001    /*
002     *  This file is part of the Jikes RVM project (http://jikesrvm.org).
003     *
004     *  This file is licensed to You under the Eclipse Public License (EPL);
005     *  You may not use this file except in compliance with the License. You
006     *  may obtain a copy of the License at
007     *
008     *      http://www.opensource.org/licenses/eclipse-1.0.php
009     *
010     *  See the COPYRIGHT.txt file distributed with this work for information
011     *  regarding copyright ownership.
012     */
013    package org.jikesrvm.util;
014    
015    /**
016     * Stripped down implementation of HashSet for use
017     * by core parts of the JikesRVM runtime. Consider the use of
018     * {@link ImmutableEntryHashSetRVM} when the use of the HashSet
019     * methods is limited.
020     */
021    public final class HashSetRVM<T> extends AbstractHashSetRVM<T> {
022      static final class Bucket<T> extends AbstractBucket<T> {
023        private final T key;
024        private AbstractBucket<T> next;
025    
026        Bucket(T key, AbstractBucket<T> next) {
027          this.key = key;
028          this.next = next;
029        }
030    
031        @Override
032        AbstractBucket<T> setNext(AbstractBucket<T> next) {
033          this.next = next;
034          return this;
035        }
036    
037        @Override
038        AbstractBucket<T> getNext() {
039          return next;
040        }
041    
042        @Override
043        T getKey() {
044          return key;
045        }
046      }
047    
048      @Override
049      AbstractBucket<T> createNewBucket(T key, AbstractBucket<T> next) {
050        return new Bucket<T>(key, next);
051      }
052    
053      public HashSetRVM() {
054        super(DEFAULT_SIZE);
055      }
056    
057      public HashSetRVM(int size) {
058        super(size);
059      }
060    }