/*
* Copyright 2008-2011 Acciente, LLC
*
* Acciente, LLC licenses this file to you 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.acciente.induction.init;
import com.acciente.commons.lang.Strings;
import com.acciente.commons.reflect.ParameterProviderException;
import com.acciente.induction.dispatcher.model.ModelPool;
import com.acciente.induction.init.config.Config;
import com.acciente.induction.resolver.ShortURLViewResolver;
import com.acciente.induction.resolver.ViewResolver;
import com.acciente.induction.util.ConstructorNotFoundException;
import com.acciente.induction.util.ObjectFactory;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import javax.servlet.ServletConfig;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
/**
* Internal.
* This is helper class that focuses on setting up the view resolver used
* by the dispatcher servlet.
*
* @created Mar 30, 2009
*
* @author Adinath Raveendra Raj
*/
public class ViewResolverInitializer
{
public static ViewResolver getViewResolver( Config.ViewResolver oViewResolverConfig,
Config.ViewMapping oViewMappingConfig,
ModelPool oModelPool,
ClassLoader oClassLoader,
ServletConfig oServletConfig )
throws ClassNotFoundException, InvocationTargetException, ConstructorNotFoundException, ParameterProviderException, IllegalAccessException, InstantiationException, IOException
{
ViewResolver oViewResolver;
String sViewResolverClassName;
Log oLog;
oLog = LogFactory.getLog( ViewResolverInitializer.class );
sViewResolverClassName = oViewResolverConfig.getClassName();
if ( Strings.isEmpty( sViewResolverClassName ) )
{
oViewResolver = new ShortURLViewResolver( oViewMappingConfig, oClassLoader );
}
else
{
oLog.info( "loading user-defined view resolver: " + sViewResolverClassName );
Class oViewResolverClass = oClassLoader.loadClass( sViewResolverClassName );
// attempt to find and call the single public constructor
oViewResolver
= ( ViewResolver )
ObjectFactory.createObject( oViewResolverClass,
new Object[]{ oServletConfig,
oViewResolverConfig,
oViewMappingConfig,
oClassLoader },
new InitializerParameterProvider( oModelPool, "view-resolver-init" ) );
}
return oViewResolver;
}
}