core/org.gnit.lucenekmp.util/StringHelper

StringHelper

object StringHelper

Methods for manipulating strings.

Properties

GOOD_FAST_HASH_SEED

var GOOD_FAST_HASH_SEED: Int

Pass this as the seed to .murmurhash3_x86_32.

ID_LENGTH

const val ID_LENGTH: Int = 16

length in bytes of an ID

Functions

bytesDifference

fun bytesDifference(priorTerm: BytesRef, currentTerm: BytesRef?): Int

Compares two BytesRef, element by element, and returns the number of elements common to both arrays (from the start of each). This method assumes currentTerm comes after priorTerm.

endsWith

fun endsWith(ref: BytesRef, suffix: BytesRef): Boolean

Returns true iff the ref ends with the given suffix. Otherwise false.

idToString

fun idToString(id: ByteArray?): String

Helper method to render an ID as a string, for debugging

intsRefToBytesRef

fun intsRefToBytesRef(ints: IntsRef): BytesRef

Just converts each int in the incoming IntsRef to each byte in the returned [ ], throwing IllegalArgumentException if any int value is out of bounds for a byte.

murmurhash3_x64_128

fun murmurhash3_x64_128(data: BytesRef): LongArray

fun murmurhash3_x64_128(data: ByteArray, offset: Int, length: Int, seed: Int): LongArray

Generates 128-bit hash from the byte array with the given offset, length and seed.

murmurhash3_x86_32

fun murmurhash3_x86_32(bytes: BytesRef, seed: Int): Int

fun murmurhash3_x86_32(data: ByteArray, offset: Int, len: Int, seed: Int): Int

Returns the MurmurHash3_x86_32 hash. Original source/tests at https://github.com/yonik/java_util/

randomId

fun randomId(): ByteArray

Generates a non-cryptographic globally unique id.

sortKeyLength

fun sortKeyLength(priorTerm: BytesRef, currentTerm: BytesRef): Int

Returns the length of currentTerm needed for use as a sort key. so that still returns the same result. This method assumes currentTerm comes after priorTerm.

startsWith

fun startsWith(ref: ByteArray, prefix: BytesRef): Boolean

fun startsWith(ref: BytesRef, prefix: BytesRef): Boolean

Returns true iff the ref starts with the given prefix. Otherwise false * .