org.wicketopia.domdrides.model.LoadableDetachableEntityModel Maven / Gradle / Ivy
/*
* Copyright (c) 2011 Carman Consulting, Inc.
*
* 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.wicketopia.domdrides.model;
import org.apache.wicket.model.LoadableDetachableModel;
import org.domdrides.entity.Entity;
import org.domdrides.repository.Repository;
import java.io.Serializable;
/**
* An implementation of {@link org.apache.wicket.model.LoadableDetachableModel} which loads an entity from a {@link org.domdrides.repository.Repository}.
*
* @since 1.1
*/
public class LoadableDetachableEntityModel, IdType extends Serializable> extends
LoadableDetachableModel
{
//----------------------------------------------------------------------------------------------------------------------
// Fields
//----------------------------------------------------------------------------------------------------------------------
private static final long serialVersionUID = 1L;
private final Repository repository;
private final IdType id;
//----------------------------------------------------------------------------------------------------------------------
// Constructors
//----------------------------------------------------------------------------------------------------------------------
/**
* Creates a model that lazily loads an entity by id from the specified repository.
* @param repository the repository
* @param id the id
*/
public LoadableDetachableEntityModel(Repository repository, IdType id)
{
this.repository = repository;
this.id = id;
}
/**
* Creates a model pre-loaded with the specified entity.
* @param repository the repository
* @param entity the entity
*/
public LoadableDetachableEntityModel(Repository repository, EntityType entity)
{
super(entity);
this.repository = repository;
this.id = entity.getId();
}
//----------------------------------------------------------------------------------------------------------------------
// Other Methods
//----------------------------------------------------------------------------------------------------------------------
/**
* Loads the entity from the repository.
*
* @return the entity
*/
protected EntityType load()
{
return repository.getById(id);
}
}