001/* 002 * (C) Copyright 2006-2011 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * bstefanescu 018 */ 019package org.nuxeo.ecm.webengine.jaxrs.servlet; 020 021import java.util.Collections; 022import java.util.Enumeration; 023import java.util.List; 024 025import javax.servlet.Filter; 026import javax.servlet.FilterConfig; 027import javax.servlet.ServletConfig; 028import javax.servlet.ServletContext; 029import javax.servlet.ServletException; 030 031import org.nuxeo.ecm.webengine.jaxrs.BundleNotFoundException; 032import org.nuxeo.ecm.webengine.jaxrs.servlet.config.FilterDescriptor; 033import org.nuxeo.ecm.webengine.jaxrs.servlet.config.FilterSetDescriptor; 034import org.nuxeo.ecm.webengine.jaxrs.servlet.mapping.Path; 035 036/** 037 * A filter set is a collections of filters that should be run for a given request in a servlet context. 038 * <p> 039 * The filter set is selected when it match the current pathInfo of the request. Only one filter set can match a given 040 * path - the first one which is matching will be used, all the other filter sets defined by a servlet will be ignored. 041 * 042 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a> 043 */ 044public class FilterSet { 045 046 protected FilterSetDescriptor descriptor; 047 048 private Filter[] filters; 049 050 public FilterSet(FilterSetDescriptor descriptor) { 051 this.descriptor = descriptor; 052 } 053 054 public boolean matches(String pathInfo) { 055 return descriptor.matches(pathInfo); 056 } 057 058 public boolean matches(Path pathInfo) { 059 return descriptor.matches(pathInfo); 060 } 061 062 public Filter[] getFilters() { 063 return filters; 064 } 065 066 public void init(ServletConfig config) throws ServletException { 067 try { 068 List<FilterDescriptor> fds = descriptor.getFilters(); 069 filters = new Filter[fds.size()]; 070 for (int i = 0, len = fds.size(); i < len; i++) { 071 FilterDescriptor fd = fds.get(i); 072 Filter filter = fd.getFilter(); 073 filter.init(new FilterConfigAdapter(fd, config)); 074 filters[i] = filter; 075 } 076 } catch (ReflectiveOperationException | BundleNotFoundException e) { 077 throw new ServletException("Failed to initialize filter set", e); 078 } 079 } 080 081 public void destroy() { 082 for (Filter filter : filters) { 083 filter.destroy(); 084 } 085 descriptor = null; 086 filters = null; 087 } 088 089 static class FilterConfigAdapter implements FilterConfig { 090 protected final ServletConfig config; 091 092 protected final FilterDescriptor fd; 093 094 public FilterConfigAdapter(FilterDescriptor fd, ServletConfig config) { 095 this.fd = fd; 096 this.config = config; 097 } 098 099 @Override 100 public String getFilterName() { 101 return fd.getRawClassRef(); 102 } 103 104 @Override 105 public String getInitParameter(String key) { 106 return fd.getInitParams().get(key); 107 } 108 109 @Override 110 public Enumeration<String> getInitParameterNames() { 111 return Collections.enumeration(fd.getInitParams().keySet()); 112 } 113 114 @Override 115 public ServletContext getServletContext() { 116 return config.getServletContext(); 117 } 118 119 } 120 121}