content: /*
   * 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.cassandra.simulator.systems;
  
  import java.util.AbstractSet;
  import java.util.HashMap;
  import java.util.IdentityHashMap;
  import java.util.Iterator;
  import java.util.Set;
  
  import com.google.common.collect.Iterators;
  
  import static org.apache.cassandra.simulator.systems.InterceptorOfSystemMethods.Global.identityHashCode;
  
  /**
   * A class that behaves like IdentityHashMap but uses our deterministically generated
   * {@link InterceptorOfSystemMethods.Global#identityHashCode(Object)}
   *
   * This is used in case we iterate over the contents of any such collection (which we do)
   */
  @SuppressWarnings("unused")
  public class InterceptedIdentityHashMap<K, V> extends IdentityHashMap<K, V>
  {
      static class Key<K>
      {
          final int hash;
          final K key;
  
          Key(K key)
          {
              this.key = key;
              this.hash = identityHashCode(key);
          }
  
          K key()
          {
              return key;
          }
  
          @Override
          public int hashCode()
          {
              return hash;
          }
  
          @Override
          public boolean equals(Object that)
          {
              return that instanceof Key && key == ((Key<?>)that).key;
          }
      }
  
      final HashMap<Key<K>, V> wrapped = new HashMap<>();
      public InterceptedIdentityHashMap() {}
      public InterceptedIdentityHashMap(int sizeToIgnore) {}
  
      @Override
      public int size()
      {
          return wrapped.size();
      }
  
      @Override
      public boolean isEmpty()
      {
          return wrapped.isEmpty();
      }
  
      @Override
      public boolean containsValue(Object value)
      {
          return wrapped.containsValue(value);
      }
  
      @Override
      public boolean containsKey(Object o)
      {
          return wrapped.containsKey(new Key<>(o));
      }
  
      @Override
      public V put(K key, V value)
      {
          return wrapped.put(new Key<>(key), value);
      }
  
      @Override
      public V get(Object key)
      {
          return wrapped.get(new Key<>(key));
      }
  
      @Override
      public V remove(Object key)
      {
          return wrapped.remove(new Key<>(key));
      }
  
      @Override
      public Set<K> keySet()
      {
          return new AbstractSet<K>()
          {
              @Override
              public Iterator<K> iterator()
              {
                  return Iterators.transform(wrapped.keySet().iterator(), Key::key);
              }
  
              @Override
              public boolean contains(Object o)
              {
                  return containsKey(new Key<>(o));
              }
  
              @Override
              public int size()
              {
                  return wrapped.size();
              }
          };
      }
  
      @Override
      public Set<Entry<K, V>> entrySet()
      {
          return new AbstractSet<Entry<K, V>>()
          {
              @Override
              public Iterator<Entry<K, V>> iterator()
              {
                  return Iterators.transform(wrapped.entrySet().iterator(), e -> new SimpleEntry<>(e.getKey().key, e.getValue()));
              }
  
              @Override
              public int size()
              {
                  return wrapped.size();
              }
          };
      }
  }
  