1f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project/* Copyright (C) 2003 Vladimir Roubtsov. All rights reserved. 2f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * 3f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * This program and the accompanying materials are made available under 4f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * the terms of the Common Public License v1.0 which accompanies this distribution, 5f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * and is available at http://www.eclipse.org/legal/cpl-v10.html 6f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * 7f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * $Id: IntSet.java,v 1.1.1.1 2004/05/09 16:57:53 vlad_r Exp $ 8f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project */ 9f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Projectpackage com.vladium.util; 10f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 11f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project// ---------------------------------------------------------------------------- 12f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project/** 13f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * 14f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * MT-safety: an instance of this class is <I>not</I> safe for access from 15f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * multiple concurrent threads [even if access is done by a single thread at a 16f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * time]. The caller is expected to synchronize externally on an instance [the 17f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * implementation does not do internal synchronization for the sake of efficiency]. 18f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * java.util.ConcurrentModificationException is not supported either. 19f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * 20f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * @author Vlad Roubtsov, (C) 2001 21f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project */ 22f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Projectpublic 23f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Projectfinal class IntSet 24f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project{ 25f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project // public: ................................................................ 26f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 27f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project /** 28f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * Equivalent to <CODE>IntSet(11, 0.75F)</CODE>. 29f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project */ 30f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project public IntSet () 31f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 32f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project this (11, 0.75F); 33f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 34f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 35f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project /** 36f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * Equivalent to <CODE>IntSet(capacity, 0.75F)</CODE>. 37f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project */ 38f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project public IntSet (final int initialCapacity) 39f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 40f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project this (initialCapacity, 0.75F); 41f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 42f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 43f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project /** 44f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * Constructs an IntSet with specified initial capacity and load factor. 45f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * 46f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * @param initialCapacity initial number of hash buckets in the table [may not be negative, 0 is equivalent to 1]. 47f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * @param loadFactor the load factor to use to determine rehashing points [must be in (0.0, 1.0] range]. 48f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project */ 49f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project public IntSet (int initialCapacity, final float loadFactor) 50f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 51f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project if (initialCapacity < 0) throw new IllegalArgumentException ("negative input: initialCapacity [" + initialCapacity + "]"); 52f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project if ((loadFactor <= 0.0) || (loadFactor >= 1.0 + 1.0E-6)) 53f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project throw new IllegalArgumentException ("loadFactor not in (0.0, 1.0] range: " + loadFactor); 54f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 55f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project if (initialCapacity == 0) initialCapacity = 1; 56f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 57f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project m_loadFactor = loadFactor > 1.0 ? 1.0F : loadFactor; 58f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project m_sizeThreshold = (int) (initialCapacity * loadFactor); 59f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project m_buckets = new Entry [initialCapacity]; 60f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 61f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 62f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 63f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project /** 64f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * Overrides Object.toString() for debug purposes. 65f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project */ 66f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project public String toString () 67f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 68f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project final StringBuffer s = new StringBuffer (); 69f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project debugDump (s); 70f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 71f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project return s.toString (); 72f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 73f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 74f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project /** 75f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * Returns the number of key-value mappings in this map. 76f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project */ 77f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project public int size () 78f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 79f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project return m_size; 80f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 81f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 82f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project public boolean contains (final int key) 83f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 84f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project // index into the corresponding hash bucket: 85f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project final Entry [] buckets = m_buckets; 86f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project final int bucketIndex = (key & 0x7FFFFFFF) % buckets.length; 87f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 88f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project // traverse the singly-linked list of entries in the bucket: 89f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project for (Entry entry = buckets [bucketIndex]; entry != null; entry = entry.m_next) 90f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 91f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project if (key == entry.m_key) 92f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project return true; 93f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 94f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 95f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project return false; 96f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 97f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 98f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project public int [] values () 99f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 100f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project if (m_size == 0) 101f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project return IConstants.EMPTY_INT_ARRAY; 102f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project else 103f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 104f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project final int [] result = new int [m_size]; 105f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project int scan = 0; 106f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 107f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project for (int b = 0; b < m_buckets.length; ++ b) 108f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 109f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project for (Entry entry = m_buckets [b]; entry != null; entry = entry.m_next) 110f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 111f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project result [scan ++] = entry.m_key; 112f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 113f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 114f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 115f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project return result; 116f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 117f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 118f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 119f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project public void values (final int [] target, final int offset) 120f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 121f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project if (m_size != 0) 122f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 123f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project int scan = offset; 124f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 125f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project for (int b = 0; b < m_buckets.length; ++ b) 126f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 127f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project for (Entry entry = m_buckets [b]; entry != null; entry = entry.m_next) 128f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 129f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project target [scan ++] = entry.m_key; 130f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 131f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 