19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2006 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage android.util; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport com.android.internal.util.ArrayUtils; 20776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinskiimport com.android.internal.util.GrowingArrayUtils; 21776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski 22776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinskiimport libcore.util.EmptyArray; 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * SparseBooleanArrays map integers to booleans. 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unlike a normal array of booleans 27b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * there can be gaps in the indices. It is intended to be more memory efficient 28b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * than using a HashMap to map Integers to Booleans, both because it avoids 29b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * auto-boxing keys and values and its data structure doesn't rely on an extra entry object 30b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * for each mapping. 31b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * 32b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * <p>Note that this container keeps its mappings in an array data structure, 33b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * using a binary search to find keys. The implementation is not intended to be appropriate for 34b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * data structures 35b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * that may contain large numbers of items. It is generally slower than a traditional 36b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * HashMap, since lookups require a binary search and adds and removes require inserting 37b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * and deleting entries in the array. For containers holding up to hundreds of items, 38b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * the performance difference is not significant, less than 50%.</p> 395771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * 405771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * <p>It is possible to iterate over the items in this container using 415771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * {@link #keyAt(int)} and {@link #valueAt(int)}. Iterating over the keys using 425771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * <code>keyAt(int)</code> with ascending values of the index will return the 435771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * keys in ascending order, or the values corresponding to the keys in ascending 44ebb47950f21d3c41955a591000dfb1f195e746feNewton Allen * order in the case of <code>valueAt(int)</code>.</p> 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4635bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganovpublic class SparseBooleanArray implements Cloneable { 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Creates a new SparseBooleanArray containing no mappings. 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public SparseBooleanArray() { 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(10); 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Creates a new SparseBooleanArray containing no mappings that will not 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * require any additional memory allocation to store the specified 57f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn * number of mappings. If you supply an initial capacity of 0, the 58f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn * sparse array will be initialized with a light-weight representation 59f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn * not requiring any additional array allocations. 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public SparseBooleanArray(int initialCapacity) { 62f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn if (initialCapacity == 0) { 63776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski mKeys = EmptyArray.INT; 64776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski mValues = EmptyArray.BOOLEAN; 65f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn } else { 66776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski mKeys = ArrayUtils.newUnpaddedIntArray(initialCapacity); 67776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski mValues = new boolean[mKeys.length]; 68f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn } 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSize = 0; 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7235bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov @Override 7335bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov public SparseBooleanArray clone() { 7435bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov SparseBooleanArray clone = null; 7535bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov try { 7635bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov clone = (SparseBooleanArray) super.clone(); 7735bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov clone.mKeys = mKeys.clone(); 7835bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov clone.mValues = mValues.clone(); 7935bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov } catch (CloneNotSupportedException cnse) { 8035bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov /* ignore */ 8135bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov } 8235bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov return clone; 8335bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov } 8435bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Gets the boolean mapped from the specified key, or <code>false</code> 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * if no such mapping has been made. 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean get(int key) { 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return get(key, false); 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Gets the boolean mapped from the specified key, or the specified value 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * if no such mapping has been made. 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean get(int key, boolean valueIfKeyNotFound) { 983e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn int i = ContainerHelpers.binarySearch(mKeys, mSize, key); 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (i < 0) { 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return valueIfKeyNotFound; 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mValues[i]; 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Removes the mapping from the specified key, if there was any. 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void delete(int key) { 1113e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn int i = ContainerHelpers.binarySearch(mKeys, mSize, key); 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (i >= 0) { 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project System.arraycopy(mKeys, i + 1, mKeys, i, mSize - (i + 1)); 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project System.arraycopy(mValues, i + 1, mValues, i, mSize - (i + 1)); 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSize--; 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 120d77bce88d4c525611dda73816378d39aa43bd563Jake Wharton /** 121d77bce88d4c525611dda73816378d39aa43bd563Jake Wharton * Removes the mapping at the specified index. 122d77bce88d4c525611dda73816378d39aa43bd563Jake Wharton * <p> 123d77bce88d4c525611dda73816378d39aa43bd563Jake Wharton * For indices outside of the range {@code 0...size()-1}, the behavior is undefined. 124d77bce88d4c525611dda73816378d39aa43bd563Jake Wharton */ 125eaf2ac464b1cd741d7d0fe700771b1b7c00ddb29Dianne Hackborn public void removeAt(int index) { 126eaf2ac464b1cd741d7d0fe700771b1b7c00ddb29Dianne Hackborn System.arraycopy(mKeys, index + 1, mKeys, index, mSize - (index + 1)); 127eaf2ac464b1cd741d7d0fe700771b1b7c00ddb29Dianne Hackborn System.arraycopy(mValues, index + 1, mValues, index, mSize - (index + 1)); 128eaf2ac464b1cd741d7d0fe700771b1b7c00ddb29Dianne Hackborn mSize--; 129eaf2ac464b1cd741d7d0fe700771b1b7c00ddb29Dianne Hackborn } 130eaf2ac464b1cd741d7d0fe700771b1b7c00ddb29Dianne Hackborn 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Adds a mapping from the specified key to the specified value, 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * replacing the previous mapping from the specified key if there 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * was one. 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void put(int key, boolean value) { 1373e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn int i = ContainerHelpers.binarySearch(mKeys, mSize, key); 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (i >= 0) { 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mValues[i] = value; 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project i = ~i; 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 144776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski mKeys = GrowingArrayUtils.insert(mKeys, mSize, i, key); 145776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski mValues = GrowingArrayUtils.insert(mValues, mSize, i, value); 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSize++; 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns the number of key-value mappings that this SparseBooleanArray 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * currently stores. 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int size() { 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSize; 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Given an index in the range <code>0...size()-1</code>, returns 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the key from the <code>index</code>th key-value mapping that this 1615771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * SparseBooleanArray stores. 