/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.server.dispatch;
import com.caucho.servlet.comet.CometFilter;
import com.caucho.servlet.comet.CometFilterChain;
import com.caucho.util.L10N;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import java.util.ArrayList;
import java.util.logging.Logger;
/**
* Manages dispatching: servlets and filters.
*/
public class FilterMapper {
private static final Logger log
= Logger.getLogger(FilterMapper.class.getName());
private static final L10N L = new L10N(FilterMapper.class);
private ServletContext _servletContext;
private int _unique;
private FilterManager _filterManager;
private ArrayList<FilterMapping> _filterMap
= new ArrayList<FilterMapping>();
private ArrayList<FilterChainBuilder> _topFilters
= new ArrayList<FilterChainBuilder>();
private ArrayList<FilterChainBuilder> _bottomFilters
= new ArrayList<FilterChainBuilder>();
/**
* Sets the servlet context.
*/
public void setServletContext(ServletContext servletContext)
{
_servletContext = servletContext;
}
/**
* Gets the servlet context.
*/
public ServletContext getServletContext()
{
return _servletContext;
}
/**
* Returns the filter manager.
*/
public FilterManager getFilterManager()
{
return _filterManager;
}
/**
* Sets the filter manager.
*/
public void setFilterManager(FilterManager manager)
{
_filterManager = manager;
}
/**
* Adds a filter mapping
*/
public void addFilterMapping(FilterMapping mapping)
throws ServletException
{
try {
String filterName = mapping.getFilterName();
if (filterName == null)
filterName = mapping.getFilterClassName();
if (mapping.getFilterClassName() != null
&& _filterManager.getFilter(filterName) == null) {
_filterManager.addFilter(mapping);
}
if (_filterManager.getFilter(filterName) == null)
throw new ServletConfigException(L.l("'{0}' is an unknown filter-name. filter-mapping requires that the named filter be defined in a <filter> configuration before the <filter-mapping>.", filterName));
_filterMap.add(mapping);
log.fine("filter-mapping " + mapping + " -> " + filterName);
} catch (ServletException e) {
throw e;
} catch (Exception e) {
throw new ServletException(e);
}
}
/**
* Adds a top-filter. Top filters are added to every request
* in the filter chain.
*/
public void addTopFilter(FilterChainBuilder filterBuilder)
{
_topFilters.add(filterBuilder);
}
/**
* Fills in the invocation.
*/
public FilterChain buildDispatchChain(Invocation invocation,
FilterChain chain)
throws ServletException
{
synchronized (_filterMap) {
for (int i = _filterMap.size() - 1; i >= 0; i--) {
FilterMapping map = _filterMap.get(i);
if (map.isMatch(invocation.getServletName())) {
String filterName = map.getFilterName();
Filter filter = _filterManager.createFilter(filterName);
FilterConfigImpl config = _filterManager.getFilter(filterName);
if (! config.isAsyncSupported())
invocation.clearAsyncSupported();
chain = addFilter(chain, filter);
}
}
}
synchronized (_filterMap) {
for (int i = _filterMap.size() - 1; i >= 0; i--) {
FilterMapping map = _filterMap.get(i);
if (map.isMatch(invocation)) {
String filterName = map.getFilterName();
Filter filter = _filterManager.createFilter(filterName);
FilterConfigImpl config = _filterManager.getFilter(filterName);
if (! config.isAsyncSupported())
invocation.clearAsyncSupported();
chain = addFilter(chain, filter);
}
}
}
for (int i = 0; i < _topFilters.size(); i++) {
FilterChainBuilder filterBuilder;
filterBuilder = _topFilters.get(i);
chain = filterBuilder.build(chain, invocation);
}
invocation.setFilterChain(chain);
return chain;
}
/**
* Fills in the invocation.
*/
public FilterChain buildFilterChain(FilterChain chain,
String servletName)
throws ServletException
{
synchronized (_filterMap) {
for (int i = _filterMap.size() - 1; i >= 0; i--) {
FilterMapping map = _filterMap.get(i);
if (map.isMatch(servletName)) {
String filterName = map.getFilterName();
Filter filter = _filterManager.createFilter(filterName);
chain = addFilter(chain, filter);
}
}
}
return chain;
}
private FilterChain addFilter(FilterChain chain,
Filter filter)
{
return new FilterFilterChain(chain, filter);
}
}