// Copyright 2007, 2008 The Apache Software Foundation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package org.apache.tapestry5.integration.app1.services;
import org.apache.tapestry5.integration.app1.data.ToDoItem;
import org.apache.tapestry5.integration.app1.data.Urgency;
import org.apache.tapestry5.ioc.internal.util.CollectionFactory;
import static org.apache.tapestry5.ioc.internal.util.CollectionFactory.newList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
/**
* We clone everything that comes in or goes out. This does a reasonable job of simulating an external database. We just
* use cloned copies of objects to represent data that's been marshalled into tables and columns.
*/
public class ToDoDatabaseImpl implements ToDoDatabase
{
private long nextId = 1000;
private final Map<Long, ToDoItem> items = CollectionFactory.newMap();
public ToDoDatabaseImpl()
{
// A couple of items to get us started:
reset();
}
public void clear()
{
items.clear();
}
public void reset()
{
items.clear();
add("End World Hunger", Urgency.MEDIUM, 1);
add("Develop Faster-Than-Light Travel", Urgency.HIGH, 2);
add("Cure Common Cold", Urgency.LOW, 3);
}
private void add(String title, Urgency urgency, int order)
{
ToDoItem item = new ToDoItem();
item.setTitle(title);
item.setUrgency(urgency);
item.setOrder(order);
add(item);
}
public void add(ToDoItem item)
{
long id = nextId++;
item.setId(id);
items.put(id, item.clone());
}
public List<ToDoItem> findAll()
{
List<ToDoItem> result = newList();
for (ToDoItem item : items.values())
result.add(item.clone());
Comparator<ToDoItem> comparator = new Comparator<ToDoItem>()
{
public int compare(ToDoItem o1, ToDoItem o2)
{
return o1.getOrder() - o2.getOrder();
}
};
Collections.sort(result, comparator);
return result;
}
public void update(ToDoItem item)
{
long id = item.getId();
if (!items.containsKey(id))
throw new RuntimeException(String.format("ToDoItem #%d not found.", id));
items.put(id, item.clone());
}
public void remove(long itemId)
{
ToDoItem item = items.remove(itemId);
if (item == null)
throw new RuntimeException(String.format("ToDoItem #%d not found.", itemId));
}
public ToDoItem get(long itemId)
{
ToDoItem item = items.get(itemId);
return item == null ? null : item.clone();
}
}