|
| 1 | +/* |
| 2 | + * Copyright (c) 2025, 2025, Oracle and/or its affiliates. All rights reserved. |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | + * |
| 5 | + * This code is free software; you can redistribute it and/or modify it |
| 6 | + * under the terms of the GNU General Public License version 2 only, as |
| 7 | + * published by the Free Software Foundation. Oracle designates this |
| 8 | + * particular file as subject to the "Classpath" exception as provided |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. |
| 10 | + * |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | + * accompanied this code). |
| 16 | + * |
| 17 | + * You should have received a copy of the GNU General Public License version |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | + * |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| 22 | + * or visit www.oracle.com if you need additional information or have any |
| 23 | + * questions. |
| 24 | + */ |
| 25 | +package com.oracle.svm.hosted.imagelayer; |
| 26 | + |
| 27 | +import java.util.Collection; |
| 28 | +import java.util.function.Consumer; |
| 29 | +import java.util.function.Function; |
| 30 | +import java.util.function.IntConsumer; |
| 31 | +import java.util.function.IntFunction; |
| 32 | +import java.util.function.Supplier; |
| 33 | +import java.util.function.ToIntFunction; |
| 34 | + |
| 35 | +import com.oracle.svm.hosted.imagelayer.SharedLayerSnapshotCapnProtoSchemaHolder.PrimitiveArray; |
| 36 | +import com.oracle.svm.shaded.org.capnproto.PrimitiveList; |
| 37 | +import com.oracle.svm.shaded.org.capnproto.StructList; |
| 38 | +import com.oracle.svm.shaded.org.capnproto.StructReader; |
| 39 | +import com.oracle.svm.shaded.org.capnproto.TextList; |
| 40 | + |
| 41 | +/** |
| 42 | + * Collection of adapters to interact with the Cap'n Proto internal value representation. |
| 43 | + */ |
| 44 | +public class CapnProtoAdapters { |
| 45 | + /** |
| 46 | + * Iterate values from a {@link PrimitiveList.Int} reader and pass them to the action. |
| 47 | + */ |
| 48 | + static void forEach(PrimitiveList.Int.Reader reader, IntConsumer action) { |
| 49 | + for (int i = 0; i < reader.size(); i++) { |
| 50 | + action.accept(reader.get(i)); |
| 51 | + } |
| 52 | + } |
| 53 | + |
| 54 | + /** |
| 55 | + * Iterate values from a {@link TextList} reader and pass them to the action. |
| 56 | + */ |
| 57 | + public static void forEach(TextList.Reader reader, Consumer<String> action) { |
| 58 | + for (int i = 0; i < reader.size(); i++) { |
| 59 | + action.accept(reader.get(i).toString()); |
| 60 | + } |
| 61 | + } |
| 62 | + |
| 63 | + /** |
| 64 | + * Iterate values from a {@link PrimitiveList.Int} reader, apply the mapping function, then |
| 65 | + * store them in the supplied array at the same index. |
| 66 | + */ |
| 67 | + static <T> T[] toArray(PrimitiveList.Int.Reader reader, IntFunction<? extends T> mapper, IntFunction<T[]> arrayGenerator) { |
| 68 | + T[] array = arrayGenerator.apply(reader.size()); |
| 69 | + for (int i = 0; i < reader.size(); i++) { |
| 70 | + array[i] = mapper.apply(reader.get(i)); |
| 71 | + } |
| 72 | + return array; |
| 73 | + } |
| 74 | + |
| 75 | + /** |
| 76 | + * Iterate values from a {@link StructList} reader, apply the mapping function, then store them |
| 77 | + * in the supplied array at the same index. |
| 78 | + */ |
| 79 | + static <R, T> T[] toArray(StructList.Reader<R> reader, Function<? super R, ? extends T> mapper, IntFunction<T[]> arrayGenerator) { |
| 80 | + T[] array = arrayGenerator.apply(reader.size()); |
| 81 | + for (int i = 0; i < reader.size(); i++) { |
| 82 | + array[i] = mapper.apply(reader.get(i)); |
| 83 | + } |
| 84 | + return array; |
| 85 | + } |
| 86 | + |
| 87 | + /** |
| 88 | + * Iterate values from a {@link TextList} reader, convert them to {@link String}, apply the |
| 89 | + * mapping function, then store them in the supplied array at the same index. |
| 90 | + */ |
