Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 1 | package eu.mulk.jgvariant.core; |
| 2 | |
| 3 | import static java.nio.ByteOrder.LITTLE_ENDIAN; |
| 4 | |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 5 | import java.lang.reflect.InvocationTargetException; |
| 6 | import java.lang.reflect.RecordComponent; |
| 7 | import java.nio.ByteBuffer; |
| 8 | import java.nio.ByteOrder; |
| 9 | import java.nio.charset.Charset; |
Matthias Andreas Benkard | 31c61e7 | 2021-12-16 20:06:39 +0100 | [diff] [blame] | 10 | import java.text.ParseException; |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 11 | import java.util.ArrayList; |
| 12 | import java.util.Arrays; |
| 13 | import java.util.List; |
| 14 | import java.util.Optional; |
Matthias Andreas Benkard | 4e8423d | 2021-12-19 22:56:09 +0100 | [diff] [blame] | 15 | import java.util.function.Function; |
Matthias Andreas Benkard | 25b7f90 | 2021-12-17 06:02:11 +0100 | [diff] [blame] | 16 | import org.apiguardian.api.API; |
| 17 | import org.apiguardian.api.API.Status; |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 18 | import org.jetbrains.annotations.Nullable; |
| 19 | |
| 20 | /** |
Matthias Andreas Benkard | 55c3481 | 2021-12-14 21:51:10 +0100 | [diff] [blame] | 21 | * Type class for decodable types. |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 22 | * |
| 23 | * <p>Use the {@code of*} family of constructor methods to acquire a suitable {@link Decoder} for |
| 24 | * the type you wish to decode. |
| 25 | * |
Matthias Andreas Benkard | 4c32c39 | 2021-12-12 21:23:53 +0100 | [diff] [blame] | 26 | * <p><strong>Example</strong> |
| 27 | * |
| 28 | * <p>To parse a GVariant of type {@code "a(si)"}, which is an array of pairs of {@link String} and |
| 29 | * {@code int}, you can use the following code: |
| 30 | * |
| 31 | * <pre>{@code |
Matthias Andreas Benkard | 35f7a20 | 2021-12-14 19:29:26 +0100 | [diff] [blame] | 32 | * record ExampleRecord(String s, int i) {} |
Matthias Andreas Benkard | 4c32c39 | 2021-12-12 21:23:53 +0100 | [diff] [blame] | 33 | * |
| 34 | * var decoder = |
| 35 | * Decoder.ofArray( |
| 36 | * Decoder.ofStructure( |
| 37 | * ExampleRecord.class, |
Matthias Andreas Benkard | 35f7a20 | 2021-12-14 19:29:26 +0100 | [diff] [blame] | 38 | * Decoder.ofString(UTF_8), |
| 39 | * Decoder.ofInt().withByteOrder(LITTLE_ENDIAN))); |
Matthias Andreas Benkard | 4c32c39 | 2021-12-12 21:23:53 +0100 | [diff] [blame] | 40 | * |
| 41 | * byte[] bytes = ...; |
Matthias Andreas Benkard | 35f7a20 | 2021-12-14 19:29:26 +0100 | [diff] [blame] | 42 | * List<ExampleRecord> example = decoder.decode(ByteBuffer.wrap(bytes)); |
Matthias Andreas Benkard | 4c32c39 | 2021-12-12 21:23:53 +0100 | [diff] [blame] | 43 | * }</pre> |
| 44 | * |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 45 | * @param <T> the type that the {@link Decoder} can decode. |
| 46 | */ |
| 47 | @SuppressWarnings("java:S1610") |
Matthias Andreas Benkard | 25b7f90 | 2021-12-17 06:02:11 +0100 | [diff] [blame] | 48 | @API(status = Status.EXPERIMENTAL) |
Matthias Andreas Benkard | 35f7a20 | 2021-12-14 19:29:26 +0100 | [diff] [blame] | 49 | public abstract class Decoder<T> { |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 50 | |
| 51 | private Decoder() {} |
| 52 | |
| 53 | /** |
Matthias Andreas Benkard | 31c61e7 | 2021-12-16 20:06:39 +0100 | [diff] [blame] | 54 | * Decodes a {@link ByteBuffer} holding a serialized GVariant into a value of type {@code T}. |
| 55 | * |
Matthias Andreas Benkard | 3f13b66 | 2021-12-18 18:57:37 +0100 | [diff] [blame] | 56 | * <p><strong>Note:</strong> Due to the way the GVariant serialization format works, it is |
| 57 | * important that the start and end boundaries of the passed byte slice correspond to the actual |
| 58 | * start and end of the serialized value. The format does generally not allow for the dynamic |
| 59 | * discovery of the end of the data structure. |
| 60 | * |
| 61 | * @param byteSlice a byte slice holding a serialized GVariant. |
| 62 | * @return the deserialized value. |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 63 | * @throws java.nio.BufferUnderflowException if the byte buffer is shorter than the requested |
| 64 | * data. |
Matthias Andreas Benkard | 31c61e7 | 2021-12-16 20:06:39 +0100 | [diff] [blame] | 65 | * @throws IllegalArgumentException if the serialized GVariant is ill-formed |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 66 | */ |
| 67 | public abstract T decode(ByteBuffer byteSlice); |