1625771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * 1635771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * <p>The keys corresponding to indices in ascending order are guaranteed to 1645771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * be in ascending order, e.g., <code>keyAt(0)</code> will return the 1655771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * smallest key and <code>keyAt(size()-1)</code> will return the largest 1665771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * key.</p> 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int keyAt(int index) { 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mKeys[index]; 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1715771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Given an index in the range <code>0...size()-1</code>, returns 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the value from the <code>index</code>th key-value mapping that this 1755771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * SparseBooleanArray stores. 1765771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * 1775771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * <p>The values corresponding to indices in ascending order are guaranteed 1785771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * to be associated with keys in ascending order, e.g., 1795771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * <code>valueAt(0)</code> will return the value associated with the 1805771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * smallest key and <code>valueAt(size()-1)</code> will return the value 1815771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * associated with the largest key.</p> 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean valueAt(int index) { 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mValues[index]; 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 187eaf2ac464b1cd741d7d0fe700771b1b7c00ddb29Dianne Hackborn /** @hide */ 188eaf2ac464b1cd741d7d0fe700771b1b7c00ddb29Dianne Hackborn public void setValueAt(int index, boolean value) { 189eaf2ac464b1cd741d7d0fe700771b1b7c00ddb29Dianne Hackborn mValues[index] = value; 190eaf2ac464b1cd741d7d0fe700771b1b7c00ddb29Dianne Hackborn } 191eaf2ac464b1cd741d7d0fe700771b1b7c00ddb29Dianne Hackborn 1924b3a13c1d05115a197ccddcee7da1f48dcd460f3Steve McKay /** @hide */ 1934b3a13c1d05115a197ccddcee7da1f48dcd460f3Steve McKay public void setKeyAt(int index, int key) { 1944b3a13c1d05115a197ccddcee7da1f48dcd460f3Steve McKay mKeys[index] = key; 1954b3a13c1d05115a197ccddcee7da1f48dcd460f3Steve McKay } 1964b3a13c1d05115a197ccddcee7da1f48dcd460f3Steve McKay 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns the index for which {@link #keyAt} would return the 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * specified key, or a negative number if the specified 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * key is not mapped. 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int indexOfKey(int key) { 2033e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn return ContainerHelpers.binarySearch(mKeys, mSize, key); 2049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns an index for which {@link #valueAt} would return the 2089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * specified key, or a negative number if no keys map to the 2099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * specified value. 2109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Beware that this is a linear search, unlike lookups by key, 2119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * and that multiple keys can map to the same value and this will 2129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * find only one of them. 2139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int indexOfValue(boolean value) { 2159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < mSize; i++) 2169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mValues[i] == value) 2179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return i; 2189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return -1; 2209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Removes all key-value mappings from this SparseBooleanArray. 2249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void clear() { 2269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSize = 0; 2279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Puts a key/value pair into the array, optimizing for the case where 2319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the key is greater than all existing keys in the array. 2329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void append(int key, boolean value) { 2349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSize != 0 && key <= mKeys[mSize - 1]) { 2359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project put(key, value); 2369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 2379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 239776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski mKeys = GrowingArrayUtils.append(mKeys, mSize, key); 240776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski mValues = GrowingArrayUtils.append(mValues, mSize, value); 241776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski mSize++; 2429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2433e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn 2443b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay @Override 2453b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay public int hashCode() { 2463b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay int hashCode = mSize; 2473b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay for (int i = 0; i < mSize; i++) { 2483b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay hashCode = 31 * hashCode + mKeys[i] | (mValues[i] ? 1 : 0); 2493b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay } 2503b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay return hashCode; 2513b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay } 2523b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay 2533b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay @Override 2543b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay public boolean equals(Object that) { 2553b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay if (this == that) { 2563b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay return true; 2573b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay } 2583b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay 2593b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay if (!(that instanceof SparseBooleanArray)) { 2603b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay return false; 2613b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay } 2623b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay 2633b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay SparseBooleanArray other = (SparseBooleanArray) that; 2643b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay if (mSize != other.mSize) { 2653b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay return false; 2663b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay } 2673b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay 2683b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay for (int i = 0; i < mSize; i++) { 2693b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay if (mKeys[i] != other.mKeys[i]) { 2703b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay return false; 2713b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay } 2723b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay if (mValues[i] != other.mValues[i]) { 2733b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay return false; 2743b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay } 2753b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay } 2763b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay return true; 2773b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay } 2783b409d01b9511e196ca5ad746c44fd93925ab1b8Steve McKay 2793e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn /** 2803e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn * {@inheritDoc} 2813e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn * 2823e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn * <p>This implementation composes a string by iterating over its mappings. 2833e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn */ 2843e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn @Override 2853e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn public String toString() { 2863e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn if (size() <= 0) { 2873e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn return "{}"; 2883e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn } 2893e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn 2903e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn StringBuilder buffer = new StringBuilder(mSize * 28); 2913e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn buffer.append('{'); 2923e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn for (int i=0; i<mSize; i++) { 2933e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn if (i > 0) { 2943e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn buffer.append(", "); 2953e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn } 2963e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn int key = keyAt(i); 2973e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn buffer.append(key); 2983e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn buffer.append('='); 2993e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn boolean value = valueAt(i); 3003e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn buffer.append(value); 3013e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn } 3023e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn buffer.append('}'); 3033e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn return buffer.toString(); 3043e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn } 3053e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn 3069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int[] mKeys; 3079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private boolean[] mValues; 3089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mSize; 3099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 310