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  /*
   * Copyright (C) 2007 The Guava Authors
   *
   * Licensed 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 com.google.common.collect;
 
 import static com.google.common.base.Preconditions.checkArgument;
 
 
Multiset implementation backed by an java.util.EnumMap.

See the Guava User Guide article on Multiset.

Author(s):
Jared Levy
Since:
2.0 (imported from Google Collections Library)
 
 @GwtCompatible(emulated = true)
 public final class EnumMultiset<E extends Enum<E>> extends AbstractMapBasedMultiset<E> {
  
Creates an empty EnumMultiset.
 
   public static <E extends Enum<E>> EnumMultiset<E> create(Class<E> type) {
     return new EnumMultiset<E>(type);
   }

  
Creates a new EnumMultiset containing the specified elements.

This implementation is highly efficient when elements is itself a Multiset.

Parameters:
elements the elements that the multiset should contain
Throws:
java.lang.IllegalArgumentException if elements is empty
 
   public static <E extends Enum<E>> EnumMultiset<E> create(Iterable<E> elements) {
     Iterator<E> iterator = elements.iterator();
     checkArgument(iterator.hasNext(), "EnumMultiset constructor passed empty Iterable");
     EnumMultiset<E> multiset = new EnumMultiset<E>(iterator.next().getDeclaringClass());
     Iterables.addAll(multisetelements);
     return multiset;
   }
  
  
Returns a new EnumMultiset instance containing the given elements. Unlike create(java.lang.Iterable), this method does not produce an exception on an empty iterable.

Since:
14.0
 
   public static <E extends Enum<E>> EnumMultiset<E> create(Iterable<E> elementsClass<E> type) {
     EnumMultiset<E> result = create(type);
     Iterables.addAll(resultelements);
     return result;
   }
 
   private transient Class<E> type;

  
Creates an empty EnumMultiset.
 
   private EnumMultiset(Class<E> type) {
     super(WellBehavedMap.wrap(new EnumMap<E, Count>(type)));
     this. = type;
   }
 
   @GwtIncompatible("java.io.ObjectOutputStream")
   private void writeObject(ObjectOutputStream streamthrows IOException {
     stream.defaultWriteObject();
     stream.writeObject();
     Serialization.writeMultiset(thisstream);
   }

  

SerialData:
the Class<E> for the enum type, the number of distinct elements, the first element, its count, the second element, its count, and so on
 
   @GwtIncompatible("java.io.ObjectInputStream")
   private void readObject(ObjectInputStream streamthrows IOExceptionClassNotFoundException {
     stream.defaultReadObject();
     @SuppressWarnings("unchecked"// reading data stored by writeObject
     Class<E> localType = (Class<E>) stream.readObject();
     = localType;
    setBackingMap(WellBehavedMap.wrap(new EnumMap<E, Count>()));
    Serialization.populateMultiset(thisstream);
  }
  @GwtIncompatible("Not needed in emulated source")
  private static final long serialVersionUID = 0;
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