1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.shiro.guice.web;
20
21 import javax.servlet.*;
22 import java.io.IOException;
23 import java.util.Iterator;
24
25 class SimpleFilterChain implements FilterChain {
26
27
28 private final FilterChain originalChain;
29 private final Iterator<? extends Filter> chain;
30
31 private boolean originalCalled = false;
32
33 public SimpleFilterChain(FilterChain originalChain, Iterator<? extends Filter> chain) {
34 this.originalChain = originalChain;
35 this.chain = chain;
36 }
37
38 public void doFilter(ServletRequest request, ServletResponse response) throws IOException, ServletException {
39 if (chain.hasNext()) {
40 Filter filter = chain.next();
41 filter.doFilter(request, response, this);
42 } else if (!originalCalled) {
43 originalCalled = true;
44 originalChain.doFilter(request, response);
45 }
46 }
47
48 /**
49 * Exposed for testing, not part of public API.
50 * @return an Iterater of filters.
51 */
52 Iterator<? extends Filter> getFilters() {
53 return chain;
54 }
55
56 }