/*
* Copyright 2010 Lincoln Baxter, III
*
* 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 com.ocpsoft.pretty.faces.config;
import javax.servlet.ServletContext;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.ocpsoft.common.services.ServiceLoader;
import com.ocpsoft.pretty.PrettyContext;
import com.ocpsoft.pretty.PrettyException;
import com.ocpsoft.pretty.faces.config.dynaview.DynaviewEngine;
import com.ocpsoft.pretty.faces.config.servlet.WebXmlParser;
import com.ocpsoft.pretty.faces.config.spi.ParentingPostProcessor;
import com.ocpsoft.pretty.faces.config.spi.ValidatingPostProcessor;
import com.ocpsoft.pretty.faces.spi.ConfigurationPostProcessor;
import com.ocpsoft.pretty.faces.spi.ConfigurationProvider;
/**
* @author <a href="mailto:lincolnbaxter@gmail.com>Lincoln Baxter, III</a>
* @author Aleksei Valikov
*/
public class PrettyConfigurator
{
private static final Log log = LogFactory.getLog(PrettyConfigurator.class);
private final ServletContext servletContext;
private final WebXmlParser webXmlParser = new WebXmlParser();
private final DynaviewEngine dynaview = new DynaviewEngine();
private PrettyConfig config;
public PrettyConfigurator(final ServletContext servletContext)
{
this.servletContext = servletContext;
}
public void configure()
{
try
{
final PrettyConfigBuilder builder = new PrettyConfigBuilder();
ServiceLoader<ConfigurationProvider> configLoader = ServiceLoader.load(ConfigurationProvider.class);
for (ConfigurationProvider p : configLoader)
{
builder.addFromConfig(p.loadConfiguration(servletContext));
}
config = builder.build();
config.setDynaviewId(getFacesDynaViewId());
/*
* Do the built-in post-processing manually to ensure ordering
*/
ConfigurationPostProcessor parenting = new ParentingPostProcessor();
config = parenting.processConfiguration(servletContext, config);
ServiceLoader<ConfigurationPostProcessor> postProcessors = ServiceLoader.load(ConfigurationPostProcessor.class);
for (ConfigurationPostProcessor p : postProcessors)
{
config = p.processConfiguration(servletContext, config);
}
ConfigurationPostProcessor validating = new ValidatingPostProcessor();
config = validating.processConfiguration(servletContext, config);
log.trace("Setting config into ServletContext");
servletContext.setAttribute(PrettyContext.CONFIG_KEY, config);
}
catch (Exception e)
{
throw new PrettyException("Failed to load configuration.", e);
}
}
private String getFacesDynaViewId()
{
try
{
webXmlParser.parse(servletContext);
return dynaview.buildDynaViewId(webXmlParser.getFacesMapping());
}
catch (Exception e)
{
throw new PrettyException("Could not retrieve DynaViewId.", e);
}
}
public PrettyConfig getConfig()
{
return config;
}
}