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 * SparseIntArrays map integers to integers. Unlike a normal array of integers, 26b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * there can be gaps in the indices. It is intended to be more memory efficient 27b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * than using a HashMap to map Integers to Integers, both because it avoids 28b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * auto-boxing keys and values and its data structure doesn't rely on an extra entry object 29b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * for each mapping. 30b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * 31b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * <p>Note that this container keeps its mappings in an array data structure, 32b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * using a binary search to find keys. The implementation is not intended to be appropriate for 33b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * data structures 34b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * that may contain large numbers of items. It is generally slower than a traditional 35b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * HashMap, since lookups require a binary search and adds and removes require inserting 36b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * and deleting entries in the array. For containers holding up to hundreds of items, 37b993f41eb2f165425dfdf0f93ea0b1e354eca837Dianne Hackborn * the performance difference is not significant, less than 50%.</p> 385771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * 395771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * <p>It is possible to iterate over the items in this container using 405771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * {@link #keyAt(int)} and {@link #valueAt(int)}. Iterating over the keys using 415771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * <code>keyAt(int)</code> with ascending values of the index will return the 425771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * keys in ascending order, or the values corresponding to the keys in ascending 43ebb47950f21d3c41955a591000dfb1f195e746feNewton Allen * order in the case of <code>valueAt(int)</code>.</p> 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 4535bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganovpublic class SparseIntArray implements Cloneable { 4635bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov private int[] mKeys; 4735bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov private int[] mValues; 4835bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov private int mSize; 4935bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Creates a new SparseIntArray containing no mappings. 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public SparseIntArray() { 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project this(10); 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Creates a new SparseIntArray containing no mappings that will not 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * require any additional memory allocation to store the specified 60f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn * number of mappings. If you supply an initial capacity of 0, the 61f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn * sparse array will be initialized with a light-weight representation 62f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn * not requiring any additional array allocations. 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public SparseIntArray(int initialCapacity) { 65f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn if (initialCapacity == 0) { 66776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski mKeys = EmptyArray.INT; 67776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski mValues = EmptyArray.INT; 68f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn } else { 69776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski mKeys = ArrayUtils.newUnpaddedIntArray(initialCapacity); 70776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski mValues = new int[mKeys.length]; 71f4bf0ae2a7c2d9d92c5c8abdb82baa53b4c9ccdaDianne Hackborn } 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSize = 0; 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 7535bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov @Override 7635bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov public SparseIntArray clone() { 7735bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov SparseIntArray clone = null; 7835bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov try { 7935bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov clone = (SparseIntArray) super.clone(); 8035bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov clone.mKeys = mKeys.clone(); 8135bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov clone.mValues = mValues.clone(); 8235bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov } catch (CloneNotSupportedException cnse) { 8335bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov /* ignore */ 8435bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov } 8535bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov return clone; 8635bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov } 8735bfedeaba724aeadc6f6c890269cb6bf7ef42f5Svetoslav Ganov 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Gets the int mapped from the specified key, or <code>0</code> 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * if no such mapping has been made. 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int get(int key) { 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return get(key, 0); 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Gets the int mapped from the specified key, or the specified value 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * if no such mapping has been made. 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int get(int key, int valueIfKeyNotFound) { 1013e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn int i = ContainerHelpers.binarySearch(mKeys, mSize, key); 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (i < 0) { 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return valueIfKeyNotFound; 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mValues[i]; 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Removes the mapping from the specified key, if there was any. 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void delete(int key) { 1143e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn int i = ContainerHelpers.binarySearch(mKeys, mSize, key); 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (i >= 0) { 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project removeAt(i); 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Removes the mapping at the given index. 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void removeAt(int index) { 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project System.arraycopy(mKeys, index + 1, mKeys, index, mSize - (index + 1)); 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project System.arraycopy(mValues, index + 1, mValues, index, mSize - (index + 1)); 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSize--; 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Adds a mapping from the specified key to the specified value, 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * replacing the previous mapping from the specified key if there 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * was one. 