| 91 | + static <T> T[] toArray(TextList.Reader reader, Function<String, ? extends T> mapper, IntFunction<T[]> arrayGenerator) { |
| 92 | + T[] array = arrayGenerator.apply(reader.size()); |
| 93 | + for (int i = 0; i < reader.size(); i++) { |
| 94 | + array[i] = mapper.apply(reader.get(i).toString()); |
| 95 | + } |
| 96 | + return array; |
| 97 | + } |
| 98 | + |
| 99 | + /** |
| 100 | + * Iterate values from a {@link PrimitiveList.Int} reader, apply the mapping function, then |
| 101 | + * collect them in the supplied collection. |
| 102 | + */ |
| 103 | + public static <T, U extends Collection<T>> U toCollection(PrimitiveList.Int.Reader reader, IntFunction<? extends T> mapper, Supplier<U> collectionFactory) { |
| 104 | + U collection = collectionFactory.get(); |
| 105 | + for (int i = 0; i < reader.size(); i++) { |
| 106 | + collection.add(mapper.apply(reader.get(i))); |
| 107 | + } |
| 108 | + return collection; |
| 109 | + } |
| 110 | + |
| 111 | + /** |
| 112 | + * Iterate values from a {@link TextList} reader, convert them to {@link String}, then collect |
| 113 | + * them in the supplied collection. |
| 114 | + */ |
| 115 | + public static <U extends Collection<String>> U toCollection(TextList.Reader reader, Supplier<U> collectionFactory) { |
| 116 | + return toCollection(reader, (s) -> s, collectionFactory); |
| 117 | + } |
| 118 | + |
| 119 | + /** |
| 120 | + * Iterate values from a {@link TextList} reader, convert them to {@link String}, apply the |
| 121 | + * mapping function, then collect them in the supplied collection. |
| 122 | + */ |
| 123 | + public static <T, U extends Collection<T>> U toCollection(TextList.Reader reader, Function<String, ? extends T> mapper, Supplier<U> collectionFactory) { |
| 124 | + U collection = collectionFactory.get(); |
| 125 | + for (int i = 0; i < reader.size(); i++) { |
| 126 | + collection.add(mapper.apply(reader.get(i).toString())); |
| 127 | + } |
| 128 | + return collection; |
| 129 | + } |
| 130 | + |
| 131 | + /** |
| 132 | + * Extract values from a {@link PrimitiveArray} reader to the corresponding Java primitive |
| 133 | + * array. |
| 134 | + */ |
| 135 | + static Object toArray(PrimitiveArray.Reader reader) { |
| 136 | + return switch (reader.which()) { |
| 137 | + case Z -> toBooleanArray(reader.getZ()); |
| 138 | + case B -> toByteArray(reader.getB()); |
| 139 | + case S -> toShortArray(reader.getS()); |
| 140 | + case C -> toCharArray(reader.getC()); |
| 141 | + case I -> toIntArray(reader.getI()); |
| 142 | + case F -> toFloatArray(reader.getF()); |
| 143 | + case J -> toLongArray(reader.getJ()); |
| 144 | + case D -> toDoubleArray(reader.getD()); |
| 145 | + case _NOT_IN_SCHEMA -> throw new IllegalArgumentException("Unsupported kind: " + reader.which()); |
| 146 | + }; |
| 147 | + } |
| 148 | + |
| 149 | + /** |
| 150 | + * Extract values from a {@link PrimitiveList.Boolean} reader to a {@code boolean[]} array. |
| 151 | + */ |
| 152 | + protected static boolean[] toBooleanArray(PrimitiveList.Boolean.Reader booleanReader) { |
| 153 | + boolean[] booleanArray = new boolean[booleanReader.size()]; |
| 154 | + for (int i = 0; i < booleanReader.size(); i++) { |
| 155 | + booleanArray[i] = booleanReader.get(i); |
| 156 | + } |
| 157 | + return booleanArray; |
| 158 | + } |
| 159 | + |
| 160 | + /** |
| 161 | + * Extract values from a {@link PrimitiveList.Byte} reader to a {@code byte[]} array. |
| 162 | + */ |
| 163 | + static byte[] toByteArray(PrimitiveList.Byte.Reader byteReader) { |
| 164 | + byte[] byteArray = new byte[byteReader.size()]; |
| 165 | + for (int i = 0; i < byteReader.size(); i++) { |
| 166 | + byteArray[i] = byteReader.get(i); |
| 167 | + } |
| 168 | + return byteArray; |
| 169 | + } |
| 170 | + |
| 171 | + /** |
| 172 | + * Extract values from a {@link PrimitiveList.Short} reader to a {@code short[]} array. |
| 173 | + */ |
| 174 | + static short[] toShortArray(PrimitiveList.Short.Reader shortReader) { |
| 175 | + short[] shortArray = new short[shortReader.size()]; |
| 176 | + for (int i = 0; i < shortReader.size(); i++) { |
