/*
    * 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.Collections;
  import java.util.HashSet;
  import java.util.Map;
  import java.util.Set;
  
  import javax.servlet.Filter;
  
  import com.google.inject.Inject;
  import com.google.inject.Injector;
  import com.google.inject.Key;
  import com.google.inject.Singleton;
  import com.google.inject.spi.Dependency;
  import com.google.inject.spi.ProviderWithDependencies;
  
  import org.apache.shiro.util.AntPathMatcher;
  import org.apache.shiro.util.PatternMatcher;
  import org.apache.shiro.web.filter.mgt.FilterChainResolver;
  
  @Singleton
  class FilterChainResolverProvider implements ProviderWithDependencies<FilterChainResolver> {
      @Inject
      Injector injector;
  
      private final Map<String, Key<? extends Filter>[]> chains;
  
      private final Set<Dependency<?>> dependencies;
  
      private PatternMatcher patternMatcher = new AntPathMatcher();
  
      public FilterChainResolverProvider(Map<String, Key<? extends Filter>[]> chains) {
          this.chains = chains;
          Set<Dependency<?>> dependenciesBuilder = new HashSet<Dependency<?>>();
          for (String chain : chains.keySet()) {
              for (Key<? extends Filter> filterKey : chains.get(chain)) {
                  dependenciesBuilder.add(Dependency.get(filterKey));
              }
          }
          this.dependencies = Collections.unmodifiableSet(dependenciesBuilder);
      }
  
      @Inject(optional = true)
      public void setPatternMatcher(PatternMatcher patternMatcher) {
          this.patternMatcher = patternMatcher;
      }
  
      public Set<Dependency<?>> getDependencies() {
          return dependencies;
      }
  
      public FilterChainResolver get() {
          return new SimpleFilterChainResolver(chains, injector, patternMatcher);
      }
  
  }