LongSparseLongArray.java revision 3e82ba1a67b0c756ab6a289985f4cfc53725b311
1dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey/* 2dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * Copyright (C) 2007 The Android Open Source Project 3dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * 4dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * Licensed under the Apache License, Version 2.0 (the "License"); 5dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * you may not use this file except in compliance with the License. 6dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * You may obtain a copy of the License at 7dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * 8dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * http://www.apache.org/licenses/LICENSE-2.0 9dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * 10dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * Unless required by applicable law or agreed to in writing, software 11dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * distributed under the License is distributed on an "AS IS" BASIS, 12dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * See the License for the specific language governing permissions and 14dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * limitations under the License. 15dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey */ 16dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 17dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkeypackage android.util; 18dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 19dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkeyimport com.android.internal.util.ArrayUtils; 20dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 21dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkeyimport java.util.Arrays; 22dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 23dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey/** 24dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * Map of {@code long} to {@code long}. Unlike a normal array of longs, there 25b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * can be gaps in the indices. It is intended to be more memory efficient than using a 26b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * {@code HashMap}, both because it avoids 27b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * auto-boxing keys and values and its data structure doesn't rely on an extra entry object 28b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * for each mapping. 29b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * 30b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * <p>Note that this container keeps its mappings in an array data structure, 31b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * using a binary search to find keys. The implementation is not intended to be appropriate for 32b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * data structures 33b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * that may contain large numbers of items. It is generally slower than a traditional 34b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * HashMap, since lookups require a binary search and adds and removes require inserting 35b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * and deleting entries in the array. For containers holding up to hundreds of items, 36b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * the performance difference is not significant, less than 50%.</p> 37dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * 38dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * @hide 39dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey */ 40dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkeypublic class LongSparseLongArray implements Cloneable { 41dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey private long[] mKeys; 42dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey private long[] mValues; 43dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey private int mSize; 44dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 45dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey /** 46dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * Creates a new SparseLongArray containing no mappings. 47dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey */ 48dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey public LongSparseLongArray() { 49dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey this(10); 50dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } 51dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 52dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey /** 53dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * Creates a new SparseLongArray containing no mappings that will not 54dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * require any additional memory allocation to store the specified 55f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn * number of mappings. If you supply an initial capacity of 0, the 56f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn * sparse array will be initialized with a light-weight representation 57f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn * not requiring any additional array allocations. 58dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey */ 59dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey public LongSparseLongArray(int initialCapacity) { 60f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn if (initialCapacity == 0) { 613e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn mKeys = ContainerHelpers.EMPTY_LONGS; 623e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn mValues = ContainerHelpers.EMPTY_LONGS; 63f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn } else { 64f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn initialCapacity = ArrayUtils.idealLongArraySize(initialCapacity); 65f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn mKeys = new long[initialCapacity]; 66f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn mValues = new long[initialCapacity]; 67f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn } 68dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey mSize = 0; 69dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } 70dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 71dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey @Override 72dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey public LongSparseLongArray clone() { 73dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey LongSparseLongArray clone = null; 74dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey try { 75dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey clone = (LongSparseLongArray) super.clone(); 76dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey clone.mKeys = mKeys.clone(); 77dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey clone.mValues = mValues.clone(); 78dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } catch (CloneNotSupportedException cnse) { 79dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey /* ignore */ 80dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } 81dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey return clone; 82dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } 83dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 84dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey /** 85dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * Gets the long mapped from the specified key, or <code>0</code> 86dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * if no such mapping has been made. 87dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey */ 88dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey public long get(long key) { 89dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey return get(key, 0); 90dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } 91dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 92dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey /** 93dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * Gets the long mapped from the specified key, or the specified value 94dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * if no such mapping has been made. 95dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey */ 96dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey public long get(long key, long valueIfKeyNotFound) { 973e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn int i = ContainerHelpers.binarySearch(mKeys, mSize, key); 98dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 99dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey if (i < 0) { 100dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey return valueIfKeyNotFound; 101dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } else { 102dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey return mValues[i]; 103dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } 104dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } 105dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 106dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey /** 107dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * Removes the mapping from the specified key, if there was any. 108dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey */ 109dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey public void delete(long key) { 1103e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn int i = ContainerHelpers.binarySearch(mKeys, mSize, key); 111dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 112dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey if (i >= 0) { 113dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey removeAt(i); 114dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } 115dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } 116dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 117dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey /** 118dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * Removes the mapping at the given index. 119dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey */ 120dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey public void removeAt(int index) { 121dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey System.arraycopy(mKeys, index + 1, mKeys, index, mSize - (index + 1)); 122dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey System.arraycopy(mValues, index + 1, mValues, index, mSize - (index + 1)); 123dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey mSize--; 124dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } 125dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 126dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey /** 127dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * Adds a mapping from the specified key to the specified value, 128dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * replacing the previous mapping from the specified key if there 129dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * was one. 130dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey */ 131dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey public void put(long key, long value) { 1323e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn int i = ContainerHelpers.binarySearch(mKeys, mSize, key); 133dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 134dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey if (i >= 0) { 135dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey mValues[i] = value; 136dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } else { 137dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey i = ~i; 138dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 139dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey if (mSize >= mKeys.length) { 140dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey growKeyAndValueArrays(mSize + 1); 141dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } 142dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 143dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey if (mSize - i != 0) { 144dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey System.arraycopy(mKeys, i, mKeys, i + 1, mSize - i); 145dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey System.arraycopy(mValues, i, mValues, i + 1, mSize - i); 146dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } 147dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 148dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey mKeys[i] = key; 149dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey mValues[i] = value; 150dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey mSize++; 151dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } 152dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } 153dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 154dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey /** 155dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * Returns the number of key-value mappings that this SparseIntArray 156dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * currently stores. 157dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey */ 158dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey public int size() { 159dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey return mSize; 160dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } 161dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 162dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey /** 163dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * Given an index in the range <code>0...size()-1</code>, returns 164dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * the key from the <code>index</code>th key-value mapping that this 165dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * SparseLongArray stores. 166dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey */ 167dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey public long keyAt(int index) { 168dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey return mKeys[index]; 169dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } 170dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 171dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey /** 172dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * Given an index in the range <code>0...size()-1</code>, returns 173dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * the value from the <code>index</code>th key-value mapping that this 174dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * SparseLongArray stores. 175dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey */ 176dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey public long valueAt(int index) { 177dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey return mValues[index]; 178dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } 179dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 180dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey /** 181dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * Returns the index for which {@link #keyAt} would return the 182dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * specified key, or a negative number if the specified 183dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * key is not mapped. 184dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey */ 185dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey public int indexOfKey(long key) { 1863e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn return ContainerHelpers.binarySearch(mKeys, mSize, key); 187dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } 188dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 189dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey /** 190dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * Returns an index for which {@link #valueAt} would return the 191dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * specified key, or a negative number if no keys map to the 192dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * specified value. 193dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * Beware that this is a linear search, unlike lookups by key, 194dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * and that multiple keys can map to the same value and this will 195dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * find only one of them. 196dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey */ 197dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey public int indexOfValue(long value) { 198dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey for (int i = 0; i < mSize; i++) 199dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey if (mValues[i] == value) 200dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey return i; 201dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 202dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey return -1; 203dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } 204dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 205dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey /** 206dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * Removes all key-value mappings from this SparseIntArray. 207dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey */ 208dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey public void clear() { 209dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey mSize = 0; 210dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } 211dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 212dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey /** 213dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * Puts a key/value pair into the array, optimizing for the case where 214dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey * the key is greater than all existing keys in the array. 215dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey */ 216dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey public void append(long key, long value) { 217dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey if (mSize != 0 && key <= mKeys[mSize - 1]) { 218dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey put(key, value); 219dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey return; 220dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } 221dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 222dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey int pos = mSize; 223dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey if (pos >= mKeys.length) { 224dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey growKeyAndValueArrays(pos + 1); 225dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } 226dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 227dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey mKeys[pos] = key; 228dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey mValues[pos] = value; 229dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey mSize = pos + 1; 230dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } 231dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 232dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey private void growKeyAndValueArrays(int minNeededSize) { 233dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey int n = ArrayUtils.idealLongArraySize(minNeededSize); 234dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 235dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey long[] nkeys = new long[n]; 236dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey long[] nvalues = new long[n]; 237dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 238dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey System.arraycopy(mKeys, 0, nkeys, 0, mKeys.length); 239dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey System.arraycopy(mValues, 0, nvalues, 0, mValues.length); 240dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey 241dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey mKeys = nkeys; 242dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey mValues = nvalues; 243dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey } 2443e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn 2453e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn /** 2463e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn * {@inheritDoc} 2473e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn * 2483e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn * <p>This implementation composes a string by iterating over its mappings. 2493e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn */ 2503e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn @Override 2513e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn public String toString() { 2523e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn if (size() <= 0) { 2533e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn return "{}"; 2543e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn } 2553e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn 2563e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn StringBuilder buffer = new StringBuilder(mSize * 28); 2573e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn buffer.append('{'); 2583e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn for (int i=0; i<mSize; i++) { 2593e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn if (i > 0) { 2603e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn buffer.append(", "); 2613e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn } 2623e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn long key = keyAt(i); 2633e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn buffer.append(key); 2643e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn buffer.append('='); 2653e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn long value = valueAt(i); 2663e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn buffer.append(value); 2673e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn } 2683e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn buffer.append('}'); 2693e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn return buffer.toString(); 2703e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn } 271dda73b5dcd92006762a1c71e2fb352e64fa265efJeff Sharkey} 272