| 177 | + shortArray[i] = shortReader.get(i); |
| 178 | + } |
| 179 | + return shortArray; |
| 180 | + } |
| 181 | + |
| 182 | + /** |
| 183 | + * Extract values from a {@link PrimitiveList.Short} reader to a {@code char[]} array. |
| 184 | + */ |
| 185 | + static char[] toCharArray(PrimitiveList.Short.Reader charReader) { |
| 186 | + char[] charArray = new char[charReader.size()]; |
| 187 | + for (int i = 0; i < charReader.size(); i++) { |
| 188 | + charArray[i] = (char) charReader.get(i); |
| 189 | + } |
| 190 | + return charArray; |
| 191 | + } |
| 192 | + |
| 193 | + /** |
| 194 | + * Extract values from a {@link PrimitiveList.Int} reader to a {@code int[]} array. |
| 195 | + */ |
| 196 | + public static int[] toIntArray(PrimitiveList.Int.Reader intReader) { |
| 197 | + int[] intArray = new int[intReader.size()]; |
| 198 | + for (int i = 0; i < intReader.size(); i++) { |
| 199 | + intArray[i] = intReader.get(i); |
| 200 | + } |
| 201 | + return intArray; |
| 202 | + } |
| 203 | + |
| 204 | + /** |
| 205 | + * Extract values from a {@link PrimitiveList.Float} reader to a {@code float[]} array. |
| 206 | + */ |
| 207 | + static float[] toFloatArray(PrimitiveList.Float.Reader floatReader) { |
| 208 | + float[] floatArray = new float[floatReader.size()]; |
| 209 | + for (int i = 0; i < floatReader.size(); i++) { |
| 210 | + floatArray[i] = floatReader.get(i); |
| 211 | + } |
| 212 | + return floatArray; |
| 213 | + } |
| 214 | + |
| 215 | + /** |
| 216 | + * Extract values from a {@link PrimitiveList.Long} reader to a {@code long[]} array. |
| 217 | + */ |
| 218 | + static long[] toLongArray(PrimitiveList.Long.Reader longReader) { |
| 219 | + long[] longArray = new long[longReader.size()]; |
| 220 | + for (int i = 0; i < longReader.size(); i++) { |
| 221 | + longArray[i] = longReader.get(i); |
| 222 | + } |
| 223 | + return longArray; |
| 224 | + } |
| 225 | + |
| 226 | + /** |
| 227 | + * Extract values from a {@link PrimitiveList.Double} reader to a {@code double[]} array. |
| 228 | + */ |
| 229 | + static double[] toDoubleArray(PrimitiveList.Double.Reader doubleReader) { |
| 230 | + double[] doubleArray = new double[doubleReader.size()]; |
| 231 | + for (int i = 0; i < doubleReader.size(); i++) { |
| 232 | + doubleArray[i] = doubleReader.get(i); |
| 233 | + } |
| 234 | + return doubleArray; |
| 235 | + } |
| 236 | + |
| 237 | + /** |
| 238 | + * Extract values from a {@link TextList} reader to a {@code String[]} array. |
| 239 | + */ |
| 240 | + public static String[] toStringArray(TextList.Reader reader) { |
| 241 | + return toArray(reader, (s) -> s, String[]::new); |
| 242 | + } |
| 243 | + |
| 244 | + /** |
| 245 | + * Find the value containing the given {@code key} in a {@link StructList} reader, applying the |
| 246 | + * {@code keyExtractor} to searched values. The input list should be sorted by the {@code key} |
| 247 | + * and contain no duplicates. |
| 248 | + * |
| 249 | + * @return the found value or {@code null} |
| 250 | + */ |
| 251 | + static <T extends StructReader> T binarySearchUnique(int key, StructList.Reader<T> sortedList, ToIntFunction<T> keyExtractor) { |
| 252 | + int low = 0; |
| 253 | + int high = sortedList.size() - 1; |
| 254 | + |
| 255 | + int prevMid = -1; |
| 256 | + int prevKey = 0; |
| 257 | + while (low <= high) { |
| 258 | + int mid = (low + high) >>> 1; |
| 259 | + T midStruct = sortedList.get(mid); |
| 260 | + int midKey = keyExtractor.applyAsInt(midStruct); |
| 261 | + |
| 262 | + assert prevMid == -1 || (mid < prevMid && midKey < prevKey) || (mid > prevMid && midKey > prevKey) : "unsorted or contains duplicates"; |
| 263 | + |
| 264 | + if (midKey < key) { |
| 265 | + low = mid + 1; |
| 266 | + } else if (midKey > key) { |
| 267 | + high = mid - 1; |
| 268 | + } else { |
| 269 | + return midStruct; |
| 270 | + } |
| 271 | + |
| 272 | + prevMid = mid; |
| 273 | + prevKey = midKey; |
| 274 | + } |
| 275 | + return null; |
| 276 | + } |
| 277 | +} |
0 commit comments