| 68 | |
| 69 | abstract byte alignment(); |
| 70 | |
| 71 | @Nullable |
| 72 | abstract Integer fixedSize(); |
| 73 | |
| 74 | final boolean hasFixedSize() { |
| 75 | return fixedSize() != null; |
| 76 | } |
| 77 | |
Matthias Andreas Benkard | 4c32c39 | 2021-12-12 21:23:53 +0100 | [diff] [blame] | 78 | /** |
| 79 | * Switches the input {@link ByteBuffer} to a given {@link ByteOrder} before reading from it. |
| 80 | * |
| 81 | * @param byteOrder the byte order to use. |
| 82 | * @return a new, decorated {@link Decoder}. |
| 83 | */ |
Matthias Andreas Benkard | 4e8423d | 2021-12-19 22:56:09 +0100 | [diff] [blame] | 84 | public final Decoder<T> withByteOrder(ByteOrder byteOrder) { |
Matthias Andreas Benkard | 6f993f7 | 2021-12-27 22:40:14 +0100 | [diff] [blame^] | 85 | return new ByteOrderFixingDecoder(byteOrder); |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 86 | } |
| 87 | |
Matthias Andreas Benkard | 4c32c39 | 2021-12-12 21:23:53 +0100 | [diff] [blame] | 88 | /** |
Matthias Andreas Benkard | 4e8423d | 2021-12-19 22:56:09 +0100 | [diff] [blame] | 89 | * Creates a new {@link Decoder} from an existing one by applying a function to the result. |
| 90 | * |
| 91 | * @param function the function to apply. |
| 92 | * @return a new, decorated {@link Decoder}. |
| 93 | * @see java.util.stream.Stream#map |
| 94 | */ |
| 95 | public final <U> Decoder<U> map(Function<T, U> function) { |
Matthias Andreas Benkard | 6f993f7 | 2021-12-27 22:40:14 +0100 | [diff] [blame^] | 96 | return new MappingDecoder<>(function); |
Matthias Andreas Benkard | 4e8423d | 2021-12-19 22:56:09 +0100 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | /** |
Matthias Andreas Benkard | 35f7a20 | 2021-12-14 19:29:26 +0100 | [diff] [blame] | 100 | * Creates a {@link Decoder} for an {@code Array} type. |
Matthias Andreas Benkard | 4c32c39 | 2021-12-12 21:23:53 +0100 | [diff] [blame] | 101 | * |
| 102 | * @param elementDecoder a {@link Decoder} for the elements of the array. |
| 103 | * @param <U> the element type. |
| 104 | * @return a new {@link Decoder}. |
| 105 | */ |
Matthias Andreas Benkard | 35f7a20 | 2021-12-14 19:29:26 +0100 | [diff] [blame] | 106 | public static <U> Decoder<List<U>> ofArray(Decoder<U> elementDecoder) { |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 107 | return new ArrayDecoder<>(elementDecoder); |
| 108 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 109 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 110 | /** |
Matthias Andreas Benkard | 4e8423d | 2021-12-19 22:56:09 +0100 | [diff] [blame] | 111 | * Creates a {@link Decoder} for an {@code Array} type of element type {@code byte} into a |
| 112 | * primitive {@code byte[]} array. |
| 113 | * |
| 114 | * @return a new {@link Decoder}. |
| 115 | */ |
| 116 | public static Decoder<byte[]> ofByteArray() { |
| 117 | return new ByteArrayDecoder(); |
| 118 | } |
| 119 | |
| 120 | /** |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 121 | * Creates a {@link Decoder} for a {@code Maybe} type. |
| 122 | * |
| 123 | * @param elementDecoder a {@link Decoder} for the contained element. |
| 124 | * @param <U> the element type. |
| 125 | * @return a new {@link Decoder}. |
| 126 | */ |
| 127 | public static <U> Decoder<Optional<U>> ofMaybe(Decoder<U> elementDecoder) { |
| 128 | return new MaybeDecoder<>(elementDecoder); |
| 129 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 130 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 131 | /** |
Matthias Andreas Benkard | 55c3481 | 2021-12-14 21:51:10 +0100 | [diff] [blame] | 132 | * Creates a {@link Decoder} for a {@code Structure} type, decoding into a {@link Record}. |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 133 | * |
| 134 | * @param recordType the {@link Record} type that represents the components of the structure. |
| 135 | * @param componentDecoders a {@link Decoder} for each component of the structure. |
| 136 | * @param <U> the {@link Record} type that represents the components of the structure. |
| 137 | * @return a new {@link Decoder}. |
| 138 | */ |
| 139 | public static <U extends Record> Decoder<U> ofStructure( |
| 140 | Class<U> recordType, Decoder<?>... componentDecoders) { |
| 141 | return new StructureDecoder<>(recordType, componentDecoders); |
| 142 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 143 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 144 | /** |
