- /*
- * Copyright 2002-2004 The Apache Software Foundation
- *
- * 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 org.apache.commons.collections.bag;
-
- import java.io.IOException;
- import java.io.ObjectInputStream;
- import java.io.ObjectOutputStream;
- import java.io.Serializable;
- import java.util.Collection;
- import java.util.HashMap;
-
- import org.apache.commons.collections.Bag;
-
- /**
- * Implements <code>Bag</code>, using a <code>HashMap</code> to provide the
- * data storage. This is the standard implementation of a bag.
- * <p>
- * A <code>Bag</code> stores each object in the collection together with a
- * count of occurrences. Extra methods on the interface allow multiple copies
- * of an object to be added or removed at once. It is important to read the
- * interface javadoc carefully as several methods violate the
- * <code>Collection</code> interface specification.
- *
- * @since Commons Collections 3.0 (previously in main package v2.0)
- * @version $Revision: 1.8 $ $Date: 2004/02/18 00:56:25 $
- *
- * @author Chuck Burdick
- * @author Stephen Colebourne
- */
- public class HashBag
- extends AbstractMapBag implements Bag, Serializable {
-
- /** Serial version lock */
- static final long serialVersionUID = -6561115435802554013L;
-
- /**
- * Constructs an empty <code>HashBag</code>.
- */
- public HashBag() {
- super(new HashMap());
- }
-
- /**
- * Constructs a bag containing all the members of the given collection.
- *
- * @param coll a collection to copy into this bag
- */
- public HashBag(Collection coll) {
- this();
- addAll(coll);
- }
-
- //-----------------------------------------------------------------------
- /**
- * Write the bag out using a custom routine.
- */
- private void writeObject(ObjectOutputStream out) throws IOException {
- out.defaultWriteObject();
- super.doWriteObject(out);
- }
-
- /**
- * Read the bag in using a custom routine.
- */
- private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
- in.defaultReadObject();
- super.doReadObject(new HashMap(), in);
- }
-
- }