/*
* 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.dispatcher.interceptor;
import com.acciente.commons.reflect.ParameterProvider;
import com.acciente.commons.reflect.ParameterProviderException;
import com.acciente.induction.controller.Form;
import com.acciente.induction.controller.HTMLForm;
import com.acciente.induction.controller.HttpRequest;
import com.acciente.induction.controller.HttpResponse;
import com.acciente.induction.controller.Request;
import com.acciente.induction.controller.Response;
import com.acciente.induction.dispatcher.model.ModelPool;
import com.acciente.induction.init.config.Config;
import com.acciente.induction.resolver.ControllerResolver;
import com.acciente.induction.resolver.ViewResolver;
import com.acciente.induction.template.TemplatingEngine;
import com.acciente.induction.util.ConstructorNotFoundException;
import com.acciente.induction.util.MethodNotFoundException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.lang.reflect.InvocationTargetException;
/**
* Internal.
* This class handles the resolution of parameter values used for injection into request interceptor methods.
*
* @created Oct 20, 2009
*
* @author Adinath Raveendra Raj
*/
public class RequestInterceptorParameterProviderFactory
{
private ModelPool _oModelPool;
private Config.FileUpload _oFileUploadConfig;
private TemplatingEngine _oTemplatingEngine;
private ClassLoader _oClassLoader;
public RequestInterceptorParameterProviderFactory( ModelPool oModelPool,
Config.FileUpload oFileUploadConfig,
TemplatingEngine oTemplatingEngine,
ClassLoader oClassLoader )
{
_oModelPool = oModelPool;
_oFileUploadConfig = oFileUploadConfig;
_oTemplatingEngine = oTemplatingEngine;
_oClassLoader = oClassLoader;
}
public RequestInterceptorParameterProvider getParameterProvider( HttpServletRequest oRequest,
HttpServletResponse oResponse,
ControllerResolver.Resolution oControllerResolution,
ViewResolver.Resolution oViewResolution )
{
return new RequestInterceptorParameterProvider( oRequest, oResponse, oControllerResolution, oViewResolution );
}
private class RequestInterceptorParameterProvider implements ParameterProvider
{
private HttpServletRequest _oRequest;
private HttpServletResponse _oResponse;
private ControllerResolver.Resolution _oControllerResolution;
private ViewResolver.Resolution _oViewResolution;
private RequestInterceptorParameterProvider( HttpServletRequest oRequest,
HttpServletResponse oResponse,
ControllerResolver.Resolution oControllerResolution,
ViewResolver.Resolution oViewResolution )
{
_oRequest = oRequest;
_oResponse = oResponse;
_oControllerResolution = oControllerResolution;
_oViewResolution = oViewResolution;
}
public Object getParameter( Class oParamClass ) throws ParameterProviderException
{
final String sMessagePrefix = "request-interceptor-parameter-provider: error resolving value for type: ";
try
{
Object oParamValue = null;
boolean bNullParamValid = false;
if ( oParamClass.isAssignableFrom( Request.class ) )
{
oParamValue = new HttpRequest( _oRequest );
}
else if ( oParamClass.isAssignableFrom( Response.class ) )
{
oParamValue = new HttpResponse( _oResponse );
}
else if ( oParamClass.isAssignableFrom( Form.class ) )
{
oParamValue = _oModelPool.getSystemModel( oParamClass, _oRequest );
}
else if ( oParamClass.isAssignableFrom( HttpServletRequest.class ) )
{
oParamValue = _oRequest;
}
else if ( oParamClass.isAssignableFrom( HttpServletResponse.class ) )
{
oParamValue = _oResponse;
}
else if ( oParamClass.isAssignableFrom( ControllerResolver.Resolution.class ) )
{
oParamValue = _oControllerResolution;
bNullParamValid = true;
}
else if ( oParamClass.isAssignableFrom( ViewResolver.Resolution.class ) )
{
oParamValue = _oViewResolution;
bNullParamValid = true;
}
else if ( oParamClass.isAssignableFrom( TemplatingEngine.class ) )
{
oParamValue = _oTemplatingEngine;
}
else if ( oParamClass.isAssignableFrom( ClassLoader.class ) )
{
oParamValue = _oClassLoader;
}
else
{
// check to see if this is a model class
oParamValue = _oModelPool.getModel( oParamClass, _oRequest );
}
if ( oParamValue == null && ! bNullParamValid )
{
throw ( new ParameterProviderException( sMessagePrefix + oParamClass ) );
}
return oParamValue;
}
catch ( MethodNotFoundException e )
{ throw new ParameterProviderException( sMessagePrefix + oParamClass, e ); }
catch ( InvocationTargetException e )
{ throw new ParameterProviderException( sMessagePrefix + oParamClass, e ); }
catch ( ClassNotFoundException e )
{ throw new ParameterProviderException( sMessagePrefix + oParamClass, e ); }
catch ( ConstructorNotFoundException e )
{ throw new ParameterProviderException( sMessagePrefix + oParamClass, e ); }
catch ( IllegalAccessException e )
{ throw new ParameterProviderException( sMessagePrefix + oParamClass, e ); }
catch ( InstantiationException e )
{ throw new ParameterProviderException( sMessagePrefix + oParamClass, e ); }
}
}
}