Matthias Andreas Benkard | 55c3481 | 2021-12-14 21:51:10 +0100 | [diff] [blame] | 145 | * Creates a {@link Decoder} for a {@code Structure} type, decoding into a {@link List}. |
| 146 | * |
| 147 | * <p>Prefer {@link #ofStructure(Class, Decoder[])} if possible, which is both more type-safe and |
| 148 | * more convenient. |
| 149 | * |
| 150 | * @param componentDecoders a {@link Decoder} for each component of the structure. |
| 151 | * @return a new {@link Decoder}. |
| 152 | */ |
| 153 | public static Decoder<Object[]> ofStructure(Decoder<?>... componentDecoders) { |
| 154 | return new TupleDecoder(componentDecoders); |
| 155 | } |
| 156 | |
| 157 | /** |
Matthias Andreas Benkard | b50fcd0 | 2021-12-16 20:17:20 +0100 | [diff] [blame] | 158 | * Creates a {@link Decoder} for the {@link Variant} type. |
Matthias Andreas Benkard | 55c3481 | 2021-12-14 21:51:10 +0100 | [diff] [blame] | 159 | * |
Matthias Andreas Benkard | b50fcd0 | 2021-12-16 20:17:20 +0100 | [diff] [blame] | 160 | * <p>The contained {@link Object} can be of one of the following types: |
Matthias Andreas Benkard | 55c3481 | 2021-12-14 21:51:10 +0100 | [diff] [blame] | 161 | * |
| 162 | * <ul> |
| 163 | * <li>{@link Boolean} |
| 164 | * <li>{@link Byte} |
| 165 | * <li>{@link Short} |
| 166 | * <li>{@link Integer} |
| 167 | * <li>{@link Long} |
| 168 | * <li>{@link String} |
| 169 | * <li>{@link Optional} (a GVariant {@code Maybe} type) |
| 170 | * <li>{@link List} (a GVariant array) |
Matthias Andreas Benkard | a66b73d | 2021-12-18 19:15:52 +0100 | [diff] [blame] | 171 | * <li>{@code Object[]} (a GVariant structure) |
Matthias Andreas Benkard | b50fcd0 | 2021-12-16 20:17:20 +0100 | [diff] [blame] | 172 | * <li>{@link Variant} (a nested variant) |
Matthias Andreas Benkard | 55c3481 | 2021-12-14 21:51:10 +0100 | [diff] [blame] | 173 | * </ul> |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 174 | * |
| 175 | * @return a new {@link Decoder}. |
| 176 | */ |
Matthias Andreas Benkard | 31c61e7 | 2021-12-16 20:06:39 +0100 | [diff] [blame] | 177 | public static Decoder<Variant> ofVariant() { |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 178 | return new VariantDecoder(); |
| 179 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 180 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 181 | /** |
Matthias Andreas Benkard | b50fcd0 | 2021-12-16 20:17:20 +0100 | [diff] [blame] | 182 | * Creates a {@link Decoder} for the {@code boolean} type. |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 183 | * |
| 184 | * @return a new {@link Decoder}. |
| 185 | */ |
| 186 | public static Decoder<Boolean> ofBoolean() { |
| 187 | return new BooleanDecoder(); |
| 188 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 189 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 190 | /** |
Matthias Andreas Benkard | 55c3481 | 2021-12-14 21:51:10 +0100 | [diff] [blame] | 191 | * Creates a {@link Decoder} for the 8-bit {@code byte} type. |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 192 | * |
| 193 | * <p><strong>Note:</strong> It is often useful to apply {@link #withByteOrder(ByteOrder)} to the |
| 194 | * result of this method. |
| 195 | * |
| 196 | * @return a new {@link Decoder}. |
| 197 | */ |
| 198 | public static Decoder<Byte> ofByte() { |
| 199 | return new ByteDecoder(); |
| 200 | } |
| 201 | |
| 202 | /** |
| 203 | * Creates a {@link Decoder} for the 16-bit {@code short} type. |
| 204 | * |
| 205 | * <p><strong>Note:</strong> It is often useful to apply {@link #withByteOrder(ByteOrder)} to the |
| 206 | * result of this method. |
| 207 | * |
| 208 | * @return a new {@link Decoder}. |
| 209 | */ |
| 210 | public static Decoder<Short> ofShort() { |
| 211 | return new ShortDecoder(); |
| 212 | } |
| 213 | |
| 214 | /** |
| 215 | * Creates a {@link Decoder} for the 32-bit {@code int} type. |
| 216 | * |
| 217 | * <p><strong>Note:</strong> It is often useful to apply {@link #withByteOrder(ByteOrder)} to the |
| 218 | * result of this method. |
| 219 | * |
| 220 | * @return a new {@link Decoder}. |
| 221 | */ |
| 222 | public static Decoder<Integer> ofInt() { |
| 223 | return new IntegerDecoder(); |
| 224 | } |
| 225 | |
| 226 | /** |
| 227 | * Creates a {@link Decoder} for the 64-bit {@code long} type. |
| 228 | * |
| 229 | * <p><strong>Note:</strong> It is often useful to apply {@link #withByteOrder(ByteOrder)} to the |
| 230 | * result of this method. |
| 231 | * |
| 232 | * @return a new {@link Decoder}. |
| 233 | */ |
| 234 | public static Decoder<Long> ofLong() { |
| 235 | return new LongDecoder(); |
| 236 | } |
