/*
    * 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.web.filter.mgt;
  
  import org.apache.shiro.util.StringUtils;
  import org.apache.shiro.web.servlet.ProxiedFilterChain;
  
  import javax.servlet.Filter;
  import javax.servlet.FilterChain;
  import java.util.*;
  
  /**
   * Simple {@code NamedFilterList} implementation that is supported by a backing {@link List} instance and a simple
   * {@link #getName() name} property. All {@link List} method implementations are immediately delegated to the
   * wrapped backing list.
   *
   * @since 1.0
   */
  public class SimpleNamedFilterList implements NamedFilterList {
  
      private String name;
      private List<Filter> backingList;
  
      /**
       * Creates a new {@code SimpleNamedFilterList} instance with the specified {@code name}, defaulting to a new
       * {@link ArrayList ArrayList} instance as the backing list.
       *
       * @param name the name to assign to this instance.
       * @throws IllegalArgumentException if {@code name} is null or empty.
       */
      public SimpleNamedFilterList(String name) {
          this(name, new ArrayList<Filter>());
      }
  
      /**
       * Creates a new {@code SimpleNamedFilterList} instance with the specified {@code name} and {@code backingList}.
       *
       * @param name        the name to assign to this instance.
       * @param backingList the list instance used to back all of this class's {@link List} method implementations.
       * @throws IllegalArgumentException if {@code name} is null or empty.
       * @throws NullPointerException     if the backing list is {@code null}.
       */
      public SimpleNamedFilterList(String name, List<Filter> backingList) {
          if (backingList == null) {
              throw new NullPointerException("backingList constructor argument cannot be null.");
          }
          this.backingList = backingList;
          setName(name);
      }
  
      protected void setName(String name) {
          if (!StringUtils.hasText(name)) {
              throw new IllegalArgumentException("Cannot specify a null or empty name.");
          }
          this.name = name;
      }
  
      public String getName() {
          return name;
      }
  
      public FilterChain proxy(FilterChain orig) {
          return new ProxiedFilterChain(orig, this);
      }
  
      public boolean add(Filter filter) {
          return this.backingList.add(filter);
      }
  
      public void add(int index, Filter filter) {
          this.backingList.add(index, filter);
      }
  
      public boolean addAll(Collection<? extends Filter> c) {
          return this.backingList.addAll(c);
      }
  
      public boolean addAll(int index, Collection<? extends Filter> c) {
          return this.backingList.addAll(index, c);
      }
  
      public void clear() {
          this.backingList.clear();
     }
 
     public boolean contains(Object o) {
         return this.backingList.contains(o);
     }
 
     public boolean containsAll(Collection<?> c) {
         return this.backingList.containsAll(c);
     }
 
     public Filter get(int index) {
         return this.backingList.get(index);
     }
 
     public int indexOf(Object o) {
         return this.backingList.indexOf(o);
     }
 
     public boolean isEmpty() {
         return this.backingList.isEmpty();
     }
 
     public Iterator<Filter> iterator() {
         return this.backingList.iterator();
     }
 
     public int lastIndexOf(Object o) {
         return this.backingList.lastIndexOf(o);
     }
 
     public ListIterator<Filter> listIterator() {
         return this.backingList.listIterator();
     }
 
     public ListIterator<Filter> listIterator(int index) {
         return this.backingList.listIterator(index);
     }
 
     public Filter remove(int index) {
         return this.backingList.remove(index);
     }
 
     public boolean remove(Object o) {
         return this.backingList.remove(o);
     }
 
     public boolean removeAll(Collection<?> c) {
         return this.backingList.removeAll(c);
     }
 
     public boolean retainAll(Collection<?> c) {
         return this.backingList.retainAll(c);
     }
 
     public Filter set(int index, Filter filter) {
         return this.backingList.set(index, filter);
     }
 
     public int size() {
         return this.backingList.size();
     }
 
     public List<Filter> subList(int fromIndex, int toIndex) {
         return this.backingList.subList(fromIndex, toIndex);
     }
 
     public Object[] toArray() {
         return this.backingList.toArray();
     }
 
     public <T> T[] toArray(T[] a) {
         //noinspection SuspiciousToArrayCall
         return this.backingList.toArray(a);
     }
 }