132f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 133f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 134f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 135f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project public boolean add (final int key) 136f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 137f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project Entry currentKeyEntry = null; 138f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 139f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project // detect if 'key' is already in the table [in which case, set 'currentKeyEntry' to point to its entry]: 140f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 141f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project // index into the corresponding hash bucket: 142f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project int bucketIndex = (key & 0x7FFFFFFF) % m_buckets.length; 143f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 144f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project // traverse the singly-linked list of entries in the bucket: 145f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project Entry [] buckets = m_buckets; 146f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project for (Entry entry = buckets [bucketIndex]; entry != null; entry = entry.m_next) 147f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 148f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project if (key == entry.m_key) 149f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 150f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project currentKeyEntry = entry; 151f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project break; 152f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 153f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 154f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 155f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project if (currentKeyEntry == null) 156f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 157f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project // add a new entry: 158f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 159f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project if (m_size >= m_sizeThreshold) rehash (); 160f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 161f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project buckets = m_buckets; 162f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project bucketIndex = (key & 0x7FFFFFFF) % buckets.length; 163f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project final Entry bucketListHead = buckets [bucketIndex]; 164f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project final Entry newEntry = new Entry (key, bucketListHead); 165f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project buckets [bucketIndex] = newEntry; 166f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 167f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project ++ m_size; 168f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 169f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project return true; 170f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 171f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project else 172f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project return false; 173f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 174f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 175f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project // protected: ............................................................. 176f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 177f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project // package: ............................................................... 178f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 179f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 180f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project void debugDump (final StringBuffer out) 181f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 182f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project if (out != null) 183f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 184f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project out.append (super.toString ()); out.append (EOL); 185f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project out.append ("size = " + m_size + ", bucket table size = " + m_buckets.length + ", load factor = " + m_loadFactor + EOL); 186f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project out.append ("size threshold = " + m_sizeThreshold + EOL); 187f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 188f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 189f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 190f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project // private: ............................................................... 191f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 192f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 193f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project /** 194f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * The structure used for chaining colliding keys. 195f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project */ 196f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project private static final class Entry 197f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 198f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project Entry (final int key, final Entry next) 199f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 200f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project m_key = key; 201f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project m_next = next; 202f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 203f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 204f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project final int m_key; 205f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 206f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project Entry m_next; // singly-linked list link 207f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 208f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } // end of nested class 209f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 210f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 211f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project /** 212f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project * Re-hashes the table into a new array of buckets. 213f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project */ 214f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project private void rehash () 215f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 216f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project // TODO: it is possible to run this method twice, first time using the 2*k+1 prime sequencer for newBucketCount 217f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project // and then with that value reduced to actually shrink capacity. As it is right now, the bucket table can 218f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project // only grow in size 219f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 220f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project final Entry [] buckets = m_buckets; 221f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 222f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project final int newBucketCount = (m_buckets.length << 1) + 1; 223f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project final Entry [] newBuckets = new Entry [newBucketCount]; 224f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 225f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project // rehash all entry chains in every bucket: 226f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project for (int b = 0; b < buckets.length; ++ b) 227f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 228f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project for (Entry entry = buckets [b]; entry != null; ) 229f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project { 230f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project final Entry next = entry.m_next; // remember next pointer because we are going to reuse this entry 231f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project final int entryKey = entry.m_key; 232f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 233f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project // index into the corresponding new hash bucket: 234f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project final int newBucketIndex = (entryKey & 0x7FFFFFFF) % newBucketCount; 235f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 236f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project final Entry bucketListHead = newBuckets [newBucketIndex]; 237f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project entry.m_next = bucketListHead; 238f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project newBuckets [newBucketIndex] = entry; 239f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 240f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project entry = next; 241f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 242f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 243f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 244f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 245f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project m_sizeThreshold = (int) (newBucketCount * m_loadFactor); 246f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project m_buckets = newBuckets; 247f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project } 248f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 249f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 250f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project private final float m_loadFactor; // determines the setting of m_sizeThreshold 251f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 252f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project private Entry [] m_buckets; // table of buckets 253f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project private int m_size; // number of keys in the table, not cleared as of last check 254f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project private int m_sizeThreshold; // size threshold for rehashing 255f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 256f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project private static final String EOL = System.getProperty ("line.separator", "\n"); 257f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 258f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project} // end of class 259f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project// ---------------------------------------------------------------------------- 260f6fe897e173f4e4bda72a7dddb091b667066764aThe Android Open Source Project 261