DBot/kommons
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ByteKey UUID and wrap() construction

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This commit is contained in:
DBotThePony 2024-02-17 19:36:22 +07:00
parent 7a059821f8
commit 86ad24ccdb
Signed by: DBot
GPG Key ID: DCC23B5715498507
2 changed files with 50 additions and 2 deletions
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1
src/main/kotlin/ru/dbotthepony/kommons/io/BTreeDB6.kt
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@ -65,6 +65,7 @@ private fun readHeader(reader: RandomAccessFile, required: Char) {
// TODO: Add keys to DATA blocks, so entire tree can be reconstructed from scratch in event of both trees become unreadable
// TODO: Changeset counter (to determine write-in-progress blocks/trees, to ignore them when reconstructing tree)
// TODO: Tree rotations (rebalancing)
// TODO: Removal of keys
class BTreeDB6 private constructor(override val file: File, private var reader: RandomAccessFile, pool: Executor, private val sync: Boolean) : ByteDataBTreeDB<ByteKey>() {
constructor(file: File, pool: Executor, sync: Boolean = true) : this(file, RandomAccessFile(file, "rw"), pool, sync)

51
src/main/kotlin/ru/dbotthepony/kommons/io/ByteKey.kt
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@ -2,9 +2,36 @@ package ru.dbotthepony.kommons.io
import java.io.InputStream
import java.io.OutputStream
import java.util.UUID
class ByteKey(private vararg val bytes: Byte) : Comparable<ByteKey> {
constructor(key: String) : this(*key.toByteArray())
private fun toBytes(key: UUID): ByteArray {
val value = ByteArray(16)
value[0] = ((key.mostSignificantBits ushr 56) and 0xFFL).toByte()
value[1] = ((key.mostSignificantBits ushr 48) and 0xFFL).toByte()
value[2] = ((key.mostSignificantBits ushr 40) and 0xFFL).toByte()
value[3] = ((key.mostSignificantBits ushr 32) and 0xFFL).toByte()
value[4] = ((key.mostSignificantBits ushr 24) and 0xFFL).toByte()
value[5] = ((key.mostSignificantBits ushr 16) and 0xFFL).toByte()
value[6] = ((key.mostSignificantBits ushr 8) and 0xFFL).toByte()
value[7] = ((key.mostSignificantBits ushr 0) and 0xFFL).toByte()
value[8 + 0] = ((key.leastSignificantBits ushr 56) and 0xFFL).toByte()
value[8 + 1] = ((key.leastSignificantBits ushr 48) and 0xFFL).toByte()
value[8 + 2] = ((key.leastSignificantBits ushr 40) and 0xFFL).toByte()
value[8 + 3] = ((key.leastSignificantBits ushr 32) and 0xFFL).toByte()
value[8 + 4] = ((key.leastSignificantBits ushr 24) and 0xFFL).toByte()
value[8 + 5] = ((key.leastSignificantBits ushr 16) and 0xFFL).toByte()
value[8 + 6] = ((key.leastSignificantBits ushr 8) and 0xFFL).toByte()
value[8 + 7] = ((key.leastSignificantBits ushr 0) and 0xFFL).toByte()
return value
}
class ByteKey private constructor(private val bytes: ByteArray, mark: Nothing?) : Comparable<ByteKey> {
constructor(vararg bytes: Byte) : this(bytes, null)
constructor(key: String) : this(key.toByteArray(), null)
constructor(key: UUID) : this(toBytes(key), null)
override fun equals(other: Any?): Boolean {
return this === other || other is ByteKey && other.bytes.contentEquals(bytes)
@ -52,4 +79,24 @@ class ByteKey(private vararg val bytes: Byte) : Comparable<ByteKey> {
return 0
}
companion object {
/**
* Constructs [ByteKey] without any copying of provided array
*/
@JvmStatic
fun wrap(bytes: ByteArray): ByteKey {
return ByteKey(bytes, null)
}
@JvmStatic
fun read(stream: InputStream): ByteKey {
return stream.readByteKey()
}
@JvmStatic
fun readRaw(stream: InputStream, size: Int): ByteKey {
return stream.readByteKeyRaw(size)
}
}
}