| 237 | |
| 238 | /** |
| 239 | * Creates a {@link Decoder} for the {@code double} type. |
| 240 | * |
| 241 | * @return a new {@link Decoder}. |
| 242 | */ |
| 243 | public static Decoder<Double> ofDouble() { |
| 244 | return new DoubleDecoder(); |
| 245 | } |
| 246 | |
| 247 | /** |
| 248 | * Creates a {@link Decoder} for the {@link String} type. |
| 249 | * |
| 250 | * <p><strong>Note:</strong> While GVariant does not prescribe any particular encoding, {@link |
| 251 | * java.nio.charset.StandardCharsets#UTF_8} is the most common choice. |
| 252 | * |
Matthias Andreas Benkard | 3f13b66 | 2021-12-18 18:57:37 +0100 | [diff] [blame] | 253 | * @param charset the {@link Charset} the string is encoded in. |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 254 | * @return a new {@link Decoder}. |
| 255 | */ |
| 256 | public static Decoder<String> ofString(Charset charset) { |
| 257 | return new StringDecoder(charset); |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 258 | } |
| 259 | |
| 260 | private static int align(int offset, byte alignment) { |
| 261 | return offset % alignment == 0 ? offset : offset + alignment - (offset % alignment); |
| 262 | } |
| 263 | |
| 264 | private static int getIntN(ByteBuffer byteSlice) { |
| 265 | var intBytes = new byte[4]; |
| 266 | byteSlice.get(intBytes, 0, Math.min(4, byteSlice.limit())); |
| 267 | return ByteBuffer.wrap(intBytes).order(LITTLE_ENDIAN).getInt(); |
| 268 | } |
| 269 | |
| 270 | @SuppressWarnings("java:S3358") |
| 271 | private static int byteCount(int n) { |
| 272 | return n < (1 << 8) ? 1 : n < (1 << 16) ? 2 : 4; |
| 273 | } |
| 274 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 275 | private static class ArrayDecoder<U> extends Decoder<List<U>> { |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 276 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 277 | private final Decoder<U> elementDecoder; |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 278 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 279 | ArrayDecoder(Decoder<U> elementDecoder) { |
| 280 | this.elementDecoder = elementDecoder; |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 281 | } |
| 282 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 283 | @Override |
| 284 | public byte alignment() { |
| 285 | return elementDecoder.alignment(); |
| 286 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 287 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 288 | @Override |
| 289 | @Nullable |
| 290 | Integer fixedSize() { |
| 291 | return null; |
| 292 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 293 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 294 | @Override |
| 295 | public List<U> decode(ByteBuffer byteSlice) { |
| 296 | List<U> elements; |
| 297 | |
| 298 | var elementSize = elementDecoder.fixedSize(); |
| 299 | if (elementSize != null) { |
| 300 | // A simple C-style array. |
| 301 | elements = new ArrayList<>(byteSlice.limit() / elementSize); |
| 302 | for (int i = 0; i < byteSlice.limit(); i += elementSize) { |
Matthias Andreas Benkard | 6f993f7 | 2021-12-27 22:40:14 +0100 | [diff] [blame^] | 303 | var element = elementDecoder.decode(slicePreservingOrder(byteSlice, i, elementSize)); |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 304 | elements.add(element); |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 305 | } |
Matthias Andreas Benkard | 4e8423d | 2021-12-19 22:56:09 +0100 | [diff] [blame] | 306 | } else if (byteSlice.limit() == 0) { |
| 307 | // A degenerate zero-length array of variable width. |
| 308 | elements = List.of(); |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 309 | } else { |
| 310 | // An array with aligned elements and a vector of framing offsets in the end. |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 311 | int framingOffsetSize = byteCount(byteSlice.limit()); |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 312 | int lastFramingOffset = |
| 313 | getIntN(byteSlice.slice(byteSlice.limit() - framingOffsetSize, framingOffsetSize)); |
| 314 | int elementCount = (byteSlice.limit() - lastFramingOffset) / framingOffsetSize; |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 315 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 316 | elements = new ArrayList<>(elementCount); |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 317 | int position = 0; |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 318 | for (int i = 0; i < elementCount; i++) { |
