/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.wicket.examples.repeater;
import org.apache.wicket.model.LoadableDetachableModel;
/**
* detachable model for an instance of contact
*
* @author igor
*
*/
public class DetachableContactModel extends LoadableDetachableModel<Contact>
{
private final long id;
protected ContactsDatabase getContactsDB()
{
return DatabaseLocator.getDatabase();
}
/**
* @param c
*/
public DetachableContactModel(Contact c)
{
this(c.getId());
}
/**
* @param id
*/
public DetachableContactModel(long id)
{
if (id == 0)
{
throw new IllegalArgumentException();
}
this.id = id;
}
@Override
public int hashCode()
{
return Long.valueOf(id).hashCode();
}
/**
* used for dataview with ReuseIfModelsEqualStrategy item reuse strategy
*
* @see org.apache.wicket.markup.repeater.ReuseIfModelsEqualStrategy
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(final Object obj)
{
if (obj == this)
{
return true;
}
else if (obj == null)
{
return false;
}
else if (obj instanceof DetachableContactModel)
{
DetachableContactModel other = (DetachableContactModel)obj;
return other.id == id;
}
return false;
}
/**
* @see org.apache.wicket.model.LoadableDetachableModel#load()
*/
@Override
protected Contact load()
{
// loads contact from the database
return getContactsDB().get(id);
}
}