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void put(int key, int value) { 1363e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn int i = ContainerHelpers.binarySearch(mKeys, mSize, key); 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (i >= 0) { 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mValues[i] = value; 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project i = ~i; 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 143776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski mKeys = GrowingArrayUtils.insert(mKeys, mSize, i, key); 144776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski mValues = GrowingArrayUtils.insert(mValues, mSize, i, value); 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSize++; 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns the number of key-value mappings that this SparseIntArray 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * currently stores. 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int size() { 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSize; 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Given an index in the range <code>0...size()-1</code>, returns 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the key from the <code>index</code>th key-value mapping that this 1605771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * SparseIntArray stores. 1615771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * 1625771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * <p>The keys corresponding to indices in ascending order are guaranteed to 1635771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * be in ascending order, e.g., <code>keyAt(0)</code> will return the 1645771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * smallest key and <code>keyAt(size()-1)</code> will return the largest 1655771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * key.</p> 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int keyAt(int index) { 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mKeys[index]; 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1705771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Given an index in the range <code>0...size()-1</code>, returns 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the value from the <code>index</code>th key-value mapping that this 1745771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * SparseIntArray stores. 1755771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * 1765771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * <p>The values corresponding to indices in ascending order are guaranteed 1775771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * to be associated with keys in ascending order, e.g., 1785771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * <code>valueAt(0)</code> will return the value associated with the 1795771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * smallest key and <code>valueAt(size()-1)</code> will return the value 1805771302ca13c31cb85f17bc58da8f6f8227c9b85Flavio Lerda * associated with the largest key.</p> 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int valueAt(int index) { 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mValues[index]; 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns the index for which {@link #keyAt} would return the 1889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * specified key, or a negative number if the specified 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * key is not mapped. 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int indexOfKey(int key) { 1923e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn return ContainerHelpers.binarySearch(mKeys, mSize, key); 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 1969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns an index for which {@link #valueAt} would return the 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * specified key, or a negative number if no keys map to the 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * specified value. 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Beware that this is a linear search, unlike lookups by key, 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * and that multiple keys can map to the same value and this will 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * find only one of them. 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int indexOfValue(int value) { 2049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < mSize; i++) 2059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mValues[i] == value) 2069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return i; 2079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return -1; 2099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Removes all key-value mappings from this SparseIntArray. 2139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void clear() { 2159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSize = 0; 2169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 2199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Puts a key/value pair into the array, optimizing for the case where 2209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the key is greater than all existing keys in the array. 2219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 2229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void append(int key, int value) { 2239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (mSize != 0 && key <= mKeys[mSize - 1]) { 2249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project put(key, value); 2259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return; 2269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 228776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski mKeys = GrowingArrayUtils.append(mKeys, mSize, key); 229776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski mValues = GrowingArrayUtils.append(mValues, mSize, value); 230776abc24cdd18610232a50b997cce3cffa74609bAdam Lesinski mSize++; 2319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2323e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn 2333e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn /** 2343e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn * {@inheritDoc} 2353e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn * 2363e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn * <p>This implementation composes a string by iterating over its mappings. 2373e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn */ 2383e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn @Override 2393e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn public String toString() { 2403e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn if (size() <= 0) { 2413e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn return "{}"; 2423e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn } 2433e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn 2443e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn StringBuilder buffer = new StringBuilder(mSize * 28); 2453e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn buffer.append('{'); 2463e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn for (int i=0; i<mSize; i++) { 2473e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn if (i > 0) { 2483e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn buffer.append(", "); 2493e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn } 2503e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn int key = keyAt(i); 2513e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn buffer.append(key); 2523e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn buffer.append('='); 2533e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn int value = valueAt(i); 2543e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn buffer.append(value); 2553e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn } 2563e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn buffer.append('}'); 2573e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn return buffer.toString(); 2583e82ba1a67b0c756ab6a289985f4cfc53725b311Dianne Hackborn } 2599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 260