| 319 | int framingOffset = |
| 320 | getIntN( |
| 321 | byteSlice.slice(lastFramingOffset + i * framingOffsetSize, framingOffsetSize)); |
Matthias Andreas Benkard | 6f993f7 | 2021-12-27 22:40:14 +0100 | [diff] [blame^] | 322 | elements.add( |
| 323 | elementDecoder.decode( |
| 324 | slicePreservingOrder(byteSlice, position, framingOffset - position))); |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 325 | position = align(framingOffset, alignment()); |
| 326 | } |
| 327 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 328 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 329 | return elements; |
| 330 | } |
| 331 | } |
| 332 | |
Matthias Andreas Benkard | 4e8423d | 2021-12-19 22:56:09 +0100 | [diff] [blame] | 333 | private static class ByteArrayDecoder extends Decoder<byte[]> { |
| 334 | |
| 335 | private static final int ELEMENT_SIZE = 1; |
| 336 | |
| 337 | @Override |
| 338 | public byte alignment() { |
| 339 | return ELEMENT_SIZE; |
| 340 | } |
| 341 | |
| 342 | @Override |
| 343 | @Nullable |
| 344 | Integer fixedSize() { |
| 345 | return null; |
| 346 | } |
| 347 | |
| 348 | @Override |
| 349 | public byte[] decode(ByteBuffer byteSlice) { |
| 350 | // A simple C-style array. |
| 351 | byte[] elements = new byte[byteSlice.limit() / ELEMENT_SIZE]; |
| 352 | byteSlice.get(elements); |
| 353 | return elements; |
| 354 | } |
| 355 | } |
| 356 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 357 | private static class MaybeDecoder<U> extends Decoder<Optional<U>> { |
| 358 | |
| 359 | private final Decoder<U> elementDecoder; |
| 360 | |
| 361 | MaybeDecoder(Decoder<U> elementDecoder) { |
| 362 | this.elementDecoder = elementDecoder; |
| 363 | } |
| 364 | |
| 365 | @Override |
| 366 | public byte alignment() { |
| 367 | return elementDecoder.alignment(); |
| 368 | } |
| 369 | |
| 370 | @Override |
| 371 | @Nullable |
| 372 | Integer fixedSize() { |
| 373 | return null; |
| 374 | } |
| 375 | |
| 376 | @Override |
| 377 | public Optional<U> decode(ByteBuffer byteSlice) { |
| 378 | if (!byteSlice.hasRemaining()) { |
| 379 | return Optional.empty(); |
| 380 | } else { |
| 381 | if (!elementDecoder.hasFixedSize()) { |
| 382 | // Remove trailing zero byte. |
| 383 | byteSlice.limit(byteSlice.limit() - 1); |
| 384 | } |
| 385 | |
| 386 | return Optional.of(elementDecoder.decode(byteSlice)); |
| 387 | } |
| 388 | } |
| 389 | } |
| 390 | |
| 391 | private static class StructureDecoder<U extends Record> extends Decoder<U> { |
| 392 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 393 | private final Class<U> recordType; |
Matthias Andreas Benkard | 55c3481 | 2021-12-14 21:51:10 +0100 | [diff] [blame] | 394 | private final TupleDecoder tupleDecoder; |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 395 | |
| 396 | StructureDecoder(Class<U> recordType, Decoder<?>... componentDecoders) { |
| 397 | var recordComponents = recordType.getRecordComponents(); |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 398 | if (componentDecoders.length != recordComponents.length) { |
| 399 | throw new IllegalArgumentException( |
| 400 | "number of decoders (%d) does not match number of structure components (%d)" |
| 401 | .formatted(componentDecoders.length, recordComponents.length)); |
| 402 | } |
| 403 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 404 | this.recordType = recordType; |
Matthias Andreas Benkard | 55c3481 | 2021-12-14 21:51:10 +0100 | [diff] [blame] | 405 | this.tupleDecoder = new TupleDecoder(componentDecoders); |
| 406 | } |
| 407 | |
| 408 | @Override |
| 409 | public byte alignment() { |
| 410 | return tupleDecoder.alignment(); |
| 411 | } |
| 412 | |
| 413 | @Override |
| 414 | public Integer fixedSize() { |
| 415 | return tupleDecoder.fixedSize(); |
| 416 | } |
| 417 | |
| 418 | @Override |
| 419 | public U decode(ByteBuffer byteSlice) { |
| 420 | Object[] recordConstructorArguments = tupleDecoder.decode(byteSlice); |
| 421 | |
| 422 | try { |
| 423 | var recordComponentTypes = |
| 424 | Arrays.stream(recordType.getRecordComponents()) |
| 425 | .map(RecordComponent::getType) |
| 426 | .toArray(Class<?>[]::new); |
| 427 | var recordConstructor = recordType.getDeclaredConstructor(recordComponentTypes); |
| 428 | return recordConstructor.newInstance(recordConstructorArguments); |
| 429 | } catch (NoSuchMethodException |
| 430 | | InstantiationException |
| 431 | | IllegalAccessException |
| 432 | | InvocationTargetException e) { |
| 433 | throw new IllegalStateException(e); |
