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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;
  }
  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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