap(0);
map.remove(((User) entity).getLogin());
saveDatabaseMap(map,0);
}
if (entity instanceof Category)
{
map = getDatabaseMap(1);
map.remove(((Category) entity).getName());
saveDatabaseMap(map,1);
}
if (entity instanceof Item)
{
map = getDatabaseMap(2);
map.remove(((Item) entity).getItemGroup().getName());
saveDatabaseMap(map,2);
map = getDatabaseMap(3);
map.remove(((Item) entity).getItemGroup().getDescription());
saveDatabaseMap(map,3);
}
}
@Override
public AbstractEntity findById(long id, Class objectClass)
{
return loadAbstarctEntity(objectClass,id);
}
@Override
public User findUserByLogin(String login)
{
map = getDatabaseMap(0);
if (map != null)
{
Iterator it = map.entrySet().iterator();
while (it.hasNext())
{
Map.Entry pairs = (Map.Entry)it.next();
if (pairs.getKey().equals(login))
{
User user = (User) findById((Long) pairs.getValue(),User.class);
return user;
}
}
}
return null;
}
@Override
public ArrayList findItemGroupByName(String name)
{
ArrayList al = new ArrayList();
map = getDatabaseMap(2);
Iterator it = map.entrySet().iterator();
while (it.hasNext())
{
Map.Entry pairs = (Map.Entry)it.next();
String currentName = (String) pairs.getKey();
if (currentName.contains(name))
{
ItemGroup currentItemGroup = (ItemGroup) findById((Long)pairs.getValue(),ItemGroup.class);
al.add(currentItemGroup);
}
}
return al;
}
@Override
public ArrayList findItemGroupByDescription(String description)
{
ArrayList al = new ArrayList();
map = getDatabaseMap(3);
Iterator it = map.entrySet().iterator();
while (it.hasNext())
{
Map.Entry pairs = (Map.Entry)it.next();
String currentDescription = (String) pairs.getKey();
if (currentDescription.contains(description))
{
ItemGroup currentItemGroup = (ItemGroup) findById((Long)pairs.getValue(),ItemGroup.class);
al.add(currentItemGroup);
}
}
return al;
// map = getDatabaseMap(3);
// ArrayList al = new ArrayList();
// Iterator it = map.values().iterator();
// while (it.hasNext())
// {
// Item item = (Item) it.next();
// if (item.getItemGroup().getDescription().contains(description))
// {
// al.add(item);
// }
// }
// return al;
}
@Override
public Category findCategoryByName(String name)
{
map = getDatabaseMap(1);
Iterator it = map.entrySet().iterator();
while (it.hasNext())
{
Map.Entry pairs = (Map.Entry)it.next();
String currentName = (String) pairs.getKey();
if (currentName.equals(name))
{
Category category = (Category) pairs.getValue();
return category;
}
}
return null;
}
private <T extends AbstractEntity> T loadAbstarctEntity(Class<T> entityClass, long id)
{
SerializationUtil su = new SerializationUtil();
String literal = getEntityLiteral(entityClass);
File file = new File(baseDir + literal + id + ".txt");
byte[] bytes;
if (file.exists())
{
try
{
bytes = FileUtils.getBytesFromFile(file);
return (T) su.deserialize(bytes);
}
catch (Exception e)
{
e.printStackTrace();
}
}
return null;
}
private String getEntityLiteral(Class entityClass)
{
if (User.class.equals(entityClass))
{
return userLiteral;
}
if (Category.class.equals(entityClass))
{
return categoryLiteral;
}
if (Item.class.equals(entityClass))
{
return itemLiteral;
}
if (ItemGroup.class.equals(entityClass))
{
return itemGroupLiteral;
}
if (Order.class.equals(entityClass))
{
return orderLiteral;
}
return null;
}
private String getLiteralOfDatabase(int numberOfDatabase)
{
if (numberOfDatabase == 0)
{
return baseDir + "/database/" + "userLogin.txt";
}
if (numberOfDatabase == 1)
{
return baseDir + "/database/" + "categoryName.txt";
}
if (numberOfDatabase == 2)
{
return baseDir + "/database/" + "itemGroupName.txt";
}
if (numberOfDatabase == 3)
{
return baseDir + "/database/" + "itemGroupDescription.txt";
}
return null;
}
private Map getDatabaseMap(int numberOfDatabase)
{
String path = "";
File file;
byte[] bytes;
SerializationUtil su = new SerializationUtil();
path = getLiteralOfDatabase(numberOfDatabase);
file = new File(path);
if (file.exists())
{
try
{
bytes = FileUtils.getBytesFromFile(file);
map = (Map) su.deserialize(bytes);
return map;
}
catch (Exception e)
{
e.printStackTrace();
}
}
return null;
}
private void saveDatabaseMap(Map map, int numberOfDatabase)
{
String path;
SerializationUtil su = new SerializationUtil();
File file;
FileOutputStream fos = null;
ObjectOutputStream oos = null;
byte[] bytes;
path = getLiteralOfDatabase(numberOfDatabase);
file = new File(path);
if (!file.exists())
try {
file.createNewFile();
} catch (IOException e) {
e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates.
}
try
{
fos = new FileOutputStream(file);
oos = new ObjectOutputStream(fos);
oos.writeObject(map);
}
catch (Exception e)
{
e.printStackTrace();
}
finally
{
try
{
fos.close();
oos.close();
}
catch(IOException e)
{
e.printStackTrace();
}
}
}
public static FileDAO getInstance()
{
return INSTANCE;
}
} |
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