| 434 | } |
| 435 | } |
| 436 | } |
| 437 | |
| 438 | private static class TupleDecoder extends Decoder<Object[]> { |
| 439 | |
| 440 | private final Decoder<?>[] componentDecoders; |
| 441 | |
| 442 | TupleDecoder(Decoder<?>... componentDecoders) { |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 443 | this.componentDecoders = componentDecoders; |
| 444 | } |
| 445 | |
| 446 | @Override |
| 447 | public byte alignment() { |
| 448 | return (byte) Arrays.stream(componentDecoders).mapToInt(Decoder::alignment).max().orElse(1); |
| 449 | } |
| 450 | |
| 451 | @Override |
| 452 | public Integer fixedSize() { |
| 453 | int position = 0; |
| 454 | for (var componentDecoder : componentDecoders) { |
| 455 | var fixedComponentSize = componentDecoder.fixedSize(); |
| 456 | if (fixedComponentSize == null) { |
| 457 | return null; |
| 458 | } |
| 459 | |
| 460 | position = align(position, componentDecoder.alignment()); |
| 461 | position += fixedComponentSize; |
| 462 | } |
| 463 | |
| 464 | if (position == 0) { |
| 465 | return 1; |
| 466 | } |
| 467 | |
| 468 | return align(position, alignment()); |
| 469 | } |
| 470 | |
| 471 | @Override |
Matthias Andreas Benkard | 55c3481 | 2021-12-14 21:51:10 +0100 | [diff] [blame] | 472 | public Object[] decode(ByteBuffer byteSlice) { |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 473 | int framingOffsetSize = byteCount(byteSlice.limit()); |
| 474 | |
Matthias Andreas Benkard | 55c3481 | 2021-12-14 21:51:10 +0100 | [diff] [blame] | 475 | var objects = new Object[componentDecoders.length]; |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 476 | |
| 477 | int position = 0; |
| 478 | int framingOffsetIndex = 0; |
| 479 | int componentIndex = 0; |
| 480 | for (var componentDecoder : componentDecoders) { |
| 481 | position = align(position, componentDecoder.alignment()); |
| 482 | |
| 483 | var fixedComponentSize = componentDecoder.fixedSize(); |
| 484 | if (fixedComponentSize != null) { |
Matthias Andreas Benkard | 55c3481 | 2021-12-14 21:51:10 +0100 | [diff] [blame] | 485 | objects[componentIndex] = |
Matthias Andreas Benkard | 6f993f7 | 2021-12-27 22:40:14 +0100 | [diff] [blame^] | 486 | componentDecoder.decode( |
| 487 | slicePreservingOrder(byteSlice, position, fixedComponentSize)); |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 488 | position += fixedComponentSize; |
| 489 | } else { |
Matthias Andreas Benkard | 55c3481 | 2021-12-14 21:51:10 +0100 | [diff] [blame] | 490 | if (componentIndex == componentDecoders.length - 1) { |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 491 | // The last component never has a framing offset. |
| 492 | int endPosition = byteSlice.limit() - framingOffsetIndex * framingOffsetSize; |
Matthias Andreas Benkard | 55c3481 | 2021-12-14 21:51:10 +0100 | [diff] [blame] | 493 | objects[componentIndex] = |
Matthias Andreas Benkard | 6f993f7 | 2021-12-27 22:40:14 +0100 | [diff] [blame^] | 494 | componentDecoder.decode( |
| 495 | slicePreservingOrder(byteSlice, position, endPosition - position)); |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 496 | position = endPosition; |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 497 | } else { |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 498 | int framingOffset = |
| 499 | getIntN( |
| 500 | byteSlice.slice( |
| 501 | byteSlice.limit() - (1 + framingOffsetIndex) * framingOffsetSize, |
| 502 | framingOffsetSize)); |
Matthias Andreas Benkard | 55c3481 | 2021-12-14 21:51:10 +0100 | [diff] [blame] | 503 | objects[componentIndex] = |
Matthias Andreas Benkard | 6f993f7 | 2021-12-27 22:40:14 +0100 | [diff] [blame^] | 504 | componentDecoder.decode( |
| 505 | slicePreservingOrder(byteSlice, position, framingOffset - position)); |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 506 | position = framingOffset; |
| 507 | ++framingOffsetIndex; |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 508 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 509 | } |
| 510 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 511 | ++componentIndex; |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 512 | } |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 513 | |
Matthias Andreas Benkard | 55c3481 | 2021-12-14 21:51:10 +0100 | [diff] [blame] | 514 | return objects; |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 515 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 516 | } |
| 517 | |
