/***
* Copyright (c) 2011 Caelum - www.caelum.com.br/opensource
* All rights reserved.
*
* 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 br.com.caelum.vraptor.plugin.hibernate4;
import java.net.URL;
import javax.annotation.PostConstruct;
import org.hibernate.cfg.Configuration;
import br.com.caelum.vraptor.environment.Environment;
import br.com.caelum.vraptor.ioc.ApplicationScoped;
import br.com.caelum.vraptor.ioc.Component;
import br.com.caelum.vraptor.ioc.ComponentFactory;
import br.com.caelum.vraptor.ioc.Container;
/**
* Creates a Hibernate {@link Configuration}, once when application starts.
*
* @author Otávio Scherer Garcia
*/
@Component
@ApplicationScoped
public class ConfigurationCreator
implements ComponentFactory<Configuration> {
private Configuration cfg;
private Container container;
public ConfigurationCreator(Container container) {
this.container = container;
}
/**
* Create a new instance for {@link Configuration}, and after call the
* {@link ConfigurationCreator#configureExtras()} method, that you can override to configure extra guys.
* If vraptor-environment is available on classpath, this method will use then to locate hibernate cfg
* file.
*/
@PostConstruct
public void create() {
cfg = new Configuration().configure(getHibernateCfgLocation());
configureExtras();
}
protected URL getHibernateCfgLocation() {
if (isEnvironmentAvailable()) {
Environment env = container.instanceFor(Environment.class);
return env.getResource(getHibernateCfgName());
}
return getClass().getResource(getHibernateCfgName());
}
protected String getHibernateCfgName() {
return "/hibernate.cfg.xml";
}
protected boolean isEnvironmentAvailable() {
try {
Class.forName("br.com.caelum.vraptor.environment.Environment");
return true;
} catch (ClassNotFoundException e) {
return false;
}
}
/**
* This method can override if you want to configure more things.
*/
public void configureExtras() {
}
public Configuration getInstance() {
return cfg;
}
}