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* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* 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.jboss.seam.examples.booking.inventory;
import java.util.ArrayList;
import java.util.List;
import javax.ejb.Stateful;
import javax.enterprise.context.SessionScoped;
import javax.enterprise.inject.Instance;
import javax.enterprise.inject.Produces;
import javax.inject.Inject;
import javax.inject.Named;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Root;
import org.jboss.solder.logging.Logger;
import org.jboss.seam.examples.booking.model.Hotel;
import org.jboss.seam.examples.booking.model.Hotel_;
import org.jboss.seam.international.status.builder.TemplateMessage;
/**
* @author <a href="http://community.jboss.org/people/dan.j.allen">Dan Allen</a>
*/
@Named
@Stateful
@SessionScoped
public class HotelSearch {
@Inject
private Logger log;
@PersistenceContext
private EntityManager em;
@Inject
private SearchCriteria criteria;
@Inject
private Instance<TemplateMessage> messageBuilder;
private boolean nextPageAvailable = false;
private List<Hotel> hotels = new ArrayList<Hotel>();
public void find() {
criteria.firstPage();
queryHotels(criteria);
}
public void nextPage() {
criteria.nextPage();
queryHotels(criteria);
}
public void previousPage() {
criteria.previousPage();
queryHotels(criteria);
}
@Produces
@Named
public List<Hotel> getHotels() {
return hotels;
}
public boolean isNextPageAvailable() {
return nextPageAvailable;
}
public boolean isPreviousPageAvailable() {
return criteria.getPage() > 0;
}
private void queryHotels(final SearchCriteria criteria) {
CriteriaBuilder builder = em.getCriteriaBuilder();
CriteriaQuery<Hotel> cquery = builder.createQuery(Hotel.class);
Root<Hotel> hotel = cquery.from(Hotel.class);
// QUESTION can like create the pattern for us?
cquery.select(hotel).where(
builder.or(builder.like(builder.lower(hotel.get(Hotel_.name)), criteria.getSearchPattern()),
builder.like(builder.lower(hotel.get(Hotel_.city)), criteria.getSearchPattern()),
builder.like(builder.lower(hotel.get(Hotel_.zip)), criteria.getSearchPattern()),
builder.like(builder.lower(hotel.get(Hotel_.address)), criteria.getSearchPattern())));
List<Hotel> results = em.createQuery(cquery).setMaxResults(criteria.getFetchSize())
.setFirstResult(criteria.getFetchOffset()).getResultList();
nextPageAvailable = results.size() > criteria.getPageSize();
if (nextPageAvailable) {
// NOTE create new ArrayList since subList creates unserializable list
hotels = new ArrayList<Hotel>(results.subList(0, criteria.getPageSize()));
} else {
hotels = results;
}
log.info(messageBuilder.get().text("Found {0} hotel(s) matching search term [ {1} ] (limit {2})")
.textParams(hotels.size(), criteria.getQuery(), criteria.getPageSize()).build().getText());
}
}