Matthias Andreas Benkard | 31c61e7 | 2021-12-16 20:06:39 +0100 | [diff] [blame] | 518 | private static class VariantDecoder extends Decoder<Variant> { |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 519 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 520 | @Override |
| 521 | public byte alignment() { |
| 522 | return 8; |
| 523 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 524 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 525 | @Override |
| 526 | @Nullable |
| 527 | Integer fixedSize() { |
| 528 | return null; |
| 529 | } |
| 530 | |
| 531 | @Override |
Matthias Andreas Benkard | 31c61e7 | 2021-12-16 20:06:39 +0100 | [diff] [blame] | 532 | public Variant decode(ByteBuffer byteSlice) { |
Matthias Andreas Benkard | 55c3481 | 2021-12-14 21:51:10 +0100 | [diff] [blame] | 533 | for (int i = byteSlice.limit() - 1; i >= 0; --i) { |
| 534 | if (byteSlice.get(i) != 0) { |
| 535 | continue; |
| 536 | } |
| 537 | |
Matthias Andreas Benkard | 6f993f7 | 2021-12-27 22:40:14 +0100 | [diff] [blame^] | 538 | var dataBytes = slicePreservingOrder(byteSlice, 0, i); |
Matthias Andreas Benkard | 31c61e7 | 2021-12-16 20:06:39 +0100 | [diff] [blame] | 539 | var signatureBytes = byteSlice.slice(i + 1, byteSlice.limit() - (i + 1)); |
Matthias Andreas Benkard | 55c3481 | 2021-12-14 21:51:10 +0100 | [diff] [blame] | 540 | |
Matthias Andreas Benkard | 31c61e7 | 2021-12-16 20:06:39 +0100 | [diff] [blame] | 541 | Signature signature; |
| 542 | try { |
| 543 | signature = Signature.parse(signatureBytes); |
| 544 | } catch (ParseException e) { |
| 545 | throw new IllegalArgumentException(e); |
| 546 | } |
| 547 | |
| 548 | return new Variant(signature, signature.decoder().decode(dataBytes)); |
Matthias Andreas Benkard | 55c3481 | 2021-12-14 21:51:10 +0100 | [diff] [blame] | 549 | } |
| 550 | |
| 551 | throw new IllegalArgumentException("variant signature not found"); |
| 552 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 553 | } |
| 554 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 555 | private static class BooleanDecoder extends Decoder<Boolean> { |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 556 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 557 | @Override |
| 558 | public byte alignment() { |
| 559 | return 1; |
| 560 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 561 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 562 | @Override |
| 563 | public Integer fixedSize() { |
| 564 | return 1; |
| 565 | } |
| 566 | |
| 567 | @Override |
| 568 | public Boolean decode(ByteBuffer byteSlice) { |
| 569 | return byteSlice.get() != 0; |
| 570 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 571 | } |
| 572 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 573 | private static class ByteDecoder extends Decoder<Byte> { |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 574 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 575 | @Override |
| 576 | public byte alignment() { |
| 577 | return 1; |
| 578 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 579 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 580 | @Override |
| 581 | public Integer fixedSize() { |
| 582 | return 1; |
| 583 | } |
| 584 | |
| 585 | @Override |
| 586 | public Byte decode(ByteBuffer byteSlice) { |
| 587 | return byteSlice.get(); |
| 588 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 589 | } |
| 590 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 591 | private static class ShortDecoder extends Decoder<Short> { |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 592 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 593 | @Override |
| 594 | public byte alignment() { |
| 595 | return 2; |
| 596 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 597 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 598 | @Override |
| 599 | public Integer fixedSize() { |
| 600 | return 2; |
| 601 | } |
| 602 | |
| 603 | @Override |
| 604 | public Short decode(ByteBuffer byteSlice) { |
| 605 | return byteSlice.getShort(); |
| 606 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 607 | } |
| 608 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 609 | private static class IntegerDecoder extends Decoder<Integer> { |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 610 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 611 | @Override |
| 612 | public byte alignment() { |
| 613 | return 4; |
| 614 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 615 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 616 | @Override |
| 617 | public Integer fixedSize() { |
| 618 | return 4; |
| 619 | } |
| 620 | |
| 621 | @Override |
| 622 | public Integer decode(ByteBuffer byteSlice) { |
| 623 | return byteSlice.getInt(); |
| 624 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 625 | } |
| 626 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 627 | private static class LongDecoder extends Decoder<Long> { |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 628 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 629 | @Override |
| 630 | public byte alignment() { |
| 631 | return 8; |
| 632 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 633 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 634 | @Override |
| 635 | public Integer fixedSize() { |
| 636 | return 8; |
| 637 | } |
| 638 | |
| 639 | @Override |
| 640 | public Long decode(ByteBuffer byteSlice) { |
| 641 | return byteSlice.getLong(); |
| 642 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 643 | } |
| 644 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 645 | private static class DoubleDecoder extends Decoder<Double> { |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 646 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 647 | @Override |
| 648 | public byte alignment() { |
| 649 | return 8; |
| 650 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 651 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 652 | @Override |
| 653 | public Integer fixedSize() { |
| 654 | return 8; |
| 655 | } |
| 656 | |
| 657 | @Override |
| 658 | public Double decode(ByteBuffer byteSlice) { |
| 659 | return byteSlice.getDouble(); |
| 660 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 661 | } |
| 662 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 663 | private static class StringDecoder extends Decoder<String> { |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 664 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 665 | private final Charset charset; |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 666 | |
Matthias Andreas Benkard | 3443018 | 2021-12-14 20:00:36 +0100 | [diff] [blame] | 667 | public StringDecoder(Charset charset) { |
| 668 | this.charset = charset; |
| 669 | } |
| 670 | |
| 671 | @Override |
| 672 | public byte alignment() { |
| 673 | return 1; |
| 674 | } |
| 675 | |
| 676 | @Override |
| 677 | @Nullable |
| 678 | Integer fixedSize() { |
| 679 | return null; |
| 680 | } |
| 681 | |
| 682 | @Override |
| 683 | public String decode(ByteBuffer byteSlice) { |
| 684 | byteSlice.limit(byteSlice.limit() - 1); |
| 685 | return charset.decode(byteSlice).toString(); |
| 686 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 687 | } |
Matthias Andreas Benkard | 6f993f7 | 2021-12-27 22:40:14 +0100 | [diff] [blame^] | 688 | |
| 689 | private class MappingDecoder<U> extends Decoder<U> { |
| 690 | |
| 691 | private final Function<T, U> function; |
| 692 | |
| 693 | public MappingDecoder(Function<T, U> function) { |
| 694 | this.function = function; |
| 695 | } |
| 696 | |
| 697 | @Override |
| 698 | public byte alignment() { |
| 699 | return Decoder.this.alignment(); |
| 700 | } |
| 701 | |
| 702 | @Override |
| 703 | public @Nullable Integer fixedSize() { |
| 704 | return Decoder.this.fixedSize(); |
| 705 | } |
| 706 | |
| 707 | @Override |
| 708 | public U decode(ByteBuffer byteSlice) { |
| 709 | return function.apply(Decoder.this.decode(byteSlice)); |
| 710 | } |
| 711 | } |
| 712 | |
| 713 | private class ByteOrderFixingDecoder extends Decoder<T> { |
| 714 | |
| 715 | private final ByteOrder byteOrder; |
| 716 | |
| 717 | public ByteOrderFixingDecoder(ByteOrder byteOrder) { |
| 718 | this.byteOrder = byteOrder; |
| 719 | } |
| 720 | |
| 721 | @Override |
| 722 | public byte alignment() { |
| 723 | return Decoder.this.alignment(); |
| 724 | } |
| 725 | |
| 726 | @Override |
| 727 | public @Nullable Integer fixedSize() { |
| 728 | return Decoder.this.fixedSize(); |
| 729 | } |
| 730 | |
| 731 | @Override |
| 732 | public T decode(ByteBuffer byteSlice) { |
| 733 | var newByteSlice = byteSlice.duplicate(); |
| 734 | newByteSlice.order(byteOrder); |
| 735 | return Decoder.this.decode(newByteSlice); |
| 736 | } |
| 737 | } |
| 738 | |
| 739 | private static ByteBuffer slicePreservingOrder(ByteBuffer byteSlice, int index, int length) { |
| 740 | return byteSlice.slice(index, length).order(byteSlice.order()); |
| 741 | } |
Matthias Andreas Benkard | 261532a | 2021-12-12 20:09:27 +0100 | [diff] [blame] | 742 | } |