/*
* JBoss, Home of Professional Open Source.
* Copyright 2011, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.capedwarf.server.api.cache;
import org.jboss.capedwarf.jpa.Entity;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* Cache only entity ids.
*
* @author <a href="mailto:ales.justin@jboss.org">Ales Justin</a>
*/
public abstract class EntityListCachedResult implements Serializable {
private static final long serialVersionUID = 1l;
private List<Long> ids;
protected static List<Long> toIds(List<? extends Entity> entities) {
if (entities == null || entities.isEmpty())
return Collections.emptyList();
List<Long> ids = new ArrayList<Long>();
for (Entity e : entities)
ids.add(e.getId());
return ids;
}
protected EntityListCachedResult(List<Long> ids) {
if (ids == null)
ids = Collections.emptyList();
this.ids = ids;
}
public List<Long> getIds() {
return ids;
}
}