SimpleFilterChainResolver.java
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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 org.apache.shiro.guice.web;
import java.util.Arrays;
import java.util.Iterator;
import java.util.Map;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import com.google.inject.Injector;
import com.google.inject.Key;
import org.apache.shiro.util.PatternMatcher;
import org.apache.shiro.web.filter.mgt.FilterChainResolver;
import org.apache.shiro.web.util.WebUtils;
class SimpleFilterChainResolver implements FilterChainResolver {
private final Map<String, Key<? extends Filter>[]> chains;
private final Injector injector;
private final PatternMatcher patternMatcher;
SimpleFilterChainResolver(Map<String, Key<? extends Filter>[]> chains, Injector injector, PatternMatcher patternMatcher) {
this.chains = chains;
this.injector = injector;
this.patternMatcher = patternMatcher;
}
public FilterChain getChain(ServletRequest request, ServletResponse response, final FilterChain originalChain) {
String path = WebUtils.getPathWithinApplication(WebUtils.toHttp(request));
for (final String pathPattern : chains.keySet()) {
if (patternMatcher.matches(pathPattern, path)) {
final Iterator<Key<? extends Filter>> chain = Arrays.asList(chains.get(pathPattern)).iterator();
return new SimpleFilterChain(originalChain, new Iterator<Filter>() {
public boolean hasNext() {
return chain.hasNext();
}
public Filter next() {
return injector.getInstance(chain.next());
}
public void remove() {
throw new UnsupportedOperationException();
}
});
}